A Complete Book of Mcse by Amit Malhotra

M.C.S.E. Microsoft Certified System EngineerHere System refers to performing a specific job.

Microsoft is a company which provides their certification for a system Engineer.

NETWORK: Two or more objects connected to each other.OR

Group of Pc’s physically connected through a communication media.

NETWORKING: The process in which network deployed for information and resource sharing.OR

Sharing of resources is known as Networking.OR

The sharing of information and resources within a network.

Benefits Of Networking

F For File Sharing.P For Printer Sharing. M For Mailing.A For Application Sharing. D For Database Sharing.

Topic 1 Media of Networking

There are three media of networking are:-1) By Wire2) By Air3) By Light

First of all we discuss all media one by one

By Wire: - Wire is a common way of networking.There are three types of cables:-

1) UTP/ STP:-This consists of two insulated copper conductors twisted around one another and enclosed in a simple plastic encasement.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Connector used for UTP/STP are RJ45 Connector

2) Co-axial: - This consists of two insulated copper conductor surrounded by a tube shaped copper braid. Coaxial cabling is the primary type of cabling used by the cable television industry and is also widely used for computer networks, such as Ethernet

Connector used for Co-axial are BNC Connector

3) Fiber Optic:-This consists of very fine fiber made from two types of glass, one for the inner core and the other for the outer layer. The two glasses have different indexes of refraction. A light beam is carried through this glass fiber and is modulated by the network to shape the signal. Pulses of light are used to carry the signals.

Connector used for Co-axial are LC, ST/BFOC, SC, FC Connector

Copyright AMIT MALHOTRA MCSEBOOK

2007, All rights reserved

By Air: - Air is a common way of networking.There are three types of Air network:-

1) Low Frequency2) Medium Frequency3) High Frequency

1) Low Frequency: In Low Frequency the devices used are Infrared and Bluetooth. 30 kHz to 300 kHzBasically Infrared rays are Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwaves.

Bluetooth are Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game consoles over a secure, globally unlicensed short-range radio frequency.

Bluetooth is a standard and communications protocol primarily designed for low power consumption, with a short range (power-class-dependent: 1 meter, 10 meters, 100 meters)[1] based on low-cost transceiver microchips in each device.

2) Medium Frequency: In Medium Frequency the devices used are WLL, GSM & CDMA. 3 km to 300 km.

WLL:- Wireless Local Loop.Wireless local loop (WLL), is a term for the use of a wireless communications link as the "last mile / first mile" connection for delivering plain old telephone service (POTS) and/or broadband Internet to telecommunications customers. Various types of WLL systems and technologies exist.

Other terms for this type of access include Broadband Wireless Access (BWA), Radio in the Loop (RITL), Fixed-Radio Access (FRA) and Fixed Wireless Access (FWA).

GSM: - Global System for Mobile communications (GSM: originally from Groupe Spécial Mobile) is the most popular standard for mobile phones in the world. Its promoter, the GSM Association, estimates that 82% of the global mobile market uses the standard [1]. GSM is used by over 2 billion people across more than 212 countries and territories.[2][3] Its ubiquity makes international roaming very common between mobile phone operators, enabling subscribers to use their phones in many parts of the world. GSM differs from its predecessors in that both

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

signaling and speech channels are digital call quality, and so is

considered a second generation (2G) mobile phone system. This has also meant that data communication were built into the system using the 3rd Generation Partnership Project (3GPP).

CDMA: - Code/Call division multiple access (CDMA) describes a communication channel access principle that employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code). In communications technology, there are only three domains that can allow multiplexing to be implemented for more efficient use of the available channel bandwidth and these domains are known as time, frequency and space. CDMA divides the access in signal space. By contrast, time division multiple access (TDMA) divides access by time, while frequency-division multiple access (FDMA) divides it by frequency. CDMA is a form of "spread-spectrum" signaling, since the modulated coded signal has a much higher bandwidth than the data being communicated.

Basically Medium Frequency is based on Tower to Tower links.

3) High Frequency: In High Frequency the devices used are Satellite & VSAT.

Satellite:-In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavor. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

VSAT: - A Very Small Aperture Terminal (VSAT) is a two-way satellite ground station with a dish antenna that is smaller than 3 meters (most VSAT antennas range from 75 cm to 1.2 m). VSAT data rates typically range from narrowband up to 4 Mbit/s. VSATs access satellites in geosynchronous orbit

to relay data from small remote earth stations (terminals) to other terminals (in mesh configurations) or master earth station "hubs" (in star configurations).

By Light: - Light is a common way of networking.

An optical fiber cable is a cable containing one or more optical fibers. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed.

