使用 switchport port-security 命令的影响是什么?()
A.启用接口上的端口安全
B.全局启用交换机上的端口安全
C.自动关闭接口(若应用至中继端口)
D.检测进入端口的帧中的第一个 MAC 地址,并将该 MAC 地址置于 MAC 地址表中
A.启用接口上的端口安全
B.全局启用交换机上的端口安全
C.自动关闭接口(若应用至中继端口)
D.检测进入端口的帧中的第一个 MAC 地址,并将该 MAC 地址置于 MAC 地址表中
第1题
A.当需要保护未使用的交换机端口时
B.当只允许一台主机设备连接到端口时
C.当想使端口识别MAC地址表中静态分配的MAC地址时
D.当多台设备共用同一端口时
第2题
A.Thehostwillbeallowedtoconnect.
B.Theportwillshutdown.
C.Thehostcanonlyconnectthroughahub/switchwhere0002.0002.0002isalreadyconnected.
D.Thehostwillberefusedaccess.
E.Noneoftheotheralternativesapply
第3题
B、RAM
C、NVRAM
D、闪存
第4题
A.TheportwillpermitthenewMACaddressbecauseoneormoreoftheoriginalMACaddressesareinactive.
B.TheportwillpermitthenewMACaddressbecauseoneormoreoftheoriginalMACaddresseswillageout.
C.BecausethenewMACaddressisnotconfiguredontheport,theportwillnotpermitthenewMACaddress.
D.AlthoughoneormoreoftheoriginalMACaddressesareinactive,theportwillnotpermitthenewMACaddress.
第5题
Ezonexam3(config-if) switchport port-security
Ezonexam3(config-if) switchport port-security mac-address sticky
Select the action below that results from executing these commands.
A. A dynamically learned MAC address is saved in the VLAN database.
B. A dynamically learned MAC address is saved in the startup-configuration file.
C. Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
D. A dynamically learned MAC address is saved in the running-configuration file.
E. Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.
F. None of the above
第6题
A.A dynamically learned MAC address is saved in the startup-configuration file.
B.A dynamically learned MAC address is saved in the running-configuration file.
C.A dynamically learned MAC address is saved in the VLAN database.
D.Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
E.Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.
第7题
A.AdynamicallylearnedMACaddressissavedinthestartup-configurationfile.
B.AdynamicallylearnedMACaddressissavedintherunning-configurationfile.
C.AdynamicallylearnedMACaddressissavedintheVLANdatabase.
D.StaticallyconfiguredMACaddressesaresavedinthestartup-configurationfileifframesfromthataddressarereceived.
E.StaticallyconfiguredMACaddressesaresavedintherunning-configurationfileifframesfromthataddressarereceived.
第9题
【说明】
某企业的网络拓扑结构如图3-1所示,随着企业内部网络的不断扩大,为了企业内网的安全,现要求利用VTP协议快速实现企业内网的VLAN配置以解决广播风暴的问题, 同时要求使用地址绑定技术解决
网络中的地址冲突以及地址欺骗等现象。
图3-1
【问题1】(4分)
在没有配置VLAN之前,由交换机互连的网络默认同属于(1)。为了解决链路通过多条VLAN的问题,交换机的端口被定义为三种模式,分别为(2)、(3)以及(4)。(1)~(4)备选答案如下:
A.VLANO B.VLAN1 C.VLAN2 D.access
E.trunk F.dynamic G.server H.client
【问题2】(10分)
网络环境中经常会出现地址冲突、地址欺骗等现象,为了解决这种问题,请使用地址绑定技术在交换机Switch2上实现对主机PC1(MAC地址为0001.ABCD.32EA)基于端口的MAC地址绑定,请补充完成下列配置命令。
Switch2> (5) //进入特权模式
Switch2 (6) //进入全局配置模式
Switch2(config) (7) F0/2 //进入端口 F0/2 配置模式
Switch2(config-if)switchport (8) //配置开启端口安全模式
Switch2(config-if)switchport port-security (9) 0001.ABCD.32EA
//将PC1MA地址0001.ABCD.32EA绑定到该端口
......
【问题3】(3分)
使用VTP快速配置企业网络VLAN,请完成相关配置命令。
1.在三台交换机(Switch-1、Switch-2和Switch-3)上分别配置VTP协议,将Switch-1设为服务器模式,Switch-2和Switch-3设为客户机模式。
Switch-1:
Switch-1(VLAN) (10) //定义 Switch-1为VTP服务器模式
Switch-1(VLAN) vtp domain cisco
Switch-1(VLAN) vtp password cisco
Switch-2:
Switch-2(VLAN) vtp domain cisco //&39;定义 Switch-2的VTP 域
Switch-2(VLAN) vtp client
Switch-2(VLAN) (11) //定义 Switch-2的VTP 域验证密码
......
2.配置trunk接口及验证VTP Switch-1:
Switch-1(config) int f0/1
Switch-1(config-if) switchport trunk encapsulationdotlq //指定封装类型
Switch-l(config-if) switchport mode (12) //配置该接口为 trunk 模式
......
Switch-3:
Switch-3(config) interface fastEthernet 0/1 //进入Switch-3的接口配置子模式
Switch-3(config-if) switchport trunk encapsulationdotlq //指定封装类型
Switch-3 showVLAN //在 Switch-3 上查看VLAN信息,验证VTP
......
【问题4】(3分)
网络系统建设过程中,网络交换设备的质量、性能、功能等因素直接与网络系统的整体性能相关。衡量网络交换设备性能最主要的指标有(13) 、 (14)和(15)。(13)~(15)备选答案如下:
A.端口转发速率 B.传输时延 C.包转发率 D.额定功率
E.端口类型 F.背板容量
第10题
A.InterfaceFastEthernet0/1wasconfiguredwiththeswitchportport-securityagingcommand.
B.InterfaceFastEthernet0/1wasconfiguredwiththeswitchportport-securityprotectcommand.
C.InterfaceFastEthernet0/1wasconfiguredwiththeswitchportport-securityviolationrestrictcommand.
D.WhenthenumberofsecureIPaddressesreaches10,theinterfacewillimmediatelyshutdown.
E.WhenthenumberofsecureMACaddressesreaches10,theinterfacewillimmediatelyshutdownandanSNMPtrapnotificationwillbesent.
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