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Start Shopping  Network Router Overview   By maintaining
configuration information in a piece of storage called the
routing table, wired or wireless routers also have the ability
to filter traffic, either incoming or outgoing, based on the IP
addresses of senders and receivers.  Knowing why routers are
useful  Although with a small network, you actually do not need
routers, if your network is connected to the Internet, you will
have at least one router. In addition to a router connecting you
to the Internet, you may choose to have internal routers on a
network for many reasons, such as the following:    • To
accommodate a second office that is connected to your network
via a telephone company using either a private line or leased
lines or over the Internet.    • To increase security for
systems on your network, which would