The advent of technology has prompted for cost reduction in communication. The tremendous growth of Internet and related applications has extended the use of Internet as a media for communication. A Virtual Private Network (VPN) makes use of the Internet as the transport backbone to establish a connection across continents to connect remote branch office, business partners, mobile workforce and customers. VPNs enacts as private network overlay on public IP network infrastructure, thus reducing cost to a local connection.

can ensure the security of deploying sensitive data over public network with data encryption, data authentication and access restriction. Mission-critical application can be optimise by prioritisation, interoperability and scalable management of the network for reliable connection and to accommodate the growth.