What is AAA?

AAA stands for authentication, authorization and accounting, used to control user’s rights to access network resources and to keep track of the activity of users over a network. The current standard by which devices or applications communicate with an AAA server is the Remote Authentication Dial-In User Service (RADIUS).

What are different types of VPN

Deployment classification Site to Site VPN Remote VPN  Classification based on OSI layers Layer 4/7 VPN – WebVPN Layer 3 VPN – IPSec, GREoIPSec Layer 2 VPN – L2TP, PPTP, MPPE Classification based on trust level Intranet VPN Extranet VPN Remote VPN  Customer point of view classifications  1.   Traditonal VPN Frame-relay (L2 VPN) ATM VPN [...]

Can you define in short what VPN is?

Can you define in short what VPN is? ->A Virtual Private Network (VPN) is a network technology that creates a secure network connection over a public network such as the Internet or a private network owned by a service provider. Large corporations, educational institutions, and government agencies use VPN technology to enable remote users to [...]

Can you explain what IPSec is

Can you explain what IPSec is ->ipsec is a suite of protocols which ensure the following: 1-confidentiality of data 2-integrity of data 3-anti-replay of data 4-non-repudiation contains the main cryptographic algorithms used in securing traffic between two networks over an un trusted network