Answer Description

Creating a firewall exception will allow that program or data on that port to bypass the firewall. Allowing a session and establishing a tunnel both refer to creating a connection (for example creating an SSH connection). Creating an AP would be creating an Access Point in a wireless network.

Wikipedia

In computer security, an access-control list (ACL) is a list of permissions associated with a system resource (object) An ACL specifies which users or system processes are granted access to objects, as well as what operations are allowed on given objects Each entry in a typical ACL specifies a subject and an operation For instance, if a file object has an ACL that contains (Alice: read,write Bob: read), this would give Alice permission to read and write the file and only give Bob permission to read it