Which one of the following characteristics is
问题详情
Which one of the following characteristics is true regarding the use of hubs and switches？
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.请帮忙给出正确答案和分析，谢谢！
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.
