单项选择题
You deployed new fibers in your network to replace copper spans that were too long. While reconnecting the network， you experienced network problems because you reconnected wrong fibers to wrong ports. What could you do to prevent this type of problem in the future， particularly when connecting and reconnecting fiber pairs？ （）
A. Only use fiber in pairs.
B. Configure root guard on your switches.
C. Do not use fiber but use copper.
D. Configure UDLD to prevent one-way link conditions.
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相关考题
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单项选择题
WhichfeaturewouldpreventguestusersfromgainingnetworkaccessbyunplugginganIPphoneandconnectingalaptopcomputer？（）
A.IPSec VPN
B.SSL VPN
C.port security
D.port security with statically configured MAC addresses
E.private VLANs -
多项选择题
Refertotheexhibit.TherearetwositesconnectedacrossWANlinks.Allintersiteandintrasitelinksalwayshavethesameroutingmetric.ThenetworkadministratorseesonlythetoproutersandlinksbeingusedbyhostsatbothLANAandLANB.Whatwouldbetwosuggestionstoload-balancethetrafficacrossbothWANlinks？（）
A. Make HSRP track interfaces between the edge and core routers.
B. Replace HSRP with GLBP. 用GLBP替换HSRP
C. Add crossed intrasite links： R1-R4， R2-R3， R5-R8， and R6-R7.
D. Make R3 and R8 have lower HSRP priority than R1 and R7.
E. Replace HSRP with VRRP -
多项选择题
Yournetworkissufferingfromregularoutages.Aftertroubleshooting，youlearnthatthetransmitleadofafiberuplinkwasdamaged.Whichtwofeaturescanpreventthesameissuesinthefuture？（）
A.root guard
B.loop guard
C.BPDU guard
D.UDLD
E.BPDU skew detection
