VPN technology is a private communication channel on a public network which is the Internet. Security is the essential concept of VPN. The three fundamental components of VPN security are encryption, authentication, and tunneling. VPN ensures privacy by encrypting a message before it is transferred through the public network. When the message arrives at the other end of the public network, the VPN decrypts it. This encrypted passage the message travels through is called a tunnel. The hardware and software at the tunnel’s endpoints are responsible for the encryption that scrambles the data and the authentication that controls access to the tunnel so that only authorized users can access it.
VPN services are valuable for businesses because they can allow remote workers secure access to the company’s network, just like if they were at their desks in the office. Another advantage of VPN is that it is a cheaper alternative to a dedicated phone line. Besides, it will save you money spent on long-distance phone calls.
For an organization looking to provide a secured network infrastructure for its client base, VPN connection offers two main advantages over alternative technologies: cost savings, and network scalability. To the clients accessing these networks, VPNs also bring some benefits of ease of use.
Cost Savings with VPN
VPN can save an organization money in several situations:
– eliminating the need for expensive long-distance leased lines
– reducing long-distance telephone charges
– offloading support costs
VPNs vs leased lines – Organizations historically needed to rent network capacity such as T1 lines to achieve full, secured connectivity between their office locations. With a VPN, you use public network infrastructure including the Internet to make these connections and tap into that virtual network through much cheaper local leased lines or even just broadband connections to a nearby Internet Service Provider (ISP).
Long distance phone charges – VPN also can replace remote access servers and long-distance dialup network connections commonly used in the past by business travelers needing to access to their company intranet. For example, with an Internet VPN server, clients need only connect to the nearest service provider’s access point that is usually local.
Support costs – With VPNs, the cost of maintaining servers tends to be less than other approaches because organizations can outsource the needed support from professional third-party service providers. These provides enjoy a much lower cost structure through economy of scale by servicing many business clients.
VPN Network Scalability
The cost to an organization of building a dedicated private network may be reasonable at first but increases exponentially as the organization grows. A company with two branch offices, for example, can deploy just one dedicated line to connect the two locations, but 4 branch offices require 6 lines to directly connect them to each other, 6 branch offices need 15 lines, and so on.
Internet based VPNs avoid this scalability problem by simply tapping into the the public lines and network capability readily available. Particularly for remote and international locations, an Internet VPN offers superior reach and quality of service.
To use a VPN, each client must possess the appropriate networking software or hardware support on their local network and computers. When set up properly, VPN solutions are easy to use and sometimes can be made to work automatically as part of network sign on.
VPN technology also works well with WiFi local area networking. Some organizations use VPNs to secure wireless connections to their local access points when working inside the office. These solutions provide strong protection without affecting performance excessively.
Reasons To Use Free and Paid VPN Software
There are many reasons to use a VPN client. But the main of them to use VPN services are:
1) VPN encrypt and compresse all web browsing traffic for safe and fast surfing experience;
2) VPN unblock local ISP’s traffic shaping and filting, return you a true world;
3) Hide online tracks from internet sniffing & web monitoring system, work with any high speed internet connections;
4) Your real internet IP is 100% hidden when using the VPN service;
5) Visit US/UK based rich video, online TV, audio and social network websites;
6) Working with almost any operation systems like Microsoft Windows XP/Vista/7, Apple Mac OSX, Linux Ubuntu, or almost any mobile phones like iPhone, the New iPad, Samsung Galaxy ,Google Android Phone, WM65 and most network appliances.