[ Thanks to sanjay
for this link. ]
“The diagram above is very typical of home networks.
Study the diagram carefully and note the following key points of
interest:1. The wireless router can connect clients wirelessly using its
built-in WAP.
2. The wireless router can connect wired clients using its built-in
4-port switch.
3. While not noticeable in the diagram, those wired clients could
be connected via crossover cable (as long as the client’s NIC’s
also support “autosensing”).
4. And again, while not noticeable, the wireless router is likely
configured as a DHCP server and will automatically hand out (and
keep track of) IP addresses for each client that connects to
it.“Unfortunately, this diagram fails to illustrate the importance
of subnets. Also referred to as interfaces, subnets are the
keystones of understanding how to take your network to the next
level:”