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A Virtual Private Network (VPN) is a computer network that uses a public telecommunication infrastructure such as the Internet which allows remote offices or individual users with a more secure access to their organization's network. Its objective is to avoid an expensive system of owned or leased lines that can only be used by one organization where it communicate with VPN servers using a number of specialized protocols.

It compresses data transfers between two or more networked devices which are not from the same private network in order to keep the transferred data private from other devices on one or more intervening local or wide area networks.

 
 
Benefits of VPN:
 
Reduced Costs
 
VPN help organizations save money by eliminating the need for expensive long-distance leased lines as well as reducing long-distance telephone charges.
   
Improved Security
 
The use of encryption protocols and authentication helps secure the data that is traveling over the VPN channel.
   
Improved Scalability
 
VPN can be used to mix legacy systems with new technologies, also it is not limited in the type of network technologies and topologies it can support, in fact it can be installed over a variety of network architecture and be configured or re-configured as the network grows.
   
Flexibility and Reliability
 
VPN allows enterprises multiple ways to securely interconnect with network users through availability of WWAN, DSL and other broadband services. Another benefit of VPN is it allows user employ any data service option virtually.
   
 
VPNs can also improve the reliability of data services by using data services from several independent carriers and bonding them into one seamless data channel. VPN also use cryptographic algorithms to ensure the security of the data while it is in transit.
   
Greater Access to Mobile Users
 
Workers are able to connect to the company's servers to access emails and company data while work from home or on business trips.
 
 
 
 
 
 
 
 
   
 
 
   
 
 
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