A switch that is to be added to the production network has been preconfigured （trunks， VLANs， VTP， and STP） and was tested in your lab. After installing the switch into the network， the entire network went down.  What might explain what happened？ （）A、The

题目

A switch that is to be added to the production network has been preconfigured （trunks， VLANs， VTP， and STP） and was tested in your lab. After installing the switch into the network， the entire network went down.  What might explain what happened？ （）

  • A、The new switch happened to be running Cisco Catalyst operating system， while the other network switches were running Cisco IOS Software.
  • B、The configuration revision of the new switch was higher than the configuration revision of the production VTP domain.
  • C、The link costs on the new switch are set to a high value， causing all ports on the new switch to go into a forwarding mode and none into blocking mode， thereby causing a spanning-tree loop.
  • D、The ports connecting to the two switches have been configured incorrectly. One side has the command switchport mode access and the other switchport mode trunk.
相似考题

1.交换机当前状态处于局部配置模式的是()。A、switch>B、switch#C、switch(config-if)#D、switch(config)#

2.A Ezonexam Ethernet switch receives a unicast frame. with a destination MAC that is listed in the switch table. What will this switch do with the frame?A. The switch will forward the frame. to a specific portB. The switch will forward the frame. to all ports except the port on which it was receivedC. The switch will return a copy of the frame. out the source portD. The switch will not forward unicast framesE. The switch will remove the destination MAC from the switch tableF. None of the above.

3.若a和b均是整型变量并已正确赋值，则正确的switch语句是( )。A．switch (a+b)；B．switch (a+b * 3.0) {......}{.......}C．switch aD．switch(a% b) {......}{......}

4.若a和b均是整型变量并已正确赋值，正确的switch语句是A．switch(a+b)；{……}B．switch(a+b*3.0){……}C．switch a{……}D．switch(a％b){……}

更多“A switch that is”相关问题

  • 第1题：

    WhichthreeresourceplanparametersareusedtoenableAutomaticConsumerGroupSwitchingtoestimatejobexecutiontimesautomatically,andtoperformaswitchtoalowpriorityconsumergroupbeforetheyareinitiated?()

    A.SWITCH_TIME

    B.SWITCH_GROUP

    C.MAX_SESS_POOL

    D.SWITCH_ESTIMATE


    参考答案：A, B, D

  • 第2题：

    Whichofthefollowingcommandscanbeissuedwithoutinterferingwiththeoperationofloopguard?()

    A.Switch（config-if）#spanning-treeguardroot

    B.Switch（config-if）#spanning-treeportfast

    C.Switch（config-if）#switchportmodetrunk

    D.Switch（config-if）#switchportmodeaccess


    参考答案：C

  • 第3题：

    Refer to the exhibit. What switch proves the spanning－tree designated port role for the network segment that services the printers?()

    A.Switch1

    B.Switch2

    C.Switch3

    D.Switch4


    参考答案：C

  • 第4题：

    Refertotheexibit.Threecisco2950switchesaresettotheirdefaultprioritysettings.Duringthespanning－treeprocess,whichswitchwillbeelectedastherootbridge?()

    A.Switch3

    B.Switch4

    C.Switch2

    D.Switch1


    参考答案：D

  • 第5题：

    A new Catalyst switch is connected to an existing switch using a crossover cable. As a result of this, what would the switch port link lights display?（）

    • A、The switch port link lights will be off on both switches indicating the ports are not connected.
    • B、The switch port link light will be off on one switch indicating that STP has disabled the port.
    • C、The switch port link lights will flash amber indicating an error.
    • D、The switch port link lights will be green indicating normal operation.

    正确答案:D

  • 第6题：

    打开锚灯！ （）

    • A、Switch on the deck light!
    • B、Switch on the anchor light!
    • C、Switch on the cargo light!
    • D、Switch on the hold light!

    正确答案:B

  • 第7题：

    What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table?（）

    • A、The switch will not forward unicast frames.
    • B、The switch will forward the frame to a specific port.
    • C、The switch will return a copy of the frame out the source port.
    • D、The switch will remove the destination MAC from the switch table.
    • E、The switch will forward the frame to all ports except the port on which it was received.

