Data Communications and Networking: Ch20
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Transcript of Data Communications and Networking: Ch20
20.1
Chapter 20
Network Layer:Internet Protocol
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
20.2
20-1 INTERNETWORKING20-1 INTERNETWORKING
In this section, we discuss internetworking, connecting In this section, we discuss internetworking, connecting networks together to make an internetwork or an networks together to make an internetwork or an internet. internet.
Need for Network LayerInternet as a Datagram NetworkInternet as a Connectionless Network
Topics discussed in this section:Topics discussed in this section:
20.7
Switching at the network layer in the Internet uses the datagram approach to
packet switching.
Note
20.9
20-2 IPv420-2 IPv4
The Internet Protocol version 4 (The Internet Protocol version 4 (IPv4IPv4) is the delivery ) is the delivery mechanism used by the TCP/IP protocols.mechanism used by the TCP/IP protocols.
DatagramFragmentationChecksumOptions
Topics discussed in this section:Topics discussed in this section: