Protocol and Layered Architecture

Protocol and Layered Architecture

1. Network Types

   • WAN - Wide Area Networks >Technologies – Circuit switching – Packet switching – Frame relay – Asynchronous Transfer Mode (ATM)
   • MAN- – Metropolitan Area Network
   • LAN - Land Area Network >Example: Ethernet and Token ring

2. Protocols

   • Set of rules governing the exchange of data between two hosts
   • Protocol Functions: Different protocols at different levels have different functions. Some functions are performed by more than one protocol
   • Protocol Elements:– Syntax: data format and signal level – Semantic: control info for coordination and error handling – Timing: speed matching and sequencing