Overview of Virtual Private Networks

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Virtual Private Networks Virtual private networks (VPNs) were originally associated with remote connectivity services, such as public telephone networks and Frame Relay PVCs (VPN History). They evolved into IP based data networking. Early VPNs required extensive expertise to implement, but today deployment is simple and affordable. VPNs are based around technology that ensures strong authentication and encryption (Cartwright, 2003). Current VPN market trends are leaning towards smoothing out the rough edges of IPsec and MPLS, looking forward to additional applications of them, and ways to integrate them so that networks can communicate even if they were provisioned differently (VPN Market Trends). The market is focusing on improving gateway and client management software. There is also an emerging trend to improve security functions in their offerings and allow integration with other devices. The market trends involve improved service agreements in handling service problems. The communications industry is shifting toward cluster computing to tap into sharp increases in computing power, raise industry standards, and achieve reliability through product architecture (Macwan, 2006). There are two efforts of standardization, Service Availability Forum (SAF) and Carrier Grade Linux (CGL). Both standards strive to create standards with appeal to the telecom market in terms of marketplace standardization and the ability of third party independent software suppliers to produce
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