121. What are the main components of a VPN?
Virtual Private Network (VPN) consists of following main components:
I. Network Access Server (NAS): A NAS server is responsible for setting up tunnels in a VPN that is accesses remotely. It
maintains these tunnels that connect clients to VPN.
II. Firewall : It is the software that creates barrier between VPN and public network. It protects the VPN from malicious activity that
can be done from the outside network.
III. AAA Server : This is an authentication and authorization server that controls the access and usage of VPN. For each request to
use VPN, AAA server checks the user for correct permissions.
IV. Encryption : In a VPN, encryption algorithms protect the important private data from malicious users.