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单项选择题 Click the Exhibit button. [A] establishes an IPsec tunnel with [B]. The NAT device translates the IP address 1.1.1.1 to 2.1.1.1.On which port is the IKE SA established?()

A、TCP 500

B、UDP 500

C、TCP 4500

D、UDP 4500

  • D
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