    正确答案:B

  • 第8题：

    What are two results of entering the Switch(config)# vtp mode client command on a Catalyst switch?（）

    • A、The switch will ignore VTP summary advertisements
    • B、The switch will forward VTP summary advertisements
    • C、The switch will process VTP summary advertisements
    • D、The switch will originate VTP summary advertisements
    • E、The switch will create, modify and delete VLANs for the entire VTP domain

    正确答案:B,C

  • 第9题：

    下面哪种提示符表示交换机现在处于特权模式？（）

    • A、Switch＞
    • B、Switch#
    • C、Switch（config）#
    • D、Switch（config-if）#

    正确答案:B

  • 第10题：

    多选题
    What are two results of entering the Switch(config)# vtp mode client command on a Catalyst switch?（）
    A

    The switch will ignore VTP summary advertisements

    B

    The switch will forward VTP summary advertisements

    C

    The switch will process VTP summary advertisements

    D

    The switch will originate VTP summary advertisements

    E

    The switch will create, modify and delete VLANs for the entire VTP domain


    正确答案： B,E
    解析： 暂无解析

  • 第11题：

    单选题
    Refer to the exhibit. What switch proves the spanning-tree designated port role for the network segment that services the printers?（）
    A

    Switch1

    B

    Switch2

    C

    Switch3

    D

    Switch4


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table（）。
    A

    The switch will not forward unicast frames.

    B

    The switch will forward the frame to a specific port.

    C

    The switch will return a copy of the frame out the source port.

    D

    The switch will remove the destination MAC from the switch table.

    E

    The switch will forward the frame to all ports except the port on which it was received.


    正确答案： E
    解析： 暂无解析

  • 第13题：

    AutomaticConsumerGroupSwitchingisanimportantnewfeatureoftheDatabaseResourceManager.Whichthreeplandirectiveparametersareusedtocontrolthisfeature?()

    A.SWITCH_TIME

    B.SWITCH_GROUP

    C.MAX_SESS_POOL

    D.SWITCH_ESTIMATE


    参考答案：A, B, D

  • 第14题：

    AVTPdomainhassixactiveVLANs.Withoutnotice,allVLANsexceptVLAN1fail.Justpriortothefailure,Switch2wasaddedtothenetwork.WhichthreeissuesonSwitch2couldbethecause?()

    A.Switch2isconfiguredforonlyVLAN1

    B.Switch2isaVTPserverinadifferentdomain

    C.Switch2isaVTPserverintheCompanydomain

    D.Switch2isnotaVTPdomain.

    E.Switch2hasalowerVTPconfigurationrevisionnumberthanthecurrentVTPrevision

    F.Switch2hasahigherVTPconfigurationrevisionnumberthanthecurrentVTPrevision


    参考答案：A, C, F

  • 第15题：

    What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table()。

    A.The switch will not forward unicast frames.

    B.The switch will forward the frame to a specific port.

    C.The switch will return a copy of the frame out the source port.

    D.The switch will remove the destination MAC from the switch table.

    E.The switch will forward the frame to all ports except the port on which it was received.


    参考答案：B

  • 第16题：



    管理员要求能确保Vlan10和Vlan20能互通，并且Vlan20的用户访问外网时，使用10.1.30.1作为出口，二Vlan10的用户访问外网时，使用10.1.20.1作为出口，因此考虑使用策略路由。具体配置如下：
    [Switch] acl 3000
    [Switch-acl-adv-3000] rule permit ip source 192.168.1.0 0.0.0.255 destination 192.168.2.0 0.0.0.255
    [Switch-acl-adv-3000] rule permit ip source 192.168.2.0 0.0.0.255 destination 192.168.1.0 0.0.0.255
    Switch-acl-adv-3000] quit
    ?
    [Switch] acl 3001?//匹配内网192.168.1.0/24网段的数据流
    [Switch-acl-adv-3001]?（1）
    [Switch-acl-adv-3001] quit
    [Switch] acl 3002?//匹配内网192.168.2.0/24网段的数据流
    [Switch-acl-adv-3002] rule permit ip source 192.168.2.0 0.0.0.255
    [Switch-acl-adv-3002] quit
    ?
    [Switch] traffic classifier c0 operator or
    [Switch-classifier-c0]?（2）
    [Switch-classifier-c0] quit
    [Switch]?（3）
    [Switch-classifier-c1] if-match acl 3001
    [Switch-classifier-c1] quit
    [Switch] traffic classifier c2 operator or
    [Switch-classifier-c2] if-match acl 3002
    [Switch-classifier-c2] quit
    [Switch] traffic behavior b0
    [Switch-behavior-b0]?（4）
    [Switch-behavior-b0] quit
    [Switch] traffic behavior b1
    [Switch-behavior-b1]?（5）
    [Switch-behavior-b1] quit
    [Switch] traffic behavior b2
    [Switch-behavior-b2] redirect ip-nexthop 10.1.30.1
    [Switch-behavior-b2] quit
    ?[Switch]（6）
    [Switch-trafficpolicy-p1]?（7）
    [Switch-trafficpolicy-p1] classifier c1 behavior b1
    [Switch-trafficpolicy-p1] classifier c2 behavior b2
    [Switch-trafficpolicy-p1] quit
    [Switch] interface gigabitethernet 1/0/3
    [Switch-GigabitEthernet1/0/3]?（8）
    问题1：简要叙述ACL3000在此配置中的作用是什么？
    问题2：请完成（1）-（8）空的命令填空


