Philadelphia University
Faculty of Engineering
Communication and Electronic
Engineering Department
Computer Networking
Dr. Mohammad Alhihi
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Basic Computer Network Concept:
communication
Network components
Devices
Media
Protocols
Message
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Devices
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Basic Computer Network Concept:
Devices
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Hup
Devices
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Switch
Devices
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Devices
router
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Media
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Cable type
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Cable type
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Segmentation 5,4,3 rule
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Segmentation 5,4,3 rule
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human protocols:
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 humans
all 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
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Protocols

a human protocol and a computer network protocol:
Hi
TCP connection
req.
Hi
TCP connection
reply.
Got the
time?
2:00
<file>
time
Q: Other human protocol?
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Message
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properties communication
 1 Fault Tolerance (Redundancy)
2
Security
 3 scalability
 4 Quality of services
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properties communication
1.Fault Tolerance (Redundancy)
The presence of more than an access point,
in the case of line failure connected to the
network to work at full efficiency
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properties communication
1.Fault Tolerance (Redundancy)
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properties communication
 2.Security
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properties communication
3. scalability
Design flexibility in network
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properties communication

4 Quality of services
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Communication over the network
1.Message
segmentation
Benefits segmentation on the network
1. More than one device sends with some
2. Sends missing packet only(Bandwidth )
3. Reduce the pressure on network
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Communication over the network

1.Message
Multiplexing
More than send the device at the same time
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Communication over the network
2.Devices
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Communication over the network
2.Devices
Network Access Devices
Connecting devices in a single network
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Communication over the network
 Inter
1.
2.
3.
network Devices
Connecting devices in Multiple networks
Identifies the error when it occurs
Identifies (PATH)
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Any
Question
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