问题:
A . The MPLS header is 2 bytes,and the EXP field is 3 bits long.
B . The MPLS header is 1 byte,and the EXP field is 3 bits long.
C . The MPLS header is 4 bytes,and the EXP field is 3 bits long.
D . The MPLS header is 3 bytes,and the EXP field is 3 bits long.
● 参考解析
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