单项选择题 11securityisdefinedin：（）

单项选择题 Whichofthefollowingistheprimarypurposeofimpedancematchedvolumecontrol？（）

单项选择题 WhatisthemaximumnumberofexternalDHCPserverspervirtualrouterinaBridged1483network？（）

单项选择题 AserverisconnectedtoagigabitEthernetswitchandhasnegotiated1Gbps/FullDuplex.When transferringlargefilestoandfromotherserversonthesegmentviaFTPslowperformanceisnoticed.Allnetworkcabling，networkhardwareandserverhardwarewereverifiedtobeworkingcorrectly.Which ofthefollowingcouldbedonetoimproveperformance？（）A.DecreasetheTCPwindowsize.B.IncreasetheUDPwindowsize.C.IncreasetheTCPwindowsize.D.DecreasetheUDPwindowsize.

单项选择题 Whichofthefollowingtechnologiescansaveserverspaceandcoolingrequirements？（）