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vlan GB0 Exam Isolate user vlan Answer SwitchA SwitchB
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H3C Huawei-3Com Certified internet Expert:Routing and Switching
 
O rder : GB0-800 Exam
Practice Exam: GB0-800
Exam Number/Code: GB0-800
Exam Name: Huawei-3Com Certified internet Expert:Routing and Switching
Questions and Answers: 866 Q&As 
Free GB0-800 Braindumps
  
  
Exam : HuaWei GB0-800
Title : Huawei-3Com Certified internet Expert:Routing and Switching
1. 以太网帧（数据链路层）最后4byte为数据链路层CRC校验值，当一个数据帧尾没有形成一个完整的Byte时被称为：
（ ） 
A. 普通CRC校验错误 
B. Runt错误 
C. Oversize错误 
D. Fragment (碎片) 
E. alignment错误 
F. Jabber
Answer: E
2. 关于Isolate-user-vlan和Super VLAN，下列描述中哪项是不正确的（ ） 
A. 建立Isolate-user-vlan的主要目的是减少上行交换机需要配置的VLAN数 
B. Isolate-user-vlan的主VLAN可以包含具体的物理端口，但Super VLAN的主VLAN不能包含具体物理端口 
C. 建立Super VLAN的主要目的是避免IP地址的浪费 
D. 默认情况下，Isolate-user-vlan不同Secondary VLAN下的主机是不能互通的，但Super VLAN不同 Sub VLAN下的主
机是可以互通的 
Answer: D
3. 在OSI七层模型中，两台主机之间进行通信时，其中一台主机的会话层通常只和对端的（ ）进行通信。 
A. 物理层 
B. 网络层 
C. 传输层 
D. 表示层 
E. 会话层 
F. 数据链路层 
Answer: E
4. 关于VLAN VPN产生的背景原因描述正确的有（ ） 
A. 客户希望将处在不同地点的办公网络通过公网互连，如同两个网络直接相连 
B. 运营商希望在为客户提 
供服务的同时，尽可能的降低自己对客户网络的维护量 
    
 
  
 
  
   
 
  
 
      
 
  
 
     
 

  
 
     
 
  
    
       
  
C. 客户希望实现服务质量保证 
D.在实际应用中，尤其是在城域网中，需要大量的VLAN来隔离用户，而IEEE802.1Q中VLAN Tag域定义的4K个VLAN
远远不能满足需求 
Answer: ABD
5. 在LACP中，形成一个链路聚合组ID所必须的元素包括：（ ） 
A. Actor系统ID 
B. Actor操作KEY 
C. Actor系统优先级 
D. Partner系统ID 
E. Partner操作KEY 
F. Partner系统优先级 
Answer: BDE
6. 下列关于多链路帧中继说法错误的有（ ） 
A. 多链路帧中继（Multilink Frame Relay，简写为MFR）基于帧中继论坛的FRF.16协议 
B.多链路帧中继特性提供一种逻辑接口：MFR接口，由多个帧中继物理链路捆绑而成，从而可以在帧中继网络上提供高
速率、大带宽的链路 
C. 对同一个MFR接口必须捆绑速率一致的物理接口，否则将无法绑定成功 
D. 一个MFR接口对应一个捆绑，一个捆绑中可以包含多个捆绑链路，一个捆绑链路对应着一个物理接口或者子接口 
Answer: CD
7. 在下面的组网中，SwitchA为二层交换机，SwitchB为三层交换机。要求PC1、PC2和PC3之间禁止互访，但是都可以
通过SwitchB上的网关，进行三层访问；SwitchB可以管理SwitchA。 
根据上面的需求，下面配置中的正确的是（ ） 
A. [SwitchA]vlan 100
[SwitchA-vlan100]Isolate-user-VLAN enable
[SwitchA]isolate-user-vlan 100 secondary 10 20 30
[SwitchA]interface GigabitEthernet 1/1
[SwitchA-GigabitEthernet1/1] port link-type trunk
[SwitchA-GigabitEthernet1/1] port trunk permit vlan 10 20 30 100
[SwitchB]vlan 1000
[SwitchB-vlan1000]port GigabitEthernet 1/1
[SwitchB]interface Vlan-interface 1000
[SwitchB-Vlan-interface1000]ip address 10.1.1.254 255.255.255.0
B. [SwitchA]vlan 100
[SwitchA-vlan100]Isolate-user-VLAN enable
[SwitchA]isolate-user-vlan 100 secondary 10 20 30
[SwitchA]interface GigabitEthernet 1/1
[SwitchA-GigabitEthernet1/1] port link-type trunk
[SwitchA-GigabitEthernet1/1] port trunk permit vlan 10 20 30 100
[SwitchB]vlan 1000
[SwitchB]interface Vlan-interface 1000
[SwitchB-Vlan-interface1000]ip address 10.1.1.254 255.255.255.0
[SwitchB]interface GigabitEthernet 1/1
[SwitchB-GigabitEthernet1/1] port link-type trunk
[SwitchB-GigabitEthernet1/1] port trunk permit vlan all
C. [SwitchA]vlan 100
[SwitchA-vlan100]port GigabitEthernet 2/1
[SwitchA-vlan100]Isolate-user-VLAN enable
[SwitchA]isolate-user-vlan 100 secondary 10 20 30
[SwitchB]vlan 1000
[SwitchB-vlan1000]port GigabitEthernet 1/1
[SwitchB]interface Vlan-interface 1000
[SwitchB-Vlan-interface1000]ip address 10.1.1.254 255.255.255.0
 
