正确答案: C

标准ACL可以根据分组中的IP目标地址进行过滤

题目：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()。

解析：C

查看原题

举一反三的答案和解析：

[单选题]标准访问控制列表应被放置的最佳位置是在（）。

越靠近数据包的目的地越好

[多选题]CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)

To obtain the IP Address of a connected device in order to telnet to the device

To verify Layer 2 connectivity between two devices when Layer 3 fails

[单选题]Study the Exhibit below carefully:London#show vtp

Forwards information about VTP configuration.

解析：解析：Explanation:FromtheoutputthisswitchisoperatingmerelyasVTPclient,soitbasicallydoesastheVTPserversays,andpassesoninformationaboutVTPconfigurationtothenextswitchinline.IncorrectAnswers:A.Thisisincorrectbecausethefunctionisredundant.B.ThisincorrectbecausetheswitchmustbeinserverortransparentmodetocreateandchangeVLANs.D.ThisisincorrectbecauseifVTPwouldbedisabled,itwouldn'tappearonthecommandoutput.E.Ifthisweretrue,theVTPconfigurationinformationwouldnotbedisplayedafterbeingpoweredon.

[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，共划分了多少个子网（不包括全0子网和全1子网）（）

30

[单选题]路由器上的命令“show version”的功能是（）

显示版本信息

[单选题]The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?

1 network with 254 hosts

解析：解析：Explanation:Asubnetwith24bitsonwouldbe255.255.255.0.SincethisisaclassCnetwork,thissubnetcanhaveonly1networkand254usablehosts.

[单选题]TCP23是（）协议端口号；UDP69是（）端口号；TCP80是（）端口号。

TELNET TFTP HTTP

[单选题]How many usable IP addresses can you get from a conventional Class C address?

254

解析：解析：Explanation: