Where is the link layer implemented? ■in each and every host link layer implemented in “adaptor”(aka network interface card NIC)or on a chip application Ethernet card,802.1I transport network cpu memory card;Ethernet chipset link implements link,physical host layer bus (e.g.,PCI) attaches into host's system link physical buses physical trans ssion combination of hardware, software,firmware network adapter card Link Layer and LANs 6-8 Where is the link layer implemented? ▪ in each and every host ▪ link layer implemented in “adaptor” (aka network interface card NIC) or on a chip • Ethernet card, 802.11 card; Ethernet chipset • implements link, physical layer ▪ attaches into host’s system buses ▪ combination of hardware, software, firmware controller physical transmission cpu memory host bus (e.g., PCI) network adapter card application transport network link link physical Link Layer and LANs 6-8