Chapter 5 Link Layer and LANs
working: A Top Down Approach Featuring the , 3rd edition. Jim Kurose, Keith Ross Addison-Wesley, July 2004.
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5: DataLink Layer
Chapter 5: The Data Link Layer
Our goals:
understand principles behind data link layer services:
error detection, correction
sharing a broadcast channel: multiple access
link layer addressing
reliable data transfer, flow control: done!
instantiation and implementation of various link layer technologies
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5: DataLink Layer
Link Layer
Introduction and services
Error detection and correction
access protocols
Link-Layer Addressing
Hubs and switches
PPP
Link Virtualization: ATM and MPLS
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5: DataLink Layer
Link Layer: Introduction
Some terminology:
hosts and routers are munication channels that connect adjacent nodes munication path are links
wired links
wireless links
LANs
layer-2 packet is a frame, encapsulates datagram
“link”
data-link layer has responsibility of
transferring datagram from one node
to adjacent node over a link
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5: DataLink Layer
Link layer: context
Datagram transferred by different link protocols over different links:
., on first link, frame relay on
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