VPN – Virtual Private Network
The need to create secure and cost-effective intra-urban computer networks and their connections between them has led to the development of a VPN. Virtual private networks of a special type of wide area network (WAN), which are reached by connecting without using a private line lease and use Internet access for remote connection between physically remote workstations and networks. VPN has its own set of programs, security protocols that allow for secure communications, data transfer. The organization of Internet access by the type of creation of VPN computer networks in comparison with ordinary computer networks is that this technology is a cheap alternative. Let’s look at the types of virtual private networks that can be created.
Depending on the scale and location of networks connected via VPN, there are several different types. There are three main ways in which VPN can be implemented. One of the most commonly used options is remote client access through a VPN, which may allow company employees access to the intranet. Another type of VPN can allow two separate segments of local networks, Internet access, which will be interconnected. The third type of VPN is simply a private intranet of the company, which allows favorable, controlled access to the worldwide network for each user.
How do virtual private networks.
Of the many types of virtual private networks, the most common is the one that provides remote access to the intranet of any company. It is based on the traditional client-server model in a private network. A VPN server is connected to the Internet. To understand how this type of connection works, you need to know how the VPN client works. These VPN Client programs are installed on machines that need remote access..
Using a connection to the Internet provided by the provider, the client program establishes a connection to the VPN server of the company that provides access to the program, after checking the user name and password. Once the VPN connection has been established, the remote computer can access the private network, like all other terminals connected to the computer network of the system in the country.
In fact, there is no need to create a separate dedicated line for such a connection, which significantly leads to a reduction in connection costs. When establishing a VPN connection, a secure tunnel is established between the VPN server and the client.
How a VPN tunnel works
To learn how a VPN works, you need to know what a VPN tunnel is. A VPN tunnel is basically a special type of connection between a VPN server and a client. Data is transported, follows different protocol rules that encapsulate data or even encrypt along the way to the VPN server. On the site where the VPN server receives, the data is again encapsulated and decrypted. This accurate and secure connection is maintained between the VPN server and the remote computer. VPN tunnel can be voluntary or mandatory. Some of the protocols used for VPN tunneling are: IPSec (Internet Protocol Security), dot – PPTP (Point Tunneling Protocol) and L2TP (Layer Two Tunneling Protocol).
The benefits of virtual private networks.
One of the obvious advantages of a VPN connection is the fact that it (the network) is substantially, easily and inexpensively installed. It can provide long distance communications between several branches of a company’s office by providing secure data transmission and encryption in order to conduct, for example: video conferencing, as well as other data transmission. This reduces the costs associated with maintaining a long-distance network environment. Overall, this brings a reduction in operating costs.
Most industrial Intranet enterprises use VPN technology to create an internal connection. The prerequisites for cost-effectiveness and the high level of security of virtual private networks make them an attractive and popular solution compared to the usual dedicated line of other networks. I hope this article has given you a general idea of how a VPN works by offering secure connections and resource sharing services.