The Institute of IEEE (Electrical and Electronics Engineers ) has subdivided the Data Link layer into two sublayers called the LLC (Logical Link Control) and MAC ( Media Access Control). This section details the functions of MAC addresses and how they are used at layer 2 of the OSI Reference Model. Read the full story

Know how IP uses ARP.
It is important to remember how ARP is used with IP. When a host needs to know the MAC address of a local host, Read the full story