正确答案: B

100m

题目：介质100BaseT的最大传输距离是：()

解析：B

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举一反三的答案和解析：

[单选题]The Ezonexam network administrator has issued the "VTP password ezonexam" command on a Cisco device. What is the purpose of this command?

It is used to validate the sources of VTP advertisements sent between switches

[单选题]You have a class C network, and you need to design it for 5 usable subnets with each subnet handling a minimum of 18 hosts each. Which of the following network masks should you use?

255.255.255.224

解析：解析：Explanation:ThedefaultsubnetmaskforclassCnetworkis255.255.255.0.Ifonehastocreate5subnets,then3bitsarerequired.With3bitswecancreate8subnets.Theremaining5bitsareusedforHosts.Onecancreate30hostsusing5bitsinhostfield.Thismatcheswiththerequirement.IncorrectAnswers:A,B:ThisisanillegalsubnetmaskforaclassCnetwork,asthethirdoctetcannotbedividedwhenusingaclassCnetwork.C:ThisisthedefaultsubnetmaskforaclassCnetwork.Itprovidesforonenetwork,with254usablehostIPaddresses.E:Thissubnetmaskwillprovidefor14separatenetworkswith14hostseach.Thisdoesnotmeettherequirementofaminimumof18hosts.

[单选题]You want to upgrade the Ezonexam LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?

Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

[单选题]配置路由器时，封装PPP协议的命令是：()

encap ppp

[多选题]网络中经常使用“帧中继”服务，请选出帧中继的优点（）

偷占带宽

提供拥塞管理机制

灵活的接入方式

解析：ABD

[单选题]关于OSPF中DR的说法不正确的是（）

如果某路由器优先级比DR优先级高，但启动晚，它会抢占原来的DR自己成为DR

[多选题]As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)

It encourages industry standardization by defining what functions occur at each layer of the model

It divides the network communication process into smaller and simpler components; thus aiding component development, design and troubleshooting

解析：解析：Explanation:

[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP和掩码结合划分子网时，每个子网的容量为（）

6

[多选题]Which of the following steps are necessary in order to add a new VLAN to the Ezonexam switched network? (Select all that apply)

Create the VLAN.

Name the VLAN.

Add the desired ports to the new VLAN.

解析：解析：Explanation: