What is VPN ?
VPN is a short form of Virtual Private Network, as a name suggest it is related to privacy. It extends your private network over the public or shared networks example Internet, and you can use these networks as if they were your private network and it will include all the security, management policies and functionality of the private network. It have point to point connection through the dedicated connection or encryption, or it can contain both these. The point to point connection can be between any of these two :-
two networks, two servers, two clients, or between client and server.
Technically, VPN connection is over the large area i.e. Wide Area Network (WAN) but for the user it appears as if it is a private link, therefore the name comes 'virtual private network'.
How it works
VPN is basically used to connect the two device and send the data. Lets say, you work in a company and want to send some important information immediately to the company server so that your team can analyze and use the information, so first thing to use VPN is, you need to have VPN software installed in your system.When you try to connect with your company server, your VPN software try to establish a connection with your VPN server using the tunneling protocol in which all the management policies, authentication and encryption of the connection is incorporated. After the remote device or computer is successfully authenticated a secure connection, also called tunnel, is established. Now whatever information you try send, will transfer through this tunnel and that will be encrypted at the sender's end and correspondingly decrypted at the receiver's end. Hence, even though we are using the untrusted channel for the connected are data is much secure.
The types of VPN are :
L2TP VPN - Layer 2 Tunneling Protocol VPN;
PPTP VPN - Point to Point Tunneling Protocol VPN.
Open VPN -It is a free & open source virtual private network program for creating a server-to-multiclient or point-to-point encrypted tunnels between host computers.
Why to use VPN or What is the need ?
VPN hide your identity from the hackers or ISP which keep the track of your IP address. It also provide the option change your IP every minute.
2. Increase Security
VPN creates a tunnel to exchange data and everything passing through tunnel encrypted at the sender's end and decrypted at the receiver's end. Hence,data is invisible to the outsider, therefore add an additional layer of security.
3. Bypass region restriction
If you want to see movies or visit any website which is restricted in your area you can use VPN. Some VPN services provide option to select the regional IP address. So, find out region where your website or web page is not restricted and change your IP address accordingly.
4. Provide a Virtual firewall
VPN protect your IP address, so whenever you use VPN your computer or your device address will not be seen.
5. Prevent password sniffing for Hot spot users
Nowadays, hot spots are present every where which is very convient to use but at same time it very dangerous because a hacker may sniff through the network and steal your important information like password.VPN concept of using tunnel prevent the sniffing of your send and received data, hence decrease the risk.
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CAN MANY COMPUTERS BE CONNECTED via VPN ???
ReplyDeleteAS IF CREATING A SERVER and exchanging data to a huge extent frm one to another ????
In present, VPN work through point to point connection..... so using VPN for more than two device is not possible in present...... there can be scope in future ...but for you can use leased line for the purpose but again it is costly. i will not advise to use this.
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