What is a VPN and why is it useful?

Virtual Private Network for employees outside the firm to securely access the network.

Virtual Public Network where the public has internet access, like at an airport or coffee house.

Virtual Primary Network where customers can get bids from different internet providers.

Virtual Primary Network where customers can link to a company for its services.

Virtual Primary Network where most of the firewalls are set. It is the most secure part of the network.