How are communications secured from snooping in a virtual private network?

What will be an ideal response?

In order to secure virtual private network (VPN) communications over the public
Internet, the VPN client software encrypts, or codes, messages so their contents are protected
from snooping. Then, the VPN client appends the Internet address of the VPN server to the
message and sends that package over the Internet to the VPN server. When the VPN server
receives the message, it strips its address off the front of the message, decrypts the coded
message, and sends the plain text message to the original address inside the LAN. In this way,
secure private messages are delivered over the public Internet.