A.物理層B.數(shù)據(jù)鏈路層C.物理層和數(shù)據(jù)鏈路層D.數(shù)據(jù)鏈路層和網(wǎng)絡層
A.應用層 B.傳輸層 C.網(wǎng)絡層 D.網(wǎng)絡接口層
A.存儲系統(tǒng) B.轉(zhuǎn)發(fā)系統(tǒng) C.存儲-轉(zhuǎn)發(fā)系統(tǒng) D.傳輸-控制系統(tǒng)