[单选题]下面哪个操作可以使访问控制列表真正生效（）。

正确答案 ：A

将访问控制列表应用到接口上

[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)

正确答案 ：BD

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]The Ezonexam network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test? (Choose two)

正确答案 ：AE

ARP

ICMP

解析：解析：Explanation:ARPfindsthehardwareaddressofahostfromaknownIPaddress.Here'showitworks:whenIPhasadatagramtosend,itmustinform.aNetworkAccessprotocol,suchasEthernetorTokenRing,ofthedestination'shardwareaddressonthelocalnetwork.(Ithasalreadybeeninformedbyupper-layerprotocolsofthedestination'sIPaddress.)IfIPdoesn'tfindthedestinationhost'shardwareaddressintheARPcache,itusesARPtofindthisinformation.ICMPworksattheNetworklayerandisusedbyIPformanydifferentservices.ICMPisamanagementprotocolandmessagingserviceproviderforIP.ItsmessagesarecarriedasIPdatagrams.RFC1256isanannextoICMP,whichaffordshosts'extendedcapabilityindiscoveringroutestogateways.Periodically,routeradvertisementsareannouncedoverthenetwork,reportingIPaddressesfortherouter'snetworkinterfaces.Hostslistenforthesenetworkinfomercialstoacquirerouteinformation.Aroutersolicitationisarequestforimmediateadvertisementsandmaybesentbyahostwhenitstartsup.

[单选题]路由器“路由模式”的提示符号是（）

正确答案 ：D

(config-router)

[单选题]介质工作在OSI的哪一层（）

正确答案 ：A

物理层

[单选题]为了禁止网络210.93.105.0ftp到网络223.8.151.0，允许其他信息传输，则能实现该功能的选项是：()

正确答案 ：D

access-list 100 deny tcp 210.93.105.0 0.0.0.255 223.8.151.00.0.0.255 eq ftp access list 100 permit ip any any

[单选题]为了阻止交换机环路，交换机上所采用的技术为（）

正确答案 ：B

生成树协议

[单选题]标准访问控制列表应被放置的最佳位置是在（）。

正确答案 ：B

越靠近数据包的目的地越好

[单选题]帧中继环境下，为了区分虚电路，应该使用的地址是（）

正确答案 ：C

DLCI

[单选题]下面对Cisco2621路由器和Cisco2501路由器描述中，错误的是（）

正确答案 ：C

Cisco2501上提供一个100Mbit/s的快速以太网端口

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