A.192.168.16.20B.192.168.16.30C.192.168.16.45D.192.168.16.57
A.傳播時(shí)延B.傳輸時(shí)延C.處理時(shí)延D.排隊(duì)時(shí)延
A.語法B.指令C.語義D.時(shí)序