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A virtual private network (VPN) is a network that is completely isolated from the rest of the Internet. It provides people, businesses, governments, and military organizations to remotely use network resources securely. For the most part, VPNs are free to use. VPNs use site-to-site and remote access methods to work. They also use an array of encryption services that allow the secure connection to be formed.
So, do we really need VPNs? Actually, yes we do! VPNs provide a vital service to businesses, governments, military organizations, and even individuals. VPNs provide secure access to your local area network. Without VPNs, accessing sensitive information remotely would not be possible. VPNs allow two or more networks to be connected together. For example, a branch office of a bank located in Nevada and its headquarters located in Texas connect to one another through the Internet securely to share their resources (such as bank statements, mortgage records, etc.) together. With a VPN, both locations are logically connected together as one using the Internet securely as its backbone.
Imagine applying for a home loan where your paperwork has to be snail-mailed back to the corporate headquarters for review. It can take up to a week! But with VPNs, the home loan can be nearly instantaneous reviewed by the bank's headquarters no matter how far separated the branch office and the bank headquarters are.
VPN is Virtual Private Network which communication secure manner over the public Internet such as Internet. VPN provide Confidentailty, Encryption, Intgrity and anti reply.
IPSEC(IP Security) protocol provide enctyption and Decryption over the Internet.
Vpn is a secure communication between the client and server with encryption of data end to end. Generally a tunnel is created between two communication interfaces to send the data in securely, which is known as ipsec tunnel(internet protocol security).
VPN i.e Virtual Private Network establishes a secure connection between your machine to the server of desired location. The connection is secured with help of the protocol you use to connect VPN. These protocols applies encryption on your connection to make it secure. The prime purpose of VPN is to hide your actual IP address and allows you to surf the internet with VPN ip address which helps to access the websites which are by default blocked on your ISP connection.
Most common protocols for VPN are PPTP , L2TP , SSTP and OpenVPN.
Interconnecting two or more branch offices over internet cloud using L2TP tunneling securely. In simple words, extending LAN to other distant or non-distant office using dissimilar or similar public data operators or ISPs
Can Access an network over from anywhere in the world (Site-to Site) with security based using pre shared key or L2tp protocol