Design

In practical fibers, the cladding is usually coated with a tough resin buffer layer, which may be further surrounded by a jacket layer, usually plastic. These layers add strength to the fiber but do not contribute to its optical wave guide properties. Rigid fiber assemblies sometimes put light-absorbing ("dark") glass between the fibers, to prevent light that leaks out of one fiber from entering another. This reduces cross-talk between the fibers, or reduces flare in fiber bundle imaging applications.[1]

For indoor applications, the jacketed fiber is generally enclosed, with a bundle of flexible fibrous polymer strength members like Aramid (e.g. Twaron or Kevlar), in a lightweight plastic cover to form a simple cable. Each end of the cable may be terminated with a specialized optical fiber connector to allow it to be easily connected and disconnected from transmitting and receiving equipment.

For use in more strenuous environments, a much more robust cable construction is required. In loose-tube construction the fiber is laid helically into semi-rigid tubes, allowing the cable to stretch without stretching the fiber itself. This protects the fiber from tension during laying and due to temperature changes. Alternatively the fiber may be embedded in a heavy polymer jacket, commonly called "tight buffer" construction. These fiber units are commonly bundled with additional steel strength members, again with a helical twist to allow for stretching.

A critical concern in cabling is to protect the fiber from contamination by water, because its component hydrogen (hydronium) and hydroxyl ions can diffuse into the fiber, reducing the fiber's strength and increasing the optical attenuation. Water is kept out of the cable by use of solid barriers such as copper tubes, water-repellant jelly, or more recently water absorbing powder, surrounding the fiber.

Finally, the cable may be armored to protect it from environmental hazards, such as construction work or gnawing animals. Undersea cables are more heavily armored in their near-shore portions to protect them from boat anchors, fishing gear, and even sharks, which

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

may be attracted to the electrical power signals that are carried to power amplifiers or repeaters in the cable.

Modern fiber cables can contain up to a thousand fibers in a single cable, so the performance of optical networks easily accommodates even today's demands for bandwidth on a point-to-point

basis. However, unused point-to-point potential bandwidth does not translate to operating profits, and it is estimated that no more than 1% of the optical fiber buried in recent years is actually 'lit'.

Modern cables come in a wide variety of sheathings and armor, designed for applications such as direct burial in trenches, dual use as power lines [1], installation in conduit, lashing to aerial telephone poles, submarine installation, or insertion in paved streets. In recent years the cost of small fiber-count pole-mounted cables has greatly decreased due to the high Japanese and South Korean demand for fiber to the home (FTTH) installations.

Cable types

OFC: Optical fiber, conductive OFN: Optical fiber, nonconductive OFCG: Optical fiber, conductive, general use OFNG: Optical fiber, nonconductive, general use OFCP: Optical fiber, conductive, plenum OFNP: Optical fiber, nonconductive, plenum OFCR: Optical fiber, conductive, riser OFNR: Optical fiber, nonconductive, riser OPGW: Optical fiber composite overhead ground wire

Color coding

Individual optical fibers in a fiber-optic cable are often distinguished from one another by color-coded jackets or buffers on each fiber. The identification scheme used in Corning Cable Systems fiber-optic cables is based on EIA/TIA-598, "Optical Fiber Cable Color Coding." EIA/TIA-598 defines identification schemes for fibers, buffered fibers, fiber units, and groups of fiber units within outside plant and premises optical fiber cables. This standard allows for fiber units to be identified by means of a printed legend. This method can be used for identification of fiber ribbons and fiber subunits. The legend will contain a corresponding printed numerical position number and/or color for use in identification.

An optical fiber (or fibre) is a glass or plastic fiber designed to guide light along its length. Fiber optics is the overlap of applied science and engineering concerned with the design and application of optical fibers. Optical fibers are widely used in fiber-optic communication, which permits transmission over longer distances and at higher data rates than other forms of communications. Fibers are used instead of metal wires because signals travel along them with less loss, and they are immune to electromagnetic interference. Optical fibers are also used to form sensors, and in a variety of other applications.

Light is kept in the "core" of the optical fiber by total internal reflection. This causes the fiber to act as a waveguide. Fibers which support many propagation paths or transverse modes are called multimode fibers (MMF). Fibers which support only a single mode are called singlemode fibers (SMF). Multimode fibers generally have a large-diameter core, and

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

are used for short-distance communication links or for applications where high power must be transmitted. Singlemode fibers are used for most communication links longer than 200 meters.Joining lengths of optical fiber is more complex than joining electrical wire or cable. The ends of the fibers must be carefully cleaved, and then spliced together either mechanically or by fusing them together with an electric arc. Special connectors are used to make removable connections.

