MEDIA ACCESS CONTROL

MEDIA ACCESS CONTROL

1. DATA LINK FRAME

   • FRAME
     • A frame is a digital data transmission unit in computer networking and telecommunication.
   • HEADER
     • The frame header contains the control information specified by the data link layer protocol for the specific logical topology and media used
   • LAN & WAN
     • A LAN typically uses a high bandwidth technology that is capable of supporting large numbers of hosts. A LAN's relatively small geographic area (a single building or a multi-building campus) and its high density of users make this technology cost effective.
     • WANs cover large geographic areas (cities or multiple cities, for example). The cost of the long distance physical links and the technology used to carry the signals over those distances typically results in lower bandwidth capacity
   • ETHERNET
     • Ethernet is the dominant LAN technology. Ethernet provides unacknowledged connectionless service over a shared media using CSMA/CD as the media access methods.
   • POINT TO POINT PROTOCOL
     • PPP was developed as a WAN protocol and remains the protocol of choice to implement many serial WANs. PPP uses a layered architecture. To accommodate the different types of media, PPP establishes logical connections called "sessions" between two nodes.
   • WIRELESS