Which encryption mode is used when a packet is sent from a site-to-site VPN connection where the source and destination IP address portion of a packet is unencrypted?
these are all terrible, but i guess C is the least wrong.
you wouldn't use transport mode for a site-to-site VPN, you would use tunnel mode every time. transport is only really used for individual device connections like client to server.
In transport mode, only the payload (the actual data being transferred) of the IP packet is encrypted, leaving the header (which includes the source and destination IP addresses) unencrypted.
C. Transport
In the context of VPNs (Virtual Private Networks), when the source and destination IP address portion of a packet is unencrypted while the actual payload of the packet is encrypted, it is using transport mode encryption.
Transport mode encrypts only the data portion (payload) of the IP packet, leaving the header (which includes the source and destination IP addresses) unencrypted. This is often used in site-to-site VPNs where the devices at the ends of the VPN tunnel are responsible for the IP header information.
Therefore, option C (Transport) is the correct answer.
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