History

The light-guiding principle behind optical fibers was first demonstrated by Daniel Colladon and Jaques Babinet in the 1840s, with Irish inventor John Tyndall offering public displays using water-fountains ten years later.[1] Practical applications, such as close internal illumination during dentistry, appeared early in the twentieth century. Image transmission through tubes was demonstrated independently by the radio experimenter Clarence Hansell and the television pioneer John Logie Baird in the 1920s. The principle was first used for internal medical examinations by Heinrich Lamm in the following decade. In 1952 physicist Narinder Singh Kapany conducted experiments that led to the invention of optical fiber, based on Tyndall's earlier studies; modern optical fibers, where the glass fiber is coated with a transparent cladding to offer a more suitable refractive index, appeared later in the decade.[1] Development then focused on fiber bundles for image transmission. The first fiber optic semi-flexible gastroscope was patented by Basil Hirschowitz, C. Wilbur Peters, and Lawrence E. Curtiss, researchers at the University of Michigan, in 1956. In the process of developing the gastroscope, Curtiss produced the first glass-clad fibers; previous optical fibers had relied on air or impractical oils and waxes as the low-index cladding material. A variety of other image transmission applications soon followed.

In 1965, Charles K. Kao and George A. Hockham of the British company Standard Telephones and Cables were the first to suggest that attenuation of contemporary fibers was caused by impurities, which could be removed, rather than fundamental physical effects such as scattering. They speculated that optical fiber could be a practical medium for communication, if the attenuation could be reduced below 20 dB per kilometer.[2] This attenuation level was first achieved in 1970, by researchers Robert D. Maurer, Donald Keck, Peter C. Schultz, and Frank Zimar working for American glass maker Corning Glass Works, now Corning Inc. They demonstrated a fiber with 17 dB optic attenuation per kilometer by doping silica glass with titanium. A few years later they produced a fiber with only 4 db/km using germanium oxide as the core dopant. Such low attenuations ushered in optical fiber telecommunications and enabled the Internet. Nowadays, attenuations in optical cables are far less than those in electrical copper cables, leading to long-haul fiber connections with repeater distances of 500 - 800 km.

The erbium-doped fiber amplifier, which reduced the cost of long-distance fiber systems by reducing or even in many cases eliminating the need for optical-electrical-optical repeaters, was co-developed by teams led by David Payne of the University of Southampton, and Emmanuel Desurvire at Bell Laboratories in 1986. The more robust optical fiber commonly used today utilizes glass for both core and sheath and is therefore less prone to aging processes. It was invented by Gerhard Bernsee in 1973 by Schott Glass in Germany.

In 1991, the emerging field of photonic crystals led to the development of photonic crystal fiber (Science (2003), vol 299, page 358), which guides light by means of diffraction from a periodic structure, rather than total internal reflection. The first photonic crystal fibers became commercially available in 1996 [2]. Photonic crystal fibers can be designed to carry higher power than conventional fiber, and their wavelength dependent properties can be manipulated to improve their performance in certain applications.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Applications

Optical fiber communicationMain article: Fiber-optic communication

Optical fiber can be used as a medium for telecommunication and networking because it is flexible and can be bundled as cables. It is especially advantageous for long-distance communications, because light propagates through the fiber with little attenuation compared to electrical cables. This allows long distances to be spanned with few repeaters. Additionally, the light signals propagating in the fiber can be modulated at rates as high as 40 Gb/s [3], and each fiber can carry many independent channels, each by a different wavelength of light (wavelength-division multiplexing). Over short distances, such as networking within a building, fiber saves space in cable ducts because

a single fiber can carry much more data than a single electrical cable. Fiber is also immune to electrical interference, which prevents cross-talk between signals in different cables and pickup of environmental noise. Also, wiretapping is more difficult compared to electrical connections, and there are concentric dual core fibers that are said to be tap-proof. Because they are non-electrical, fiber cables can bridge very high electrical potential differences and can be used in environments where explosive fumes are present, without danger of ignition.

Although fibers can be made out of transparent plastic, glass, or a combination of the two, the fibers used in long-distance telecommunications applications are always glass, because of the lower optical attenuation. Both multi-mode and single-mode fibers are used in communications, with multi-mode fiber used mostly for short distances (up to 500 m), and single-mode fiber used for longer distance links. Because of the tighter tolerances required to couple light into and between single-mode fibers (core diameter about 10 micrometers), single-mode transmitters, receivers, amplifiers and other components are generally more expensive than multi-mode components.

Fiber optic sensors

Optical fibers can be used as sensors to measure strain, temperature, pressure and other parameters. The small size and the fact that no electrical power is needed at the remote location gives the fiber optic sensor advantages to conventional electrical sensor in certain applications.

