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