Question

The sending host on a site-to-site VPN that is constructed by using GRE with IPSec for transport encrypts a new packet. Which of the following steps occurs next?

a. The sending host adds a VPN header and an IP header
b. The sending host sends the packet to the destination
c. The receiving host decrypts the packet
d. The sending host adds the session key to the packet

Answer 1

After a new packet is encrypted by the sending host in a site-to-site VPN using GRE with IPSec, the host adds a VPN header and an IP header before transmission.

Step-by-step explanation:

When a sending host on a site-to-site VPN using GRE with IPSec encrypts a new packet, the next step in the process is for the sending host to add a VPN header and an IP header to the packet. This is done prior to transmitting the encrypted data over the internet.

To clarify, the correct sequence after encryption is: first, the VPN's GRE header is applied to encapsulate the original packet, followed by the IPSec header (and trailer) to provide encryption and security. Finally, an IP header is added so that the packet can be properly routed through the Internet to the destination.

he correct next step after encrypting the packet on a site-to-site VPN that uses GRE with IPSec for transport is:

The sending host adds a VPN header and an IP header

The VPN header provides the necessary information for the VPN connection, and the IP header includes the source and destination IP addresses.