Optical fibers are used as hydrophones for seismic or SONAR applications. Hydrophone systems with more than 100 sensors per fiber cable have been developed. Hydrophone sensor systems are used by the oil industry as well as a few countries' navies. Both bottom mounted hydrophone arrays and towed streamer systems are in use. The German company Sennheiser developed a microphone working with a laser and optical fibers.

Optical fiber sensors for temperature and pressure have been developed for downhole measurement in oil wells. The fiber optic sensor is well suited for this environment as it is functioning at temperatures too high for semiconductor sensors (Distributed Temperature Sensing

Another use of the optical fiber as a sensor is the optical gyroscope which is in use in the Boeing 767 and in some car models (for navigation purposes) and the use in Hydrogen microsensors.Fiber-optic sensors have been developed to measure co-located temperature and strain simultaneously with very high accuracy. This is particularly useful to acquire information from small complex structures.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Other uses of optical fibers

A frisbee illuminated by fiber optics

Fibers are widely used in illumination applications. They are used as light guides in medical and other applications where bright light needs to be shone on a target without a clear line-of-sight path. In some buildings, optical fibers are used to route sunlight from the roof to other parts of the building (see non-imaging optics). Optical fiber illumination is also used for decorative applications, including signs, art, and artificial Christmas trees. Swarovski boutiques use optical fibers to illuminate their crystal showcases from many different angles while only employing one light source. Optical fiber is an intrinsic part of the light-transmitting concrete building product, LiTraCon.

A fiber-optic Christmas Tree

Optical fiber is also used in imaging optics. A coherent bundle of fibers is used, sometimes along with lenses, for a long, thin imaging device called an endoscope, which is used to view objects through a small hole. Medical endoscopes are used for minimally invasive exploratory or surgical procedures (endoscopy). Industrial endoscopes (see fiberscope or borescope) are used for inspecting anything hard to reach, such as jet engine interiors.

An optical fiber doped with certain rare-earth elements such as erbium can be used as the gain medium of a laser or optical amplifier. Rare-earth doped optical fibers can be used to provide signal amplification by splicing a short section of doped fiber into a regular (undoped) optical fiber line. The doped fiber is optically pumped with a second laser wavelength that is coupled into the line in addition to the signal wave. Both wavelengths of light are transmitted through the doped fiber, which transfers energy from the second pump wavelength to the signal wave. The process that causes the amplification is stimulated emission.

Optical fibers doped with a wavelength shifter are used to collect scintillation light in physics

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

experiments.

Optical fiber can be used to supply a low level of power (around one watt) to electronics situated in a difficult electrical environment. Examples of this are electronics in high-powered antenna elements and measurement devices used in high voltage transmission equipment.

Principle of operation

An optical fiber is a cylindrical dielectric waveguide that transmits light along its axis, by the process of total internal reflection. The fiber consists of a core surrounded by a cladding layer. To confine the optical signal in the core, the refractive index of the core must be greater than that of the cladding. The boundary between the core and cladding may either be abrupt, in step-index fiber, or gradual, in graded-index fiber.

Multimode fiber

The propagation of light through a multi-mode optical fiber.

Fiber with large (greater than 10 μm) core diameter may be analyzed by geometric optics. Such fiber is called multimode fiber, from the electromagnetic analysis (see below). In a step-index multimode fiber, rays of light are guided along the fiber core by total internal reflection. Rays that meet the core-cladding boundary at a high angle (measured relative to a line normal to the boundary), greater than the critical angle for this boundary, are completely reflected. The critical angle (minimum angle for total internal reflection) is determined by the difference in index of refraction between the core and cladding materials. Rays that meet the boundary at a low angle are refracted from the core into the cladding, and do not convey light and hence information along the fiber. The critical angle determines the acceptance angle of the fiber, often reported as a numerical aperture. A high numerical aperture allows light to propagate down the fiber in rays both close to the axis and at various angles, allowing efficient coupling of light into the fiber. However, this high numerical aperture increases the amount of dispersion as rays at different angles have different path lengths and therefore take different times to traverse the fiber. A low numerical aperture may therefore be desirable.

Optical fiber types.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

In graded-index fiber, the index of refraction in the core decreases continuously between the axis and the cladding. This causes light rays to bend smoothly as they approach the cladding, rather than reflecting abruptly from the core-cladding boundary. The resulting curved paths reduce multi-path dispersion because high angle rays pass more through the lower-index periphery of the core, rather than the high-index center. The index profile is chosen to minimize the difference in axial propagation speeds of the various rays in the fiber. This ideal index profile is very close to a parabolic relationship between the index and the distance from the axis.

