A.10Base-5 B.10Base-2 C.10Base-T D.FDDI
A.1 B.2 C.3 D.4
A.數(shù)字信號(hào) B.模擬信號(hào) C.數(shù)字或模擬信號(hào) D.數(shù)字脈沖信號(hào)