1. DATA COMMUNICATION
Lecture-45

2. Recap of Lecture 44
Token Ring
FDDI
Comparison of LAN Architectures

3. Overview of Lecture 45 Internetwork Connecting Devices Repeaters
Bridges
Routers
TCP/IP Protocol Suite

4. Internet
An internet is a generic term used to mean an interconnection of individual networks
To create an internet, we need networking devices called routers and gateways

5. Internet An internet is different from the Internet
Internet is the name of a specific worldwide network

6. Connecting devices

7. Connecting devices

8. Repeaters

9. Repeaters
A repeater allows us to extend only the physical length of a network
Repeater is a regenerator, not an amplifier

10. Repeaters

11. Repeaters

12. Bridges

13. Bridges
Bridges can divide a large network into smaller segments

14. Bridges

15. Bridges When a frame enters a bridge, the bridge:
not only regenerates the signal
but check the address of the destination and forwards the new copy only to the segment to which the address belongs

16. Bridges

17. Routers

18. Routers
Router relay packets among multiple interconnection networks

19. TCP/IP Transmission Control Protocol/ Internet Protocol 1969
ARPA(Advanced Research Project Agency) net

20. TCP/IP

21. TCP/IP and OSI

22. TCP/IP Protocols Network Layer IP (Internetworking Protocol )
ARP(Address Resolution Protocol)
RARP(Reverse Address Resolution Protocol)
ICMP(Internet Control Message Protocol)
IGMP(Internet Group Message Protocol)

23. TCP/IP Protocols Transport Layer TCP (Transmission Control Protocol)
UDP (User Datagram Protocol)

24. Summary Internetwork Connecting Devices Repeaters Bridges Routers
TCP/IP Protocol Suite

25. Suggested Reading Section 21.1, 21.2, 21.3, 24.1, 24.2,
“Data Communications and Networking” 2nd Edition by Behrouz A. Forouzan