Singlemode fiber

A typical single-mode optical fiber, showing diameters of the component layers.

Fiber with a core diameter less than about ten times the wavelength of the propagating light cannot be modeled using geometric optics. Instead, it must be analyzed as an electromagnetic structure, by solution of Maxwell's equations as reduced to the electromagnetic wave equation. The electromagnetic analysis may also be required to understand behaviors such as speckle that occur when coherent light propagates in multi-mode fiber. As an optical waveguide, the fiber supports one or more confined transverse modes by which light can propagate along the fiber. Fiber supporting only one mode is called single-mode or mono-mode fiber. The behavior of larger-core multimode fiber can also be modeled using the wave equation, which shows that such fiber supports more than one mode of propagation (hence the name). The results of such modeling of multi-mode fiber approximately agree with the predictions of geometric optics, if the fiber core is large enough to support more than a few modes.

The waveguide analysis shows that the light energy in the fiber is not completely confined in the core. Instead, especially in single-mode fibers, a significant fraction of the energy in the bound mode travels in the cladding as an evanescent wave.

The most common type of single-mode fiber has a core diameter of 8 to 10 μm and is designed for use in the near infrared. The mode structure depends on the wavelength of the light used, so that this fiber actually supports a small number of additional modes at visible wavelengths. Multi-mode fiber, by comparison, is manufactured with core diameters as small as 50 microns and as large as hundreds of microns.

Topic 2 Types of NetworkThere are two types of Network:-

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved 1) Simplex Network2) Duplex Network

1) Simplex Network: - Simplex Network is that network in which Signals are running one way Like TV & Radio. We can only receive TV signals but we cannot forward our voice or our photo through TV or Radio. One sided signals are Simplex Network.

2) Duplex Network: - Duplex network is that network in which signals are running on both ways like Mobile Phone. We can Send & receive messages at a same time.

Duplex Network is of two types:-1) Full Duplex Network2) Half Duplex Network

1) Full Duplex Network: - Example of Full Duplex Network is Mobile.

2) Half Duplex Network: - Example of Half Duplex Network is Walkie-Talkie.

Topic 3 Types of Cabling

1) Straight Cabling2) Cross Cabling3) Roll-over Cabling

1) Straight Cabling:-

Pin ID side A side B

1 orange-white orange-white

2 orange orange

3 green-white green-white

4 blue blue

5 blue-white blue-white

6 green green

7 brown-white brown-white

8 brown brown

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

2) Cross Cabling:-

Pin ID side A side B

1 orange-white green-white

2 orange green

3 green-white orange-white

4 blue blue

5 blue-white blue-white

6 green orange

7 brown-white brown-white

8 brown brown

3) Roll-Over cable:-

Pin ID side A side B

1 orange-white brown

2 orange brown-white

3 green-white green

4 blue blue-white

5 blue-white blue

6 green green-white

7 brown-white orange

8 brown orange-white

Topic 4 Making a Cable

You need a special plier, RJ45 connectors, UTP cables, and a cutter.

Making CableFollow the steps below.

1) Remove the outmost vinyl shield for 12mm at one end of the cable (we call this side A-side). 2) Arrange the metal wires in parallel (refer the each section's wire arrangement table).

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

3) Don't remove the shiled of each metal line. 4) Insert the metal wires into RJ45 connector on keeping the metal wire arrangement. 5) Set the RJ45 connector (with the cable) on the plier, and squeeze it tightly. 6) Make the other side of the cable (we call this side B-side) in the same way. 7) After you made it, you don't need to take care of the direction of the cable. (Any cable in this

page is directionless --- that means you can set either end of the cable to either device.)

How to see the wire arrangementtake the UTP cable with your left hand and a RJ45 connector with your righyt hand. Hold the RJ45 connector in the way you can see the contact metal face (the horn (?) of the RJ45 connector comes invisible from you now). At this moment, I call Pin-number 1, 2, 3, from the upper side to the bottom side. This is the same at both side of the cable. There are several different color set of UTP cables, so if the cable you have is not same as the one below, please re-map the color in a good way...

Topic 5 ProtocolsA Protocol is a set of guidelines or rules.Internet protocols

Internet protocols are rules that help in governing an operation on the internet and communications over it. There are many types such as FTP, HTTP, and TCP/IP.Protocol used to other device understand about other languages to accept data.Protocols are of two types:-

1) Routable Protocols 2) Non-Routable Protocols

1) Routable Protocols :- A routing protocol is a protocol that specifies how routers communicate with each other to disseminate information that allows them to select routes between any two nodes on a network. Typically, each router has a priori knowledge only of its immediate neighbors. A routing protocol shares this information so that routers have knowledge of the network topology at large. For a discussion of the concepts behind routing protocols, see: Routing.

