What is the purpose of the Spanning Tree Protocol (STP)?

【名词&注释】

路由器(router)、一对一(one to one)、是什么(what is)、源地址转换

[单选题]What is the purpose of the Spanning Tree Protocol (STP)?

A. To prevent routing loops
B. To create a default route
C. To provide multiple gateways for hosts
D. To maintain a loop-free Layer 2 network topology
E. To enhance the functions of SNMP

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学习资料：

[单选题]Cisco IOS命令ip nat inside source static 10.1.1.5 172.35.16.5的作用是什么()

A. 为所有的外部NAT创建一个全局的地址池
B. 为内部的静态地址创建动态的地址池
C. 它为所有内部本地PAT创建创建了动态源地址转换
D. 为内部本地地址和内部全局地址创建一对一的映射关系

[单选题]基本IP访问权限表的表号范围是：()

A. 1—100
B. 1-99
C. 100-199
D. 800-899

[单选题]查看E0端口配置信息的命令是：()

A. show access-list
B. show ip route
C. show version
D. show interfacee0

[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）

A. show access-list
B. show interface e0
C. show ipinterface e0
D. show e0

[单选题]路由器上，设置端口速率的命令是（）

A. clock rate
B. bandwidth
C. set
D. encap

[单选题]You are a senior network administrator at Ezonexam, and while performing the password recovery procedure on your 2500 series Cisco router, you type in the following command:o/r 0x2142

A. What is the purpose of this command?
B. It is used to restart the router.
C. It is used to bypass the configuration in NVRAM.
D. It is used to enter ROM Monitor mode.
E. It is used to view the lost password.
F. It is used to save the changes to the configuration.

[多选题]How could the Ezonexam corporation benefit from using VLANs on their network?(Select three answer choices.)

A. VLANs allow access to network services based on department, not physical location.
B. VLANs utilize packet filtering to enhance network security.
C. VLANs provide a low-latency, high bandwidth internetworking alternative.
D. VLANs provide a method of communication between IP addresses in large networks.
E. VLANs establish segmented broadcast domains in switched networks.
F. F. VLANs can greatly simplify adding, moving, or changing hosts on the network.

[单选题]On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?

A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet.
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.
E. None of the above

[多选题]The Ezonexam network administrator needs to determine what LAN devices to install on the Ezonexam network. What are two advantages of using Layer 2 Ethernet switches over hubs? (Choose two)

A. Allowing simultaneous frame. transmissions
B. Increasing the size of broadcast domains
C. Increasing the maximum length of UTP cabling between devices
D. Filtering frames based on MAC addresses
E. Decreasing the number of collision domains

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