Chapter 5:The Data Link Layer Our goals: understand principles behind data link layer services: o error detection,correction o sharing a broadcast channel:multiple access o link layer addressing o reliable data transfer,flow control:done! instantiation and implementation of various link layer technologies 5:DataLink Layer 5-2 5: DataLink Layer 5-2 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