Link layer,LANS:outline 5.1 introduction. 5.5 link virtualization: services MPLS 5.2 error detection, 5.6 data center correction networking 5.3 multiple access 5.7 a day in the life of a protocols web request 5.4 LANs addressing,ARP Ethernet ■switches ·VLANS Link Layer 5-3Link Layer 5-3 Link layer, LANs: outline 5.1 introduction, services 5.2 error detection, correction 5.3 multiple access protocols 5.4 LANs addressing, ARP Ethernet switches VLANS 5.5 link virtualization: MPLS 5.6 data center networking 5.7 a day in the life of a web request