Chapter 5: The data link layer Our goals: Overview: o understand principles o link layer services behind data link layer services: g error detection O error detection correction correction D multiple access protocols o sharing a broadcast channel: multiple access and laNs o link layer addressing o link layer addressing, ARP o reliable data traster O specific link layer flow control: done! g instantiation and technologies implementation of various o Ethernet link layer technologies o hibs bridges, switches 5: DataLink Layer 5a-15: DataLink Layer 5a-1 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  hibs, bridges, switches