单选题On which destination port in the Layer 4 header does BGP listen?（）AUDP port 169BTCP port 169CUDP port 179DTCP port 179
单选题
On which destination port in the Layer 4 header does BGP listen?（）
A
UDP port 169
B
TCP port 169
C
UDP port 179
D
TCP port 179
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解析：
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