The entrance facility is the place where the connection to a wan is located. it is basically the point where the lan begins and ends. what is another name for this point?

Demarcation point.

Explanation:

A LAN is a private network within a small geographical location. It is the interconnection of end user devices and other intermediate network devices. For a LAN to access other external WAN networks, an default route must be configured on the edge router that connects directly to the WAN in a point called the Demarcation point.

Demarcation point or Demarc is a point where the wide area network (WAN) is connected to a private local area network (LAN). It is the point where a srevice provider network ends and the customer's network begins or ends.