[FRED]

What are the main reasons you use a router to segment a LAN? Is this just for broadcasts or are there other reasons?

[Jay Whale]

What are the main reasons you use a router to segment a LAN? Is this just for broadcasts or are there other reasons?

@FRED

Yes one of the main reasons for using a router to segment a LAN is to control broadcast messages. Routers do not forward broadcast message, so any broadcasts that take place on the one segment will not be forwarded to the other segment.

The other major benefit of a router in terms of LAN segmentation is the ability to filter traffic at layer 3 (IP addresses) and layer 4 (ports) using access-lists to prevent traffic from passing from one segment to the other.

[Steven]

Network segmentation is a way of dividing a computer network into subnetworks, each being a network segment or network layer. A big network can be segmented to smaller subnets using a Router.