Routing

Routing

Routing across a WAN requires the addition of a network address field to each frame. Intermediate systems Use the network address like an area code to route the frame to the correct destination LAN.

The main devices used to provide wide area networking are; a bridge, a router, a brouter and a gateway.

Each LAN usually has one machine that acts as the entry point into the subnet upon receipt of a data frame; the network address is examined to see if it is one of the networks it is directly connected to.

if it is not , the frame is forwarded to another intermediate system in the subnet.