The term routing protocol may refer more specifically to a protocol operating at Layer 3 of the OSI model which similarly disseminates topology information between routers.

Many routing protocols used in the public Internet are defined in documents called RFCs.

There are three major types of routing protocols, some with variants: link-state routing protocols, path vector protocols and distance vector routing protocols.

The specific characteristics of routing protocols include the manner in which they either prevent routing loops from forming or break routing loops if they do form, and the manner in which they determine preferred routes from a sequence of hop costs and other preference

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

factors.TCP/IP (Transmission Control Protocol) (Microsoft) / IPX/SPX (Novell)

2) Non-Routable Protocols: - A communications protocol that contains only a device address and not a network address. It does not incorporate an addressing scheme for sending data from one network to another. Examples of non-routable protocols are NetBIOS and DEC's LAT protocols. Contrast with routable protocol. Net Buze (Microsoft) / Nwlink (Novell)

Topic 6 OSI Layers

The International Organization for standardization (ISO) began developing the open system Interconnection (OSI) reference model in 1977.It has since become the most widely accepted model for understanding network communication. In order for computers to communicate there must be accepted rules of communication. For communication to take place on a network composed of a variety of network devices, these rules must be clearly defined.

The OSI model simply defines which tasks need to be done and which protocols will handle those tasks at each of the seven layers of the model.

The 7 Layers of the OSI Model

The OSI, or Open System Interconnection, model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next, starting at the application layer in one station, and proceeding to the bottom layer, the channel to the next station and back up the hierarchy.

Application(Layer 7)

This layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services. Telnet and FTP are applications that exist entirely in the application level. Tiered application architectures are part of this layer.

Presentation(Layer 6)

This layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer

works to transform data into the form that the application layer can accept. This layer formats and encrypts data to be sent across a network, providing freedom from compatibility problems. It is sometimes called the syntax layer.

Session(Layer 5)

This layer establishes, manages and terminates connections between applications. The session layer sets up, coordinates, and terminates conversations, exchanges, and dialogues between the applications at each end. It deals with session and connection coordination.

Transport(Layer 4)

This layer provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer.

Network(Layer 3)

This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing.

Data Link(Layer 2)

At this layer, data packets are encoded and decoded into bits. It furnishes transmission protocol knowledge and management and handles errors in the physical layer, flow control and frame synchronization. The data link layer is divided into two sub layers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sub layer controls how a computer on the network gains access to the data and permission to transmit it. The LLC layer controls frame synchronization, flow control and error checking.

Physical(Layer 1)

This layer conveys the bit stream - electrical impulse, light or radio signal -- through the network at the electrical and mechanical level. It provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects. Fast Ethernet, RS232, and ATM are protocols with physical layer components.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights

Example of OSI Layer

Application-Encoding & Decoding of data format.Presentation-Session- Pack sizing & error correctionTransport- Create & maintain a virtual source to destination.Network-RoutingDatalink- Divide data packets into chunks.Physical- Bits & Bytes.Topic 7 Encapsulation & DOD Model

Encapsulation: - Is the process in which additional instructions are added to the data packets, so that it can transmit across the network with modification. OREditing the data through data transferring. This process is called encapsulation or DOD (Department of defence) or OSI (Open System International).

Application Layer Upper LayerPresentation LayerSession Layer HTTP, FTP, SMTP, POP3Transport Layer Host to host Layer + TCP Layer (TCP, UDP, ICMP)Network Layer Lower layer IP Layer (IP, RIP, IGRP, OSPF, FIGR)Data Layer Access layer/Bits & BytesPhysical layer

64 bit 48 bit 48 bit 24 bit 24 bit Preamble Source Destination SFD FCS MAC MAC Start Frame DATA File Check Address Address Delimator Sequence

0-1500 bit

HEADER DATA TRAILER

Topic 8 TCP/IP & IP Addressing

TCP/IP ver 4.0

255. 255. 255. 255

27 26 25 24 23 22 21 20128 64 32 16 8 4 2 1

=255 All 0 & 1 is treated as 1. 126

CLASS A1- 126 (IP) (0,1)

Subnet mask 255. 0.0.0

N/W Host 27 224

256 = 16777216

This class comes under American Reasons.

127 IP is loop back

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

CLASS B128-191 (IP) (1, 0)

27 26 25 24 23 22 21 20128 64 32 16 8 4 2 1 =255 191

Subnet mask 255.255. 0.0

N/W Host 214 216

= 65536

This class comes under Europe Reasons.

