VPNs, or Virtual Private Networks, help to ensure internet privacy by allowing private communications or data transfer over a publicly accessible network. In simpler terms, it allows two ends to communicate to one another without having to worry about who is listening in between. The need for VPNs came up in the effort to stop man-in-the-middle attacks where the attacker tries to take the information being shared while it is being sent to the receiver. This brought the need for public VPN services, where internet users could obtain access to several servers in different parts of the world in order to gain the best speeds and customizability. To this day, one of the leading such services is ExpressVPN which is well known as one of the fastest in the world. For those interested in an easy to use, high speed and ultra secure VPN service, you may obtain an ExpressVPN coupon which will give you the opportunity to try the secure connection at a very reasonable price.
There are two major types of VPNs. The first one is called remote-access where a single computer is trying to connect to a network. An example of this would be an employee trying to access their company’s network from their home. Many teleworkers require this. The second one is site-to-site. An example here would be a company’s department in New York trying to access files on a server in Denver. The major difference between the two is that a remote-access VPN would be created the moment it is needed and would exist only for the duration the user was logged in. A site-to-site VPN would be of an established line where the connection would not just end the moment one user logged off.
Just as there are many ways to talk privately in a room full of people, there are many ways to achieve a VPN. Some technologies allowed VPNs through leased lines. Leased lines are basically lines set aside for just that communication. This is similar to the carpooling lane on highways in major cities. Many companies rent these lines in order to achieve massive amounts of data exchange. The drawback to this is cost. However, many companies use leased lines in order to get a site-to-site VPN.
Smaller companies and individuals needing private networks can achieve acceptable levels of security through tunneling. Tunneling is similar to writing a series of letters and sending each one off in another direction. However, ultimately each letter would arrive in one location. The stops in between would be different. It is sent in a way that the mail office and anyone seeing the envelope would only see a normal piece of mail. They wouldn’t be able to figure out easily that it was part of a larger communication. In this way, each data packet is sent so that it appears that packets are just normal internet packets being passed around. Encrypting data packets can be used but are not required. However, it can be recommended depending on the level of internet privacy the company or individual wants to ensure.
In essence, what makes a VPN is that it allows private communications over a public line. The various methods used are chosen depending on the level of privacy needed balanced by cost. Each method of creating VPNs ensures internet privacy up to certain extent. A leased line can give a high level of internet privacy because you are not sharing that direct line with anyone else. However, the cost can be higher because the amount of data you can transmit is higher. More widely used is tunneling. This method can provide an almost equal level of privacy. However, there are also many protocols under tunneling. Some are better than others and require some set up. In either case, the level of privacy has to be balanced with cost for which services such as ExpressVPN are recommended.
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