正确答案: A

两者没有什么区别

题目：通配符掩码和子网掩码之间的关系是（）。

解析：A

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举一反三的答案和解析：

[单选题]PPP工作在OSI的哪一层（）

数据链路层

[单选题]扩展ACL和标准ACL的区别（）。

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]扩展IP访问权限表的表号范围是：()

100-199

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

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]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?

All defined VLANs are allowed on the trunk by default.

解析：解析：Explanation:

[多选题]Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)

The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.

The DHCP Discover message uses UDP as the transport layer protocol.

解析：A,B 解析：Explanation:

[单选题]Assuming you build networks to exact specifications, what is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?

100 meters

解析：解析：Explanation:

[单选题]“ipaccess-group”命令在接口上缺省的应用方向是什么"（）。

out