What is VPN Technology ? VPN Explained with Examples

By | 9th November 2015

What is a Virtual Private Network ?

A Virtual Private Network (VPN) is an encrypted private network connection that is constructed within a public network infrastructure such as the global Internet. A telecommuter or mobile worker can remotely access the network of the company headquarters from home or anywhere using a secured internet connection.

VPN connection is used for security issues, broadband services provide capabilities for using Virtual Private Network (VPN) connections to a VPN server, which is typically located at the corporate site.

Through the Internet, a secure tunnel can be built between the PC of the telecommuter and a VPN router at the company headquarters.

Instead of using a dedicated Layer 2 connection such as a leased line, a VPN uses virtual connections called VPN tunnels, which are routed through the Internet from the private network of an organisation to the remote site or employee host. Most Cisco products support the latest in VPN technology. It offers secure, reliable connectivity over a shared public network infrastructure such as the Internet.




Advantages of VPN

Advantages of VPN include the following:

·         Security-VPNs provide the highest level of security by using advanced encryption and authentication protocols that protect data from unauthorized access.

·         Cost savings-VPNs enable organizations to use the global Internet to connect remote offices and remote users to the main                 corporate site, thus eliminating expensive dedicated WAN links and modem banks.

·         Scalability-Because VPNs use the Internet infrastructure within ISPs and devices, it is easy to add new users. Corporations are able to add large amounts of capacity without adding significant infrastructure.

·         Compatibility with broadband technology-VPN technology is supported by broadband service providers such as DSL and cable, so mobile workers and telecommuters can take advantage of their home high-speed Internet service to access their corporate networks.

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 Types of VPN Access

Features of Secure VPNs

Network Firewall Explained

Switch-port Security

Switch port ACLs

Host Standby Router Protocol (HSRP)




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