31. Refer to the exhibit. Look at the command output. Assume that there is no other path, and the configuration is correct. What would be the consequences of this situation?
布线的问题
D. configuration problem
如图所示，看到这个命令的输出。假设没有其他的路径配置也没有任何的问题，那么这种情 况的后果是什么?
A. Users in SW1 can ping SW2 but not vice versa.
B. Users in SW2 can ping SW1 but not vice versa.
C. Users in SW1 and SW2 can ping each other.
D. Users in SW1 and SW2 cannot ping each other. Answer: D
32. Refer to the exhibit. Look at the command output. What can you use to prevent this behavior?
如图所示，看到这个命令的输出。怎么能阻止这种行为?
A. UDLD (UniDirectional Link Detection 单向链路检测) B. spanning-tree loopguard C. VTP mode transparent D. switchport mode desirable Answer: A
33. Refer to the exhibit. The Layer 2 network uses VTP to manage its VLAN database. A network designer created all VLANs on the VTP server (switch 1) and it has been advertised through VTP to all other VTP clients (switches 2 through 4). Due to network growth, a network operator decided to add a new switch between switch 1 and switch 3. The network operator has been instructed to use a refurbished switch and use a VTP client. Which three of these
factors should the network operator consider to minimize the impact of adding a new switch? (Choose three.)
如图所示，一个二层网络使用VTP来管理VLAN数据库，一个网络设计师在VTP服务器(交 换机1)上创建所有VLAN，并且用VTP将所有的VLAN传递给所有的VTP客户机(交换机 2,3,4) 。由于网络的扩建，公司决定在交换机1和交换机3之间增加一台交换机。公司使用了 一台翻新的交换机。以下哪三个因素可以减少增加交换机所造成的影响。
A. Pay special attention to the VTP revision number, because the higher value takes the priority.
要注意VTP的修订号，因为修订号高的优先级高
B. Configure all VLANs manually on the new switch in order to avoid connectivity issues.
C. A trunk should be established between the new switch and switches 1 and 3 as VTP only runs over trunk links.
在新交换机和交换机1和3之间运行Trunk
D. Set at least the VTP domain name and password to get the new switch synchronized.
需要设置VTP的域名和密码，以便获得更新
E. An ISL trunk should be established between the new switch and switches 1 and 3, because VTP only runs over ISL. F. Pay special attention to the VTP revision number, because the lower value takes the priority. Answer: ACD
34. Refer to exhibits 1 and 2. In exhibit 1, all users on the LAN segment use router A as the active HSRP router. Router B is the standby router for the HSRP. In exhibit 2, the network management team reported that there is no utilization on the WAN link B. To solve this problem, you decide to change the logical topology of your LAN, but you are not sure about what changes must be made. You must manage HSRP or change it to another protocol in order to provide the most scalable design, automatic redundancy, and load balancing. Which one of these actions would be the best choice?
如图所示，在1组 所有用户是在使用网络中开启了HSRP路由器A和主用路由路由器B是备 用路由器。在2组 网络小组报告网络用户没有使用b的WAN口。要解决这个问题，你决心改 变网络逻辑拓扑，但是你不确定必须这样做。你必须使用HSRP或者使用其他协议来实现挽 网络可扩展性，自动冗余，自动负载。下面哪一个是最好的选择?
A. Use MHSRP, with three users using router A as the default gateway and three users using router B as the default gateway.
B. Keep HSRP and activate PBR to redirect half of the traffic to the other WAN link.
C. Use the backup interface on the WAN link B to provide load balancing for all users.
D. Use GLBP instead, because it provides you with up to three MAC addresses for the same default gateway virtual IP address.
E. Use GLBP instead, because it provides you with up to four MAC addresses for the same default gateway virtual IP address.
使用GLBP，因为他可以提供4个MAC地址相同的默认网关的虚拟地址
Answer: E
35. Refer to the exhibit. Users from the Engineering VLAN complain that every time Business VLAN users have a network connectivity issue, the Engineering VLAN users usually have problems experiencing slow response or network connectivity problems. After troubleshooting, an unauthorized switch 2 was found. This unauthorized switch has been a regular problem, assuming the root bridge function under the spanning-tree domain and causing the Engineering VLAN to be unstable. Which three of these actions could be suggested to fix the problem?
如图所示，工程VLAN用户总是抱怨每次连接上商务VLAN用户时有问题。工程VLAN的用 户经常遇到网络缓慢和网络连接问题。排除故障后，发现一个没有授权的交换机2。这个没 有授权的交换机有规律的出问题， 假设这个交换机在STP中作为工程VLan的根桥， 并造成工 程VLAN的不稳定，下面哪三个问题可以解决这个问题?
A. Upgrade Spanning Tree Protocol to Rapid Spanning Tree Protocol.
升级成快速生成树协议(RSTP)
B. Change Business VLAN PCs to switch 1 and switch 4.
C. Force the root bridge to be switch 2, instead.
D. Adjust spanning-tree timers (max-age and forward-delay).
E. Shut down all unused ports.
关闭没有使用的端口
F. Use MSTP to separate the Engineering VLAN from the Business VLAN to optimize spanning-tree convergence time within each VLAN
使用MSTP 分割工程VLAN和商业VLAN 以优化每个生成树的收敛时间
Answer: AEF
