正确答案: D

OSPF

题目：下列路由协议中，属于链路状态路由协议的是（）

解析：D

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举一反三的答案和解析：

[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）

show interface e0

[单选题]下列哪一个通配符掩码与子网172.16.64.0/27的所有主机匹配（）。

0.0.0.31

[单选题]交换机工作在OSI七层模型的哪一层()

数据链路层

[多选题]The Ezonexam network administrator wants to ensure that only a single web server can connect to pot Fa0/1 on a catalyst switch. The server is plugged into the switch's Fast Eth. 0/1 port and the network administrator is about to bring the server online. What can the administrator do to ensure that only the MAC address of this server is allowed by switch port Fa0/1? (Choose two)

Configure the MAC address of the server as a static entry associated with port Fa0/1

Configure port security on Fa0/1 to reject traffic with a source MAC address other than that of the server

解析：解析：Explanation:

[多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)

A device listens and waits until the media is not busy before transmitting.

All devices on an Ethernet segment see data that passes on the network medium.

解析：解析：Explanation:

[单选题]下列对访问控制列表的描述不正确的是（）。

访问控制列表可以应用于路由更新的过程当中

[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:

[单选题]访问控制列表分为标准和扩展两种。下面关于ACL的描述中，错误的是()。

标准ACL可以根据分组中的IP目标地址进行过滤

[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.