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 a Ethernet ■switches VLANS Link Layer 5-10 Link Layer 5-10 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