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Graphics Interchange Format  |  1999-03-17  |  41KB  |  653x266  |  4-bit (16 colors)
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OCR: IPK PPP How Tunneling Works, When a VPN device receives instructions to transmit a packet over the Internet, it negotiates encryption with the VPN device on the destination network, then encrypts the packet accordingly. Next, it encapsulates the encrypted packet in an IP packet and sends it over the Internet to the destination network. Once the packet arrives, the receiving VPN termination device reverses the process and lets the packet continue to its destination on the internal network