DATA COMMUNICATION Lecture-45.

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Presentation transcript:

DATA COMMUNICATION Lecture-45

Recap of Lecture 44 Token Ring FDDI Comparison of LAN Architectures

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

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

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

Connecting devices

Connecting devices

Repeaters

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

Repeaters

Repeaters

Bridges

Bridges Bridges can divide a large network into smaller segments

Bridges

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

Bridges

Routers

Routers Router relay packets among multiple interconnection networks

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

TCP/IP

TCP/IP and OSI

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)

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

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

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