When a site-to-site VPN is configured, which IPsec mode provides encapsulation and encryption of the entire original IP packet?

When a site-to-site VPN is configured, which IPsec mode provides encapsulation and encryption of the entire original IP packet?
A . IPsec tunnel mode with AH
B . IPsec transport mode with AH
C . IPsec tunnel mode with ESP
D . IPsec transport mode with ESP

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Answer: C