Posts Tagged ‘filter table’

Functionality of Layer 2 Switches/Bridges

Thursday, May 26th, 2011

Layer 2 Switching

Layer 2 Switching (STP Needed)

Layer 2 switches and bridges switch frames on a network while layer 3 routers route packets between networks. I once heard a network engineer being asked if a network can be made faster if the network is optimized to use more switches than routers. The network engineer answered that it shouldn’t matter. Of course, this is wrong. Think about it, if your network is just switching, the switches do not have to concern themselves with looking at the network layer; this significantly cuts down on the overhead since there is no need to decode the network header information at every stop like is done by a router. There are some concerns to keep in mind if your network starts to get too big which I discuss near the end of the blog. (more…)