    答案：
    解析：
    （1）rule permit ip source 192.168.1.0 0.0.0.255或者 rule? [数字编号] permit ip source 192.168.1.0 0.0.0.255
    （2）if-match acl 3000
    （3）traffic classifier c1 operator or
    （4）permit
    （5）redirect ip-nexthop 10.1.20.1
    （6）traffic policy p1
    （7）classifier c0 behavior b0
    （8）traffic-policy p1 inbound
    【解析】
    试题分析：
    传统的路由转发原理是首先根据报文的目的地址查找路由表，然后进行报文转发。但是目前越来越多的用户希望能够在传统路由转发的基础上根据自己定义的策略进行报文转发和选路。策略路由PBR（Policy-Based Routing）就是一种依据用户制定的策略进行数据转发的机制。在某些需要指定特定的数据流走特定的下一跳的场景下可以使用策略路由实现，例如使不同的数据流通过不同的链路进行发送，提高链路的利用效率；将数据流引流到防火墙等安全设备，进行安全过滤；在满足业务服务质量的前提下，选择费用较低的链路传输业务数据，从而降低企业数据服务的成本。策略路由主要配置在于如何利用ACL区分数据，然后再使用PBR设定对应的数据流使用redirect ip-nexthop命令或redirect ipv6-nexthop（对应IPv6数据）命令设置下一跳即可解决。具体配置过程如下：1. 创建VLAN并配置各接口，配置路由等，保证IP网络连通。2. 配置ACL规则，不同网段的数据流。3. 配置流分类，匹配规则为对应的ACL规则，使设备可以对报文进行区分。4. 配置流行为，使满足不同ACL规则的数据流走不同的链路，此时要特别注意的是：先把内网互访的数据流放行。5. 配置流策略，绑定上述流分类和流行为，并应用到对应设备接口的入方向，实现策略路由。本题不涉及基本IP网路连通的配置，因此只要从第2步开始即可。配置ACL规则# 在Switch上创建编码为3000、3001、3002的高级ACL。[Switch] acl 3000 //主要用于匹配内网两个网段之间互访的数据流，这部分数据流不需要做重定向，如果不配置这一步会导致内网之间互访的流量也被重定向，从而导致内网互访不通。[Switch-acl-adv-3000] rule permit ip source 192.168.1.0 0.0.0.255 destination 192.168.2.0 0.0.0.255[Switch-acl-adv-3000] rule permit ip source 192.168.2.0 0.0.0.255 destination 192.168.1.0 0.0.0.255Switch-acl-adv-3000] quit[Switch] acl 3001 //匹配内网192.168.1.0/24网段的数据流[Switch-acl-adv-3001] rule permit ip source 192.168.1.0 0.0.0.255[Switch-acl-adv-3001] quit[Switch] acl 3002 //匹配内网192.168.2.0/24网段的数据流[Switch-acl-adv-3002] rule permit ip source 192.168.2.0 0.0.0.255[Switch-acl-adv-3002] quit步骤3 配置流分类在Switch上创建流分类c0、c1、c2，匹配规则分别为ACL 3000、ACL 3001和ACL3002。[Switch] traffic classifier c0 operator or[Switch-classifier-c0] if-match acl 3000[Switch-classifier-c0] quit[Switch] traffic classifier c1 operator or[Switch-classifier-c1] if-match acl 3001[Switch-classifier-c1] quit[Switch] traffic classifier c2 operator or[Switch-classifier-c2] if-match acl 3002[Switch-classifier-c2] quit步骤4 配置流行为# 在Switch上创建流行为b0、b1、b2，对于b0只配置permit的动作，对于b1和b2分别指定重定向到10.1.20.1和10.1.30.1的动作。[Switch] traffic behavior b0[Switch-behavior-b0] permit[Switch-behavior-b0] quit[Switch] traffic behavior b1[Switch-behavior-b1] redirect ip-nexthop 10.1.20.1[Switch-behavior-b1] quit[Switch] traffic behavior b2[Switch-behavior-b2] redirect ip-nexthop 10.1.30.1[Switch-behavior-b2] quit步骤5 配置流策略并应用到接口上# 在Switch上创建流策略p1，将流分类和对应的流行为进行绑定。[Switch] traffic policy p1[Switch-trafficpolicy-p1] classifier c0 behavior b0[Switch-trafficpolicy-p1] classifier c1 behavior b1[Switch-trafficpolicy-p1] classifier c2 behavior b2[Switch-trafficpolicy-p1] quit# 将流策略p1应用到Switch的GE1/0/3的入方向上。[Switch] interface gigabitethernet 1/0/3[Switch-GigabitEthernet1/0/3] traffic-policy p1 inbound

