Understanding VPN (Virtual Private Network) and Its Uses in Our Daily Activities

In Computer Networking Skills, Computer Skills
Understanding VPN and Its Uses

The VPN technology has widely used by many internet users and it helps to protect the users’ privacy while connecting to the internet. You probably already know what a VPN is. However, if you want to buy a VPN plan, make sure you already know your requirements in terms of features and functions that are appropriate your needs. But before figuring out a powerful VPN service that suits your internet connection needs, here you will explore the definition of VPN and its uses in our daily activities.

The definition of VPN (Virtual Private Network)

VPN refers to a type of internet connection technology that lets your device connect to a public network and use it to join the local network. By using a public network, you can join a local network; to get the right and the same settings as the network that is used in an office environment.

VPN can occur between two mobile devices, two PCs, or can be between more than two different devices. A company establishes a VPN network by using tunneling and encryption technology. A VPN connection can also occur in all layers of the OSI protocol. So, you can use a VPN connection for many communication purposes. Thus, the VPN can also be categorized as an alternative WAN (Wide Area Network) infrastructure to get a point-to-point private connection between you and the destination device(s).

Tunneling and Encryption Technology in VPN

A VPN connection consists of the mix of tunneling and encryption technology. The private connection security that passes a confidential data in a VPN connection is generated by both tunneling and encryption technology.


Tunneling is a technology to handle and provide a Point-to-Point connection from the data source to its destination. It’s called as tunnel as the Point-to-Point connection is actually formed by a network across the public. But such connection does not care about whether the data packets belong to someone else, but it only serves to transfer your data.

To illustrate, the process of tunneling is like a busway lane that uses a common path to be passed by the buses. Actually, the Point-to-Point Connection does not really exist, but every crossing data looks like passing a personal connection that is Point-to-Point alike. Usually, the tunneling technology on the network made by the setting ripe IP addressing and IP routing. The point between the source tunnel and the destination tunnel need communicate with each other over a network using IP addressing. If the communication between the source and the destination tunnel is not working well, the tunnel will not be formed and will not be able to create a VPN connection.

If the tunnel has been formed, then the fake Point-to-Point connection can be used to pass your data directly. But in the technology, VPN and tunnels are not only left open without any additional security system. The tunnel will soon be equipped with an encryption system for the passing data. The data encryption process makes VPN technology becomes more secure and more private, so you feel like using a private communication channel.


The encryption technology in a VPN connection ensures your data that are passing about in the tunnel cannot be read by anyone except the computer equipment as the legitimate receiver. The more data pass through the open tunnel on a public network; the encryption technology is increasingly needed. The encryption will change the information in the tunnel becomes a cipher text or unrest text that has no meaning at all if the public read it directly. To make it back to have a meaning, it requires a decryption process. The decryption process is a process of reshaping the mess text. This process usually occurs at the end of a VPN connection. Read also: The Best Free Encryption Software.

At each end of a VPN connection has the agreeing and algorithm that will do the decryption process. Thus, the data will arrive at the receiver safely and it is fairly safe for a transaction through a public network.

The Uses of VPN Technology in Our Daily Activities

VPN technology makes the world becomes more limitless. With only the Internet connection, all data in the network at your office can be accessed easily. The use of VPN technology is not only as simple as to write and send data to each other, but the VPN is also really applicable in the banking world, tour and travel, expeditions, and many other sectors that make the VPN as the primary business key.

It seems that the VPN technology is no longer considered as the solution for an alternative connection only. But the VPN is also a major solution to support the development of rapid communication worldwide.

Types of VPN Remote Access

Basically, a VPN is a process that aims to gain remote access to the destination of a private network connection. The process of the remote access of VPN works separately into two types depends on whom the VPN remote access process is performed. The following are the two types of VPN remote access:


Literally, the meaning of client-initiated is the clients who took the initiative to do something. This kind of VPN is the most preferred one the most commonly used.

So, when you want to build a VPN connection on your PC, the PC is actually trying to build a tunnel and encryption to achieve its goal safely. However, this process still relies on ISP networks that are used in general. Client-initiated VPNs are often used by public PCs by relying on a VPN server or VPN concentrator on the network destinations.

Network Access Server-Initiated

It is completely different to the client-initiated VPN remote access. The network access server-initiated VPN does not require VPN clients to make the tunnel and perform encryption and decryption by themselves. This type of VPN connection is only requiring the users to dial-in to the Network Access Server (NAS), and ISPs. Then the NAS builds tunnel toward the private network that is designated by the client. Therefore, the VPN connection can be built by many clients from anywhere as usually the ISPs NAS are often open to the public.

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