Radius increases security and deployment giving support for centralized user identification, authentication, dynamic key management and accounting. It gives a mechanism for controlling user access to a computer network. Radius server keeps a check on the user passwords and grants and denies access. It also helps in keeping a check on the network usage allowing the management to find out how and when the network is being used. Radius server uses port 1812. Here the port numbers are a part of the TCP/IP mechanism that connects clients and servers on the internet. Why should you use Radius? Radius protocol uses authentication, authorization, and accounting. These are some useful services that a radius server can perform. Authentication: This is the process whereby the system determines the identity of the user. It is usually done with the user name and password. Generally, this method of authentication is followed at restaurants. Apart from this, other forms of authenti