GDB CS 601 Solution

Dada link layer divided into TWO sub layers.(1) LLC ensure reliability of physical connection at layer1.Protocol IEEE 802.3 most commonly used standard.PPP is important standard at this OSI level.it used for communication across point-to-point link.Also important in WAN.
(2)MAC used how workstations cooperatively share transmission media.IEEE 802.3 standard specifies a medium-access method known as carrier sense multiple access with collision dwtection(CSMA/CD).