Virtual%20Private%20Network

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Virtual Private Network
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VPN

• In the most basic definition, VPN is a connection
  which allows 2 computers or networks to
  communicate with each other across a public
  network.
• It is a very good way to secure connection
  problems.

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The data is sent between the 2 computers or
networks through a virtual tunnel.

• The virtual tunnel is the key component of the
  VPN because it forms a private link among the
  computers and networks.

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Virtual Tunnel

• The point-to-point connection that supports the
  encryption and the authentication of the data
  being transferred.
• Tunnel allows the data to pass through in a
  secure way.

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How is the tunnel created ?

• encapsulation of data for transition
• forming a fake address
• conversion of the data to its original state

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Advantages of VPN

• saves money/ no additional equipment is needed
  (phones etc.)
• it allows anyone with a good direct internet
  connection to reach their data.
• provides a extranet connecting clients and
  workers.

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Types of VPN connections

• User to network
• Network to network

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3 different protocols under VPN

• Point-to-point Tunneling Protocol (PPTP)
• Layer 2 Protocol (L2TP)
• Internet Protocol Security (IPSec)