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Goal of The Paper

Goal of The Paper. What exactly is a VPN? Why do you need a VPN? what are some of the technologies used in deploying a VPN? How does a VPN work? How many different types of VPNs? What are the advantages and disadvantages? What is the VPN future scope. Introduction.

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Goal of The Paper

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  1. Goal of The Paper • What exactly is a VPN? • Why do you need a VPN? • what are some of the technologies used in deploying a VPN? • How does a VPN work? • How many different types of VPNs? • What are the advantages and disadvantages? • What is the VPN future scope.

  2. Introduction • The Internet has changed the way what we do business • VPNs achieve one or more of the following goals: • connect users securely their own corporate network (remote access) • link branch offices to an enterprise network (intranet) • extend organizations' existing computing infrastructure to include partners, suppliers and customers (extranet).

  3. What is a VPN A Virtual Private Network (VPN) is a group of two or more computer systems, typically connected to a private network (a network built and maintained by an organization solely for its own use) with limited public-network access, that communicates “securely” over a public network.

  4. VPN Concepts • IPSEC: IP Security • L2F: Layer 2 Forward tunneling protocol • L2TP: Layer 2 Tunneling Protocol • PPP: Point-to-Point Protocol • PPTP: Point-to-Point Tunneling Protocol • QoS: Quality of Service

  5. How VPNs Work • VPNs are placed between private and public domains in networks to enforce dedicated secure paths, or tunnels.

  6. Security • Firewalls • Encryption • IPSec • AAA Server Authentication Authorization Accounting

  7. Types of VPNs • Software-based VPNs • Hardware-based VPNs • Standalone VPN Application packages

  8. Advantages of VPN • Cost Savings - replace expensive dedicated leased lines - replace modem pools and eliminate long distance dial-up fees. - increase business efficiency

  9. Advantage of VPNs • Easy Configuration - allocating IP addresses - creating user accounts on the gateway or authentication server

  10. Disadvantage of VPNs • VPNs require an in-depth understanding of public network security issues • The QoS depends on factors largely outside of control • VPN technologies from different vendors may not work well • VPNs need to accommodate protocols • Latency

  11. The future of VPN • Depend mainly on industry dynamics • VPNS should increase if standards solidify and vendor products interoperate fully with other • The use of VPN will increase if companies can measure the significant value

  12. Key VPN companies

  13. Actual VPN Implementation

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