首页 >计算机类 >思科认证 > >Which one of the following characteristics is true regarding the use of hubs and switches?

Which one of the following characteristics is true regarding the use of hubs and switches?

时间:2019-10-25 07:00浏览次数:

A.Hubs can have their ports be configured with VLANs

B.Using hubs is costly with regard to bandwidth availability.

C.Switches can not forward broadcasts.

D.Switches are more efficient than hubs in processing frames.

E.Switches increase the number of collision domains in the network.

参考答案

正确答案:E
解析:Explanation:Switchesincreasesthenumberofcollisionsdomainsinthenetwork.SwitchesthatareconfiguredwithVLANswillreducethesizeofthecollisiondomainsbyincreasingthenumberofcollisiondomainsinanetwork,butmakingthemsmallerthanthatofonebig,flatnetwork.IncorrectAnswers:A.SwitchesarecapableofVLANconfigurations,buthubsarenot.B.Hubsaregenerallytheleastcostlymethodpossibletoconnectmultipledevicestogetherinanetwork.C.Switchesforwardbroadcastsandmulticasts,bydefault,toallportswithinthesameVLAN.Onlyroutersblockallbroadcasttrafficbydefault.D.Switchesandhubscanbeequallyefficientinprocessingframes,intheory.Inpractice,switchesaregenerallymoreefficientastheyusuallyhavemoreCPUandmemoryallocatedtothem,andaregenerallymuchmoreexpensivethanasimplehub.

    阅读排行