CLASS C192-223 (IP) (1,1,0)

27 26 25 24 23 22 21 20128 64 32 16 8 4 2 1 =255

Subnet mask 255.255.255. 0

N/W Host 221 28

= 256

This class comes under Asia Reasons.

CLASS D224-239 (IP)

For Multicasting Addressing

CLASS E240-255 (IP)

For Research

Class A -- NNNNNNNN.nnnnnnnn.nnnnnnnn.nnnnnnnn Class B -- NNNNNNNN. NNNNNNNN.nnnnnnnn.nnnnnnnn Class C -- NNNNNNNN. NNNNNNNN. NNNNNNNN.nnnnnnnn

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Class Leading bits

Start End Default Subnet Mask in dotted decimal

A (CIDR /8) 0 0.0.0.0 126.255.255.255 255.0.0.0

B (CIDR /16) 10 128.0.0.0 191.255.255.255 255.255.0.0

C (CIDR /24) 110 192.0.0.0 223.255.255.255 255.255.255.0

D 1110 224.0.0.0 239.255.255.255

E 1111 240.0.0.0 255.255.255.0

The 127.0.0.1 network is left out because it is designated for loop back and cannot be assigned to a network.

Class D multicasting

Class E reserved

IANA IP Addressing and Naming Authority

IP are of two types

1) Public IP2) Private IP

1) Public IP:-Public IP is Reserve/Internet IP.It is used for WAN.2) Private IP: - Private IP is Free/Intranet IP.It is used for LAN.

Private IP

A10.0.0.0 10.255.255.254 Subnet mask255.0.0.0

B172.16.0.0 172.31.255.254 Subnet mask255.255.0.0

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

C192.168.0.0 192.168.255.254 Subnet mask255.255.255.0 Topic 9 Topologies

There are 7 types of Topologies.

1) Bus Topology: - In the bus topology the server is at one end, and the client PCs (devices) are connected at different points or positions along the network. All signals pass through each of the devices. Each device has a unique identity and can recognize those signals intended for it. It is easy and simple to design and implement.

2) Star Topology:- This is a form of LAN architecture is which nodes on a network are connected to a common central hub or switch, and this is done by the use of dedicated links.The Star topology is now emerging as the most common network layout used today in LAN layout. Each workstation is connected point-to-point to a single central location.

3) Ring Topology:- This topology is a simple design and consists of a single cable that forms the main data path in the shape of a ring. Each device is connected to a closed loop of cable. Signals travel in one direction from one node to all other nodes around the loop.

4) Tree Topology:- The Tree topology is essentially a hybrid of the bus and star layouts. The basic topology is similar to that of a bus, with nodes connected in sequence to a linear central cable. But tree networks may have "branches" that contain multiple workstations that are connected point-to-point in a star-like pattern. Signals from a transmitting node travel the length of the medium and are received by all other nod

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

5) Star Wired Ring Topology:- A star-wired ring topology may appear (externally) to be the same as a star topology. Internally, the MAU (multistation access unit) of a star-wired ring contains wiring that allows information to pass from one device to another in a circle or ring (See fig. 3). The Token Ring protocol uses a star-wired ring topology.

6) Linear Bus Topology:- A linear bus topology consists of a main run of cable with a terminator at each end (See fig. 1). All nodes (file server, workstations, and peripherals) are connected to the linear cable. Ethernet and LocalTalk networks use a linear bus topology.

7) Mesh Topology:- Mesh networking is a way to route data, voice and instructions between nodes. It allows for continuous connections and reconfiguration around broken or blocked paths by "hopping" from node to node until the destination is reached. A mesh network whose nodes are all connected to each other is a fully connected network. Mesh networking is a subclass of mobile ad hoc networking (MANET).

Topic 10 Difference between Hub & Switch

HUB SWITCH 1) Shared Bandwidth 1) Provide full Bandwidth.2) Physical layer device 2) Datalink layer device.3) Single collision Domain 3) Multiple Collision Domain.4) Multiport repeater. 4) Forward & Filtering Decision.5) No VLAN (Virtual Lan) 5) VLan.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Hub & Switch

Hub: - A hub is a "unintelligent" broadcast device -- any packet entering any port is broadcast out on every port. Hubs do not manage any of the traffic that comes through their ports. Since every packet is constantly being sent out through every port, you end up with packet collisions, which greatly impede the smooth flow of traffic on your LAN. Provides Shared bandwidth. It is physical layer device. Single collision Domain. Multiport Repeater. No VLAN (Virtual LAN).

Switch:-A switch, on the other hand, isolates ports -- every received packet is sent out only to the port on which the target may be found (one caveat - if the proper port cannot be determined, then the switch will broadcast the packet to all ports). Essentially, a switch is a router, but one operating at the MAC level rather than the IP level. Since the switch is intelligently sending packets only where they need to go, and not everywhere willy-nilly, the performance speed of your network can be greatly increased. Provide Full bandwidth.Datalink layer Device. Multiple Collision Domains. Forward & Filtering Decision. VLAN available.

