题目内容
(请给出正确答案)
[单选题]
At which of the following layers does the TFTP protocol operate?()
A.Layer 1
B.Layer 4
C.Layer 5
D.Layer 7
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A.Layer 1
B.Layer 4
C.Layer 5
D.Layer 7
第1题
A.Networkisunavailable
B.Thebackupsoftwareismisconfigured
C.Thecurrentbackuptapeisbad
D.Thewrongsizebackuptapeswereloaded
第3题
Anadministratorisworkingonarackmountserverwithallnewlyinstalledequipment.Theuninterruptiblepowersupply(UPS)intherackstartsbeepingloudly.Whichofthefollowingisthe FIRSTtroubleshootingstepthatshouldbetaken?()
A.EnsurethatthepowercablefortheUPSispluggedin.
B.EnsurethebatteryintheUPSisstillgood.
C.CheckthesmartcableconnectingtheUPStotheserver.
D.ResettheUPStodetermineiftheproblempersists.
第4题
A. Public key
B. CSU/DSU
C. Private key
D. Shared secret
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