As shown in the figure: IPsec VPN is used to transfer data between two hosts. In order to hide the real IP address and ensure the security of data as high as possible, which mode and protocol of IPsec VPN is better? (Multiple choice)

As shown in the figure: IPsec VPN is used to transfer data between two hosts. In order to hide the real IP address and ensure the security of data as high as possible, which mode and protocol of IPsec VPN is better? (Multiple choice)

A . AH
B . Tunnel mode
C . Transmission mode
D . ESP

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Answer: BD