 
  

 
  
 
  
  
D. [SwitchA]vlan 100
[SwitchA-vlan100]port GigabitEthernet 2/1
[SwitchA-vlan100]Isolate-user-VLAN enable
[SwitchA]isolate-user-vlan 100 secondary 10 20 30
[SwitchA]interface Vlan-interface 100
[SwitchA-Vlan-interface100]ip address 10.1.1.253 255.255.255.0
[SwitchB]vlan 1000
[SwitchB-vlan1000]port GigabitEthernet 1/1
[SwitchB]interface Vlan-interface 1000
[SwitchB-Vlan-interface1000]ip address 10.1.1.254 255.255.255.0
Answer: D
8. 下面关于HVPLS接入方式的说法，正确的是（ ） 
A. UPE与NPE之间运行LDP会话时，可以根据LDP会话的活动状态来判断主PW是否失效来设计MTU/UPE与PE/NPE设
备之间链路的备份 
B. 对于QinQ接入的HVPLS，没有办法判断主、从PW的状态，所以QINQ方式的接入无法实现MTU/UPE与PE/NPE设备
之间链路的备份 
C. HVPLS可以减少UPE路由器之间的全连接 
D. HVPLS可以大大减少网络中被复制的广播报文数目 
E. HVPLS接入方式转发到VPN对端的数据包中的私网标签由UPE分配的 
Answer: AC
9. STP发送配置消息的目的地址是（ ） 
A. 01-80-C1-00-00-00
B. 01-80-C2-00-00-00
C. 01-80-C3-00-00-00
D. 01-80-C4-00-00-00
Answer: B
10. 在标签转发过程中，MPLS报文头中的TTL减一，IP报文头中的TTL同时也会减一。 
T. True
F. False
Answer: F
11. 在只应用单生成树实例的网络中，网络直径最好不超过（ ） 
A. 7
B. 8
C. 9
D. 10
Answer: A
12. 扩展后的IS-IS协议使用________传递TE相关属性信息：（ ） 
A. Type 21 TLVs
B. Type 22 TLVs
C. Type 23 TLVs
D. Type 24 TLVs
Answer: B
13. 在L2TP组网中，假设LAC与LNS都已在公共网上，并实现正确连通的情况下，如果Tunnel建立失败，那么可能的原
因有（ ） 
A. 在LAC端，LNS的地址设置不正确 
B. LAC端设置的用户名与密码有误 
C. Tunnel验证不通过 
D. LNS（通常为路由器）端没有设置可以接收该隧道对端的L2TP组 
Answer: ACD
 
 
   
   
  
 
 

 
 
  
    
  
  
 
  
 
14. 下列关于HOPE的说法正确的是（ ） 
A. HOPE解决了作为下层PE的BGP连接数量大的问题 
B. HOPE解决了作为下层PE的VPN路由数量大的问题 
C. SPE可以同时作为UPE 
D. HOPE支持嵌套 
Answer: ABCD
15. 快速以太网技术中包含了众多成员，下列关于这些成员的描述正确的有（ ） 
A. 100Base-TX采用五类双绞线传输数据，最大距离可以达到100米 
B. 100Base-T4采用三类双绞线传输数据，但是传输距离小于100米 
C. 100Base-T4与100Base-TX不同的是，100Base-T4需要4对双绞线进行数据传输，而100Base-TX只需要2对 
D. 100Base-T2同100Base-TX一样也只需要2对双绞线传输数据，但它采用了不同于其它快速以太网的编码方式 
E. 100Base-F采用的是光纤传输介质，目前传输距离可以达到100千米 
Answer: ACDE
16. 以太网报头中的以太网帧类型字段为0 x 8035时，表示后面数据的类型可能为：（ ） 
A. ARP请求 
B. ARP应答 
C. RARP请求 
D. RARP应答 
Answer: CD
17. 分层PE跨域部署时，假如骨干网划为一个自治系统，城域网划为另外一个自治系统，那么下列说法正确的是：
（ ） 
A. 骨干网设置SPE，城域网设置UPE 
B. UPE将城域网全部路由发送给SPE，SPE只发送VRF默认路由给UPE 
C. 城域网只维护内部的VPN SITE和远端相同VPN的所有路由，骨干网维护全局所有VPN SITE的路由 
D. 在跨AS方案中，SPE-UPE采用MP-EBGP或者Multi-hopEBGP方式，实现灵活的部署 
Answer: ABD
18. 下列关于协议VLAN的描述中正确的有（ ） 
A. 协议VLAN的划分依据是数据帧中的协议字段以及数据帧的封装格式 
B. 协议VLAN也是802.1Q标准描述的内容之一 
C. 协议VLAN允许端口发送和接收多个VLAN数据帧，且对端可能无法识别Tag帧，因此运行协议VLAN的端口只能是
Hybrid端口 
D. 协议VLAN尽管允许发送和接收多个VLAN 数据帧，但仍然可以只收发一个VLAN的数据帧，因此运行协议VLAN的端
口也可以是Access端口 
Answer: AC
19. FTP的常用端口号为： （ ） 
A. 20，21 
B. 21，22 
C. 20，22 
D. 21，23 
Answer: A
20. 关于冲突域和广播域，下列说法正确的有：（ ） 
A. Hub的所有端口都属于同一个冲突域 
B. 以太网交换机的一个VLAN是一个广播域 
C. 以太网交换机上的端口都分别属于不同的冲突域 
D. 以太网交换机的上VLAN实际上是一个冲突域 
Answer: ABC
 
  

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