A.物理層，網(wǎng)絡層，數(shù)據(jù)鏈路層
B.網(wǎng)絡層，數(shù)據(jù)鏈路層，傳輸層
C.數(shù)據(jù)鏈路層，網(wǎng)絡層，傳輸層
D.物理層，數(shù)據(jù)鏈路層，傳輸層

A.Router#copy startup-config tftp
B.Router#copy flash tftp
C.Router#copy running-config tftp
D.Router#copy tftp running-config