My wireless router is beginning to show signs of dying -- it restarts itself every once in a while. Needless to say, it needs to be replaced. Coincidentally, one of my friend's neighbour is having a garage sale, with one of the items being offered being an 11n wireless access point for just $20. It's a D-Link (I don't remember the model) and appears to be in a good shape.
The problem is, I don't know what will happen if I use it in place of my router. Particularly, I'm not sure whether it will take only a single public IP address from the provider's DHCP for use by all computers connected to it (just like the router) or it will give each computer a public IP instead. As far as I remember, I'm only entitled to use a single public IP at a time.
I have a cable connection and an unnamed DOCSIS modem that can only work in bridged mode (there's simply no way to change the working mode).