Topic 11 Difference between Switch & Router

Switch Router

1) Works on MAC address. 1) Works on IP address.

2) Single broadcast domain. 2) Multiple broadcast domain.

3) LAN Device. 3) WAN Device.

4) Data Link Layer Device. 4) Network Layer Device

Topic 12 Difference between Bridge & Switch

Bridge Switch

1) Maximum Support 16 port. 1) Support many ports.

2) It is an software part. 2) It is hardware based

Topic 13 Difference between Workgroup & Domain

Workgroup Domain

1) Local Users & Groups. 1) Global Users & Groups.

2) User have not assign network right. 2) User has right to network.

3) No Centralized authentication. 3) Centralized authentication.

4) Share level Permission. 4) Access level Permission.

5) Desktop level Security. 5) Full Security.

6) Local Profile of users. 6) Roaming Profile.

Topic 14 File Systems

In computing, a file system is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. File systems may use a storage device such as a hard disk or CD-ROM and involve maintaining the physical location of the files, they might

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

provide access to data on a file server by acting as clients for a network protocol (e.g., NFS, SMB, or 9P clients), or they may be virtual and exist only as an access method for virtual data (e.g. procfs).

More formally, a file system is a set of abstract data types that are implemented for the storage, hierarchical organization, manipulation, navigation, access, and retrieval of data. File systems share much in common with database technology, but it is debatable whether a file system can be classified as a special-purpose database (DBMS).

NTFS FAT32

(New Technology File System) (File Allocation Unit)

1) Partition Supports up to 2 T.B. 1) Partition Support 32 G.B.

2) Security Access level right. 2) No Security, Share level.

3) Encryption. 3) No-Encryption.

4) File & Folder level Compression. 4) No-Compression.

5) Disk Quota. 5) No-Disk-Quota.

Topic 15 Commands Of NetworkingPING:-Ping is the command which is used for check the connectivity between two devices.

Syntax: - ping 172.16.0.1 (Enter)Steps:- Start--- Run --- ping 172.16.0.1 (Enter)

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Ping Extensions

Ping 172.16.0.1 –t (Enter)If we make –t then ping goes regular it does stop after 3 reply.

If we want to check how many packets we have loss in ping then press ctrl+break on running ping command.

IPCONFIG:-IP config shows your local host IP address and gateway.

Syntax: - ipconfig (Enter)Steps:- Start--- Run --- cmd(Cmd refers to command prompt) --- ipconfig (Enter)

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

IPCONFIG ALL: - This command shows all the configuration about local host in the network. (Computer name, IP address, Mac address, DNS, gatewayand your domain/workgroup name and type of addressing.

Syntax: - ipconfig /all (Enter)Steps: - Start--- Run --- cmd (Cmd refers to command prompt) --- ipconfig /all (Enter)

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved ARP: - ARP (Address Resolution Protocol) command is used for check the local host cache memory to check within a short time period (2 minutes).How many devices are interact with this.

Syntax: - Arp -a (Enter)Steps: - Start--- Run --- cmd (Cmd refers to command prompt) --- arp -a (Enter)

HOSTNAME: - This command shows local host name in the network.

Or

NETNAME: - It runs in98.

Syntax: - hostname (Enter)Steps: - Start--- Run --- cmd (Cmd refers to command prompt) --- hostname (Enter)

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

NET VIEW: - This command is used to check how many computers are connected with your system (In a local domain).

Syntax: - net view (Enter)Steps: - Start--- Run --- cmd (Cmd refers to command prompt) --- net view (Enter)

WINIPCFG :- In 98 this command is used to check all the configuration. (IP address, Subnet mask, gateway, DNS etc).

To check RAM, Processor etc .There is a utility.

Start---Run---dxdiag (Enter) Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved

Topic 16 USER ACCOUNT MANAGEMENT

(Creating local user)CREATING USERS

Step 1 My Computer Right Click.Step 2 Click on Manage.Step 3 Click on Local users & Groups.Step 4 Click on users.

Copyright AMIT MALHOTRA MCSEBOOK 2007, All rights reserved Step 5 Right Click & Click on New user.

Step 6 Write username & Full name.Step 7 Click on the check box

User cannot change password. Password never expires.

Step 8 Click on Create.

Topic 17 Properties of USER ACCOUNT Step 1 My Computer Right Click.Step 2 Click on Manage.Step 3 Click on Local users & Groups.Step 4 Click on users.