1 Computer Networking Dr. Mohammad Alhihi Communication and Electronic Engineering Department...

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Computer NetworkingComputer NetworkingDr. Mohammad AlhihiDr. Mohammad Alhihi

Communication and Electronic Engineering Department

Philadelphia University Faculty of Engineering

communicationcommunication

Network componentsNetwork components

DevicesDevices

MediaMedia

ProtocolsProtocols

Message Message

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Basic Computer Network Concept:Basic Computer Network Concept:

DevicesDevices

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DevicesDevices

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Basic Computer Network Concept:Basic Computer Network Concept:

DevicesDevices

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Hup

DevicesDevices

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Switch

DevicesDevices

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router

MediaMedia

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Cable typeCable type

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Cable typeCable type

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Segmentation 5,4,3 ruleSegmentation 5,4,3 rule

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Segmentation 5,4,3 ruleSegmentation 5,4,3 rule

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ProtocolsProtocols

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human protocols:“what’s the time?”“I have a question”introductions

… specific mages sent… specific actions taken when mages received, or other events

network protocols:machines rather than humansall communication activity in Internet governed by protocols

protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt

ProtocolsProtocols aa human protocol and a computer network protocol: human protocol and a computer network protocol:

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Hi

Hi

Got thetime?2:00

TCP connection req.

TCP connectionreply.

<file>

time

Q: Other human protocol?

MessageMessage

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properties properties communicationcommunication

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11 Fault Tolerance (Redundancy)Fault Tolerance (Redundancy)

2 Security 2 Security 3 scalability 3 scalability 4 Quality of services 4 Quality of services

properties properties communicationcommunication

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1.Fault Tolerance (Redundancy)

The presence of more than an access The presence of more than an access point,point,

in the case of line failure connected in the case of line failure connected to the network to work at full to the network to work at full efficiencyefficiency

properties properties communicationcommunication

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1.Fault Tolerance (Redundancy)

properties properties communicationcommunication

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2.Security2.Security

properties properties communicationcommunication

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Design flexibility in network

3. scalability

properties properties communicationcommunication

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4 Quality of services 4 Quality of services

Communication over the Communication over the networknetwork

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1.Message

segmentation

Benefits segmentation on the network1. More than one device sends with some2. Sends missing packet only(Bandwidth )3. Reduce the pressure on network

Communication over the Communication over the networknetwork

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1.Message1.Message

MultiplexingMultiplexing

More than send the device at the same time

Communication over the Communication over the networknetwork

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2.Devices

Communication over the Communication over the networknetwork

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2.DevicesNetwork Access DevicesConnecting devices in a single network

Communication over the Communication over the networknetwork

Inter network Devices Inter network Devices 1.1. Connecting devices in Multiple Connecting devices in Multiple

networksnetworks

2.2. Identifies the error when it occursIdentifies the error when it occurs

3.3. Identifies (PATH)Identifies (PATH)

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Any Any

QuestionQuestion