Building a Virtual Private Network by Meeta Gupta

By Meeta Gupta

Your enterprise has to be attached in an effort to compete within the worldwide industry. staff want to know that their company's community is offered at any time, from anywhere. A digital inner most community (VPN) accomplishes this through the use of distant connectivity applied sciences that mix present inner networks with the net to soundly converse details. development a digital inner most community is your key to designing, imposing, and securing a completely hooked up community that meets your enterprise wishes.

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Building a Virtual Private Network

Your enterprise has to be hooked up in an effort to compete within the international industry. staff want to know that their company's community is on the market at any time, from anyplace. A digital deepest community (VPN) accomplishes this by using distant connectivity applied sciences that mix current inner networks with the net to soundly speak details.

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VPN technology not only reduces the cost of implementing a highly secure network environment, but also reduces management and staffing costs. In addition, it offers high availability, scalability, and effective use of network bandwidth. What goes into the making of a VPN-based solution? What are the components and requirements of a VPN? What are the building blocks of a VPN? What are the possible VPN architectures? These are the questions that this chapter explores. VPN Requirements A VPN is a modified version of a private network that allows you to leverage the traditional LAN or intranet setup along with the Internet and other public networks to communicate securely and economically.

As a result, most VPN requirements and the requirements of a traditional private network are essentially the same. 32 Chapter 2: VPN Requirements, Building Blocks, and Architectures Chapter 2: VPN Requirements, Building Blocks, and Architectures 33 However, the following requirements stand out clearly in the case of VPNs: • Security • Availability • Quality of Service (QoS) • Reliability • Compatibility • Manageability Security Private networks and intranets offer a high-security environment because the network resources are not accessible to the general public.

This is a moderately expensive class of service meant for bandwidth-intensive applications. • Absolute QoS. This class guarantees both throughput as well as latency. Therefore, it is the most expensive class of service and supports both bandwidth-intensive and delay-sensitive applications. Best effort QoS is offered to individual Internet-users that need the connectivity to surf the Web (generally from home). Absolute QoS, on the other hand, is meant for real-time audio and video transactions. Relative QoS is best suited for extranets and remote accesses that neither demand extremely high throughput nor minimal latency.

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