  • 第17题：

    In which of the following lists of APS Action Requests is the priority correctly arranged from lowest tohighest？（）

    • A、Wait-to-Restore，Forced Switch，Manual Switch，Lockout of Protection
    • B、Manual Switch，Wait-to-Restore，Lockout of Protection，Forced Switch
    • C、Lockout of Protection，Forced Switch， Manual Switch，Wait-to-Restore
    • D、Lockout of Protection，Manual Switch， Forced Switch，Wait-to-Restore
    • E、Wait-to-Restore，Manual Switch，Forced Switch，Lockout of Protection
    • F、Wait-to-Restore，Manual Switch，Lockout of Protection，Forced Switch

    正确答案:E

  • 第18题：

    What are two results of entering the Switch(config)# vtp mode client command on a Catalyst switch?（）

    • A、The switch will ignore VTP summary advertisements.
    • B、The switch will forward VTP summary advertisements.
    • C、The switch will process VTP summary advertisements.
    • D、The switch will originate VTP summary advertisements.
    • E、The switch will create, modify and delete VLANs for the entire VTP domain.

    正确答案:B,C

  • 第19题：

    Given the output of the Floor3 switch, what statement describes the operation of this switch（）。

    • A、VTP is disabled on this switch.
    • B、The switch can create, change, and delete VLANs.
    • C、The switch learns VLAN information but does not save it to NVRAM.
    • D、The switch can create VLANs locally but will not forward this information to other switches.
    • E、The switch learns VLAN information and updates the local VLAN data base in NVRAM.

    正确答案:C

  • 第20题：

    Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）

    • A、the switch with the lowest MAC address
    • B、the switch with the higest MAC address
    • C、the switch witch the higest IP address
    • D、the switch with the lowest IP address

    正确答案:A

  • 第21题：

    单选题
    A new Catalyst switch is connected to an existing switch using a crossover cable. As a result of this, what would the switch port link lights display?（）
    A

    The switch port link lights will be off on both switches indicating the ports are not connected.

    B

    The switch port link light will be off on one switch indicating that STP has disabled the port.

    C

    The switch port link lights will flash amber indicating an error.

    D

    The switch port link lights will be green indicating normal operation.


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）
    A

    the switch with the lowest MAC address

    B

    the switch with the higest MAC address

    C

    the switch witch the higest IP address

    D

    the switch with the lowest IP address


    正确答案： A
    解析： 暂无解析

  • 第23题：

    多选题
    What are two results of entering the Switch(config)# vtp mode client command on a Catalyst switch?（）
    A

    The switch will ignore VTP summary advertisements.

    B

    The switch will forward VTP summary advertisements.

    C

    The switch will process VTP summary advertisements.

    D

    The switch will originate VTP summary advertisements.

    E

    The switch will create, modify and delete VLANs for the entire VTP domain.


    正确答案： E,A
    解析： 暂无解析

  • 第24题：

    单选题
    In which of the following lists of APS Action Requests is the priority correctly arranged from lowest tohighest？（）
    A

    Wait-to-Restore，Forced Switch，Manual Switch，Lockout of Protection

    B

    Manual Switch，Wait-to-Restore，Lockout of Protection，Forced Switch

    C

    Lockout of Protection，Forced Switch， Manual Switch，Wait-to-Restore

    D

    Lockout of Protection，Manual Switch， Forced Switch，Wait-to-Restore

    E

    Wait-to-Restore，Manual Switch，Forced Switch，Lockout of Protection

    F

    Wait-to-Restore，Manual Switch，Lockout of Protection，Forced Switch


    正确答案： B
    解析： 暂无解析

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