1.0 INTRODUCTION

The purpose of a computer network is allow to moving information from one point to another inside

the network. The information could be stored on a device such as a personal computer in the network, it

could be generated lived outside the network, such as speech, or could be generated by a process on

another piece of information such as automatic sales transactions at the end of business day. The device

does not necessarily have to be a computer, it could be a hard disk, a camera or even a printer on the

network. Due to a large variety of information to be moved, and due to the fact that each type of

information has its own conditions for intelligibility, the computer network has evolved into a highly

complex system. Specialized knowledge from many areas of science and engineering goes into the

design of networks. It is practically impossible for a single area of science or engineering to be entirely

responsible for the design of all the components. Therefore, the study of computer networks braches into

many areas as we go up from fundamentals to the advance levels.

2.0 MOBILE COMPUTING

2.1 DEFINITION

Using a computing device while in transit. Mobile computing implies wireles transmission, but wireless

transmission does not necessarily imply mobile computing. Fixed wireless applications use satellites,

radio systems and lasers to transmit between permanent objects such as buildings and towers.

2.2 SPECIFICATION, SERVICES AND FREQUENCIES OF MOBILE COMPUTING

MODEL NAME : HTC DESIRE

SPECIFICATION

Users Interface

Android 2.2

Released March 2010

Size and weight

119 x 60 x 11.9 mm

135 g

Display

AMOLED Capative touchscreen

16 Million colours

480 x 800 pixels

3.7 inches

Battery

Li-lon

1400 mAh

Memory

Internal : 576 MB RAM; 512 MB ROM

MicroSD card slot

Up to 32GB, 4GB Included

Main Camera

Geo-tagging

5MP (2592 x 1944 pixels)

Autofocus, LED Flash

WVGA (800x480 pixels) @ 15fps

SERVICES

WLAN Wi-Fi 802.11 b/g

microUSB v2.0 connector

3.5 mm audio jack

Stereo FM radio with RDS

Data transfer via Bluetooth v2.1 with A2DP

A-GPS support

Internet surfing

MP3/AAC+/WAV/WMA9 player

MP4/H.263/H.264/WMV9 player

FREQUENCIES

2G Network GSM 850 / 900 / 1800 / 1900

3G Network HSDPA 900 / 2100

3.0 INTERNET TECHNOLOGY AND SERVICES

3.1 VoIP ( Voice Internet Protocol )

is a general term for a family of transmission

technologies for delivery of voice communications

over IP (internet protocol) networks such as the

Internet or other packet-switched networks.

Other terms frequently encountered and

synonymous with VoIP are IP telephony,

Internet telephony, voice over broadband (VoBB),

broadband telephony, and broadband phone. Example of residential network including VoIP

3.2 BLOG

A blog (short for weblog) is a personal online journal that is frequently updated and intended for general

public consumption. Blogs are defined by their format: a series of entries posted to a single page in

reverse-chronological order. Blogs generally

represent the personality of the author or reflect

the purpose of the Website that hosts the blog.

Topics sometimes include brief philosophical

musings, commentary on Internet and other

social issues, and links to that support a point

being made on a post. Examples o a BLOG

4.0 TYPES OF NETWORK

4.1 PAN ( Personal Area Network )

A personal area network (PAN) is a computer network used for communication among computer

devices, including telephones and personal digital assistants, in proximity to an individual's body.

The devices may or may not belong to the

person in question. The reach of a PAN is

typically a few meters. PANs can be used for

communication among the personal devices

themselves (intrapersonal communication),

or for connecting to a higher level network

and the Internet (an uplink).Personal area

networks may be wired with computer buses

such as USB and FireWire.

4.2 VPN ( Virtual Private Network )

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure,

such as the Internet, to provide remote offices or individual users with secure access to their

organization's network. It aims

to avoid an expensive system of owned or

leased lines that can be used by only one

organization. The goal of a VPN is to

provide the organization with the same

secure capabilities, but at a much lower

cost.

4.3 WLAN (Wireless Local Area Network)

A Wireless Local Area Network (WLAN) links two or more devices using some wireless distribution

method (typically spread-spectrum or OFDM radio), and usually providing a connection through an

access point to the wider internet. This gives users the

mobility to move around within a local coverage area and

still be connected to the network.

4.4 WIMAX (Worldwide Interoperability for Microwave Access)

WiMAX (Worldwide Interoperability for

Microwave Access) is a telecommunications

protocol that provides fixed and fully

mobile internet access. The current

WiMAX revision provides up to

40 Mbit/s with the IEEE 802.16m

update expected offer up to 1 Gbit/s fixed

speeds. The name "WiMAX"

was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability

of the standard. The forum describes WiMAX as "a standards-based technology enabling the delivery of last mile

wireless broadband access as an alternative to cable and DSL"

5.0 CONCLUSION

We can conclude that computer networks and communication makes our life easier to communicate

with each other and the world using the computer .

REFERENCES

Majalah PC Julai 10 #163 Page 9

http://www.gsmarena.com/sony_ericsson_satio_%28idou%29-2683.php

http://en.wikipedia.org/wiki/Voice_over_Internet_Protocol

http://searchwindevelopment.techtarget.com/sDefinition/0,,sid8_gci214616,00.html

http://aazizmy.blogspot.com/2009/01/form4-1121-usage-of-ict-in-everyday.html

http://en.wikipedia.org/wiki/Personal_area_network

http://en.wikipedia.org/wiki/Virtual_private_network

http://en.wikipedia.org/wiki/Wireless_LAN

http://en.wikipedia.org/wiki/WiMAX

http://www.google.com/imghp

COMPUTER NETWORKS AND COMMUNICATIONS

(WRITTEN ASSIGNMENT FORMAT)

LATEST DEVELOPMENT IN NETWORK AND COMMUNICATIONS

NAME : EQLIMA ERNIE SHAFIQA BT MOHD SUFFIAN

CLASS : 4 SERVER

I/C NO : 941119 – 14 – 6168

TEACHER’S NAME : PN NORHASHIMA

SCHOOL : SMK SUNGAI PUSU

CONTENT PAGE

1.0 INTRODUCTION

2.0 MOBILE COMPUTING

2.1 DEFINITION

2.2 SPECIFICATION, SERVICES, AND

FREQUENCIES OF MOBILE COMPUTING

3.0 INTERNET TECHNOLOGY AND SERVICES

3.1 VoIP ( Voice Internet Protocol )

3.2 BLOG

4.0 TYPES OF NETWORK

4.1 PAN ( Personal Area Network )

4.2 VPN ( Virtual Private Network )

4.3 WLAN (Wireless Local Area Network)

4.4 WIMAX (Worldwide Interoperability for

Microwave Access)

5.0 CONCLUSION

REFERENCES