A single access point is appropriate for a limited number of users in a small area. For example, you might want to provide wireless access for a group of employees in one area on one floor of an office building.

A good rule of thumb is that one access point for can serve 3000 to 4000 square feet of space, with no user more than 60 feet from the access point. Walls and floors reduce the coverage further, depending on the materials from which they are made.