LAN Switching first-step

Benefits of a Layer 3 Router in a Network

Because routers use Layer 3 addresses, which often have structure to the address, routers can use techniques, such as address summarization, in building networks that maintain performance and responsiveness as they grow in size. By imposing a hierarchical structure on a network, routers can efficiently use redundant paths and determine optimal routes in a constantly changing network environment.

This section describes router functions that are vital in a switched LAN design:

• Broadcast and multicast control

• Broadcast segmentation

• Media transition

Broadcast and Multicast Control

If your user applications require broadcast and/or multicast support, such as videoconferencing, IPTV, or streaming data, such as ...