Are hardware devices or software modules that perform encryption to secure data, perform authentication to make sure the host requesting the data is an approved user of the vpn, and perform encapsulation to protect the integrity of the information being sent.

Endpoint

Explanation:

 End point device is the type of hardware and the software module which basically perform encryption for securing the data on the network like TCP/IP (Transmission control protocol and the internet protocol).

It also perform authentication process so that it make sure that the data are approved by the user when the host send the requesting to the VPN (Virtual private network). Then, it also performing the encapsulation process for protecting the data and the information integrity in the network.    

i'm pretty sure data is stored in a form

answer inspecting packets in isolation from their context;