|I think you meant Wireless Access Point (WAP) but in either case an access point is just a bridge. It will not do routing enabling you to connect two different networks like a Router will do. So you can not use just a WAP to connect computers to the internet. Now a Wireless Router is just a Router with a WAP built in. You can configure a Wireless Router to be a WAP but not the other way around.|
Why would you use a WAP? You can not have two routers on the same private network unless you configure one to be an WAP. Seems like a waist so some will by a wireless router for one side of the house and a WAP for the other side to extend the range of the wireless coverage.
In addition, not all routers are alike. Most people are use to SoHo routers which come with different firmware. It seems to be a trend for these routers not to have MAC filtering, bridging and other features that come in handy for setting up a wireless network. So your option is to get a regular router and a WAP which might have these features in its firmware.
I hope that clears it up for you.