单选题What is the port number of the IPsec Authentication Header packet？（）AIP protocol 50BTCP port 51CUDP port 50DIP protocol 51EUDP port 51FTCP port 50
单选题
What is the port number of the IPsec Authentication Header packet？（）
A
IP protocol 50
B
TCP port 51
C
UDP port 50
D
IP protocol 51
E
UDP port 51
F
TCP port 50
参考解析
解析：
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