COMPUTER FUNDAMENTALS

Detailed explanation-1: -Router. Routers filters and forward data based on logical addresses, for example, the IP address. Routers can perform several functions. They store information about networks, can be configured to be packet-filtering firewalls and can use access control lists.

Detailed explanation-2: -A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions between networks and on the global Internet. Data sent through a network, such as a web page or email, is in the form of data packets.

Detailed explanation-3: -Routers are intelligent devices, and they store information about the networks they’re connected to. Most routers can be configured to operate as packet-filtering firewalls and use access control lists (ACLs).

Detailed explanation-4: -A switch (sometimes named a switching hub) refers to a network device which filters and forwards data packets across a network. A switch is normally a multiple-port device (it can have 48 of more ports; Figure 11.2(B) shows some switches), meaning that it is an active element working on layer 2 of the OSI model.