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

Overview:

• link layer services

• error detection, correction

• multiple access protocols and LANs

• link layer addressing, ARP

• specific link layer technologies:

  • Ethernet
  • hubs, bridges, switches
  • IEEE 802.11 LANs
  • PPP
  • ATM

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