Connect wireless router to existing network?

[Subodh123]

I have a D-Link wireless router with 4 ethernet ports.
I have a cable modem that connects to a switch to which all other computers
are connected.
I have a laptop with wireless networking.

Q1: How and where should I connect the wireless router so that the laptop
can connect to the internet as well as be visible on my LAN (assuming I use
windows workgroup)?

 

[Alien Zord]

I have a D-Link wireless router with 4 ethernet ports.
I have a cable modem that connects to a switch to which all other computers
are connected.
I have a laptop with wireless networking.

Q1: How and where should I connect the wireless router so that the laptop
can connect to the internet as well as be visible on my LAN (assuming I use
windows workgroup)?

Cable modem into the WAN port of the D-link wireless router, all other
computers or network hubs into the LAN ports. Your existing "switch" may be
a router so either disable its routing function or replace it with a
switching hub.