When the firewall uses the IPsec function, which protocols and ports need to be opened? (Multiple Choice)

When the firewall uses the IPsec function, which protocols and ports need to be opened? (Multiple Choice)
A . The protocols are IP packets with AH and ESP.
B. UDP packets with source ports 500 and 4500.
C. UDP packets with destination ports 500 and 4500.
D. UDP packets with destination port 1701.

Answer: AC

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