Tunneling Illustrated

Router A

Workstation

X

Router B

Workstation

Y

Original IP

packet dest Y

Step 1.

Original, unroutable

IP Packet sent to router

Step 2

Original IP

packet

encapsulated

in another IP

packet

Original IP

packet

New IP

Packet

Tunnel

Step 3

Original packet

extracted, sent

to destination

Original IP

packet dest Y

Tunnel

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