VPN (Virtual Private N/W)

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VPN (Virtual Private N/W)

• By,
• Naveen Kumar Ratkal

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Outline

• What is VPN ??
• Encryption Method
• Tunneling
• Complete Process Involved In Tunneling
• Real Time Example
• Performance
• Advantages
• Conclusion

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What is VPN ??

• Uses Virtual connection
• Internet
• Leased Lines

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Public Private Key Encryption Process
Private Key
Host 2
Public Key
Host 1
Encryption
Encrypted Data
Host 3
Decrypted Data
Public Key
Decryption
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VPN Tunneling
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Tunneling
Encryption
Host 1
Internet
VPN Device
VPN Device
Host 2
Decryption
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Real Time Example
VPN
Software Company
Client
Wants to communicate
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Performance
Packet Reached The Destination
Packets On the Way to Destination
Internet
Packet
Source Router
Destination Router
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Performance In VPN Cntd..
Packet Reached The Destination
Packets On the Way to Destination
Internet
Packet
Source VPN Device
Destination VPN Device
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Advantages

• Extend geographic connectivity
• Improve security
• Reduce operational costs versus traditional WAN
  
• Provide global networking opportunities

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Conclusion
Once a Virtual Private Network tunnel is
established, the client computer is, for all
intents and purposes, networked with the server
or other computers at the servers location as if
connected via a local area network.