WAN protocols, which define communication over the various WAN media. WAN protocols are developed to maximize the ability to move information along greater distances so they generally function at lower speeds than do LAN protocols. An example of WAN protocols include Frame Relay. Routing protocols, which determine optimal paths through networks and transport information across these paths. A router is a device that moves information from one network to another, applying intelligence in the process to ensure that the information reaches its destination securely and in the fastest way possible.
Routers support a variety of protocols at the same time.
They use intelligence in both hardware and software to offer high functionality for complex networking tasks such as prioritization of data traffic. Cisco offers a broad range of routers, from the Cisco 12000 and 7000 families, which are designed for larger organizations, to the Cisco 1600 series , which is designed for smaller companies. The choice of router depends on the user s specific needs and functionality requirements. Switch A switch is a device that moves information between multiple users while maximizing the speed of data transfer. A switch is primarily used in parts of the network to alleviate network congestion and increase bandwidth within the network.