Definition of VPN
Virtual Private Network or commonly called VPN is a safe way to access local area networks that are in a certain range, by using the internet or other public networks to transmit packet data privately. One of the functions of VPN is security in communicating or exchanging data, also does not allow other parties to infiltrate undue traffic (network traffic).
According to IETF, Internet Engineering Task Force, VPN is an emulation of [a] private Wide Area Network (WAN) using shared or public IP facilities, such as the Internet or private IP backbones.VPN is a form of private internet through a public network (internet), with an emphasis on data security and global access through the internet. This relationship is built through a virtual tunnel (tunnel) between 2 nodes.
VPN Connects PCs to public networks or the internet but is private, because it is private so not everyone can connect to this network and access it. This is done to maintain security in the exchange of data or information.
The concept of working VPN is basically VPN Requires a server that functions as a liaison between PCs. If described roughly like this
internet <—> VPN Server <—-> VPN Client <—-> Client
when used to connect 2 computers privately with an internet network, it looks like this:
Computer A <—> VPN Clinet <—> Internet <—> VPN Server <—> VPN Client <—> Computer B
So all connections are managed by VPN Server so that adequate VPN Server capabilities are needed so that the connection can be smooth.
VPN or virtual private network technology has three main functions, namely
VPN technology is a technology that utilizes public networks which are certainly very vulnerable to data theft. For this reason, VPN uses encryption methods to shuffle data that passes through. With the encryption technology, data security is more guaranteed. Although there are those who can tap data that passes through the internet and even the VPN path itself, it is not certain that they can read the data, because the data has been randomized. So, this confidentially is intended so that the information transmitted can only be accessed by a group of authorized users.
2. Data Integrity (Data Integrity)
When passing through the internet, the data actually has traveled very far across various countries. During the trip, various disturbances can occur to the contents, either lost, damaged, or manipulated by people who are not supposed to. In VPN there are technologies that can maintain the integrity of data from data sent to the data arrived at its destination.
3. Origin Authentication
VPN technology has the ability to authenticate the sources of data senders to be received. VPN will check all incoming data and retrieve information from the data source. Then, the address of the data source will be approved if the authentication process is successful. Thus, a VPN guarantees that all data sent and received is from its proper source. There is no data that is falsified or sent by other parties.
This VPN is often used by companies to maintain the confidentiality of important data or information owned by the company apart from being easy to use, the costs incurred are not so great. so a little explanation about VPN, if there are errors or deficiencies do not hesitate to give comments below.