A.MD5 B.There is no Type 0 authentication C.SHA1 D.Null
A.UDP/1812 B.UDP/1813 C.TCP/1812 D.TCP/1813
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.