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单项选择题Which of the following is true about the MPLS header and its EXP field size?()

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.

  • C
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