1. Naresh Kumar PGT CS KV CRPF Avadi
Computer Network
Naresh Kumar
PGT CS
KV CRPF Avadi

2. Computer Network – Naresh Kumar
Why Computer Network ???
Stand alone Computer ….
An interconnected system of things or people-Network
FOR WHAT ???
Computer Network – Naresh Kumar

3. Something interesting from Computer Network ???
Resource Sharing
Reliability
No distance
Cost Reduction
Efficient
Computer Network – Naresh Kumar

4. Computer Network – Naresh Kumar
Internet
History
?? Developed by ARPA in 1969
?? ARPANET for academic research
?? Grow up explosively in 1985
?? MILNET for American military
DARPA research program in 1973
Connect a variety of computer networks so that they could function as a single, reliable network
Computer Network – Naresh Kumar

5. Computer Network – Naresh Kumar
Switching Data
Data units must be switched through the various intermediate devices until they are delivered to their destination…
Computer Network – Naresh Kumar

6. Communication network
Circuit Switch -Telephone network
Computer Network – Naresh Kumar

7. Computer Network – Naresh Kumar
Data network ??
Packet Switching –LAN, WAN, MAN
Computer Network – Naresh Kumar

8. Data Communication Terminologies
Channel-It is the medium used to carry information or data from one point to another.
Baud-It is the measurement for the information carrying capacity of a communication channel. It is synonymous with bps(bits per second).
Bandwidth-It refers to the difference between the highest and lowest frequencies of a transmission channel.
Data Transfer Rate- The speed of data transfer from one charnel to another.
Computer Network – Naresh Kumar

9. Computer Network – Naresh Kumar
Transmission Media
Computer Network – Naresh Kumar

10. Computer Network – Naresh Kumar
Twisted Pair Cable
Computer Network – Naresh Kumar

11. Computer Network – Naresh Kumar
Coaxial Cable
Computer Network – Naresh Kumar

12. Computer Network – Naresh Kumar
Optical Fiber
Computer Network – Naresh Kumar

13. Computer Network – Naresh Kumar
Network Devices
Computer Network – Naresh Kumar

14. Computer Network – Naresh Kumar
Modem
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15. Computer Network – Naresh Kumar
RJ45 Connector
Computer Network – Naresh Kumar

16. Computer Network – Naresh Kumar
Router
Computer Network – Naresh Kumar

17. Ethernet Card, Hub & Switch
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18. Computer Network – Naresh Kumar
Gateway
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19. Computer Network – Naresh Kumar
Topologies
Computer Network – Naresh Kumar

20. Computer Network – Naresh Kumar
BUS Topology
Computer Network – Naresh Kumar

21. Computer Network – Naresh Kumar
Star Topology
Computer Network – Naresh Kumar

22. Computer Network – Naresh Kumar
Tree Topology
Computer Network – Naresh Kumar

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Mash Topology
Computer Network – Naresh Kumar

24. Computer Network – Naresh Kumar
LAN
Computer Network – Naresh Kumar

25. Computer Network – Naresh Kumar
WAN
Computer Network – Naresh Kumar

26. Computer Network – Naresh Kumar
MAN
Computer Network – Naresh Kumar

27. OSI Model and Protocols
Computer Network – Naresh Kumar

28. Computer Network – Naresh Kumar
TCP/IP Suite
Computer Network – Naresh Kumar

29. Computer Network – Naresh Kumar
IP (Internet Protocol) ??
LAN-to-LAN, Node-to-Node transmission
?? IP Address ( )
?? Network layer
?? TCP (Transmission Control Protocol)
?? End-to-End Communication
?? Reliable data transmission
?? Transport layer
Computer Network – Naresh Kumar

30. Computer Network – Naresh Kumar
Thank You…
Computer Network – Naresh Kumar