[vpn] Doubts Regarding VPN

[poornima kalahasty]

Dear Sir/Madam

      I would like to clarify as to:
1) what are Pay sites and whether they can be called as VPNs?
2)What are tunnels? why do we go for tunnels in VPN?
can it be implemented without tunneling protocols?
3) what are standard tunneling protocols?
      Are they used in combination or separately?

Thanking you

yours truly
k.poornima


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