[单选题]如果把路由器的某个端口的IP配置为：192.168.10.64，掩码配置为：255.255.255.248，则该端口（）

正确答案 ：B

会变成“administratively down”状态

[单选题]EIGRP的管理距离（）

正确答案 ：C

110

[单选题]OSI七层模型中，“段”是哪一层数据封装的名称（）

正确答案 ：D

传输层

[单选题]Ezonexam has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?

正确答案 ：B

VTP will allow switches to share VLAN configuration information

[单选题]通过路由器的“配置端口console”对路由器进行配置，应该使用的线缆为（）

正确答案 ：C

反转线缆

[多选题]Regarding the extended ping command; which of the statements below are true?(Select all valid answer choices)

正确答案 ：BDE

The extended ping command is available from privileged EXEC mode.

With the extended ping command you can specify the timeout value.

With the extended ping command you can specify the datagram size.

解析：解析：Explanation:

[多选题]属于私有IP段的是()

正确答案 ：ABD

10.0.0.0-10.255.255.255

172.16.0.0-172.31.255.255

192.168.0.0-192.168.255.255

解析：ABD

[单选题]扩展ACL和标准ACL的区别（）。

正确答案 ：B

扩展的ACL核查数据包的源地址和目标地址和端口号

[单选题]Which one of the following characteristics is true regarding the use of hubs and switches?

正确答案 ：E

Switches increase the number of collision domains in the network.

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

[单选题]SMTP工作在OSI哪一层（）

正确答案 ：D

应用层

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