3Com 2500 manual 4 Bridging in the Traditional Bridging and Routing Model

Bridging and Routing Models 3-5

Router	Bridge
	3
2
Router vs. Bridge ?
1
	Interfaces (ports)
	Networks

Transmitting host Destination host

Figure 3-4 Bridging in the Traditional Bridging and Routing Model

In the traditional bridging and routing model, a packet is routed as follows (see Figure 3-5):

1The packet enters the bridge or router.

2The bridge or router determines that the packet belongs to a recognized routing protocol, so the packet is passed to the router.

3The router examines the destination network address and forwards the packet to the interface (port) connected to the destination subnet.

	Router	Bridge
	3
2	Router vs. Bridge ?
1

Interfaces (ports)

Networks

Transmitting host

Destination host

Figure 3-5 Routing in the Traditional Bridging and Routing Model