思科认证 题目列表
以下哪一项不是有关虚电路交换方式的正确描述。() A.分组需要包含虚电路标识符B.某条虚电路对应的转发项只给出该虚电路经过的两个端口之间的关联C.虚电路标识符用于建立终端间传输路径与终端间传输的数据之间的绑定D.虚电路是指终端间传输路径
Ezonexam has a Class C network and you need ten subnets. You wish to have as many addresses available for hosts as possible. Which one of the following subnet masks should you use?A．255.255.255.192B．255.255.255.224C．255.255.255.240D．255.255.255.248E．None of the above
Which of the following are true of Ethernet technology?A．Hosts use a logical ring topology.B．Hosts use a logical bus topologyC．Hosts must wait for an electronic signal to transfer data.D．Hosts are directly connected to a wiring concentrator called a MSAU.E．None of the above
Which one of the following characteristics is true regarding the use of hubs and switches?A．Hubs can have their ports be configured with VLANsB．Using hubs is costly with regard to bandwidth availability.C．Switches can not forward broadcasts.D．Switches are more efficient than hubs in processing frames.E．Switches increase the number of collision domains in the network.
During the boot sequence, a Ezonexam 2800 series router needs to locate and load an operating system. What is the default order the router uses to find an operating system?A．ROM, TFTP server, FlashB．Flash, TFTP server, ROMC．Flash, NVRAM, TFTP serverD．Flash, ROM, TFTP serverE．Flash, TFTP server, RAM
The network security policy for Ezonexam requires that only one host be permitted to attach dynamically to each switch interface. If that policy is violated, the interface should be automatically disabled. Which two commands must the Ezonexam network administrator configure on the 2950 Catalyst switch to meet this policy? (Choose two)A．SWEzonexam1(config-if)# switchport port-security maximum 1B．SWEzonexam1(config)# mac-address-table secureC．SWEzonexam1(config)# access-list 10 permit ip hostD．SWEzonexam1(config-if)# switchport port-security violation shutdownE．SWEzonexam1(config-if)# ip access-group 10
The Ezonexam network administrator needs to a switch named VE1 to become the root bridge for a redundant path switched network. What can be done to ensure that VE1 will always assume the role as the root bridge?A．Assign the switch a higher MAC address than the other switches in the network haveB．Establish a direct link from the switch to all other switches in the networkC．Configure the switch full-duplex operation and configure the other switches for half-duplex operationD．Configure the switch so that it has lower priority than other switches in the networkE．None of the above
要启用LACP并将交换机端口加入端口信道1,可使用下面哪两个命令之一?() A.Switch(config)#interface port-channel1B.Switch(config)#channel-group 1 mode activeC.Switch#interface port-channel 1D.Switch(config-if)#channel-group 1 mode active
下面哪三种有关RSTP的说法是正确的?() A.第2层网络拓扑发生变化时，需要重新计算生成树，而RSTP提高了这种计算的速度B.RSTP是一种IEEE标准，重新定义了STP端口角色、端口状态和BPDUC.RSTP极具前瞻性且反应迅速，因此绝对需要802.1d的延迟定时器D.RSTP( 802.1w)优于802.1d，但依然是专用的E.RSTP修改了所有802.1d术语和大部分参数F.为支持传统交换机，可在每个端口上进行配置，让802.1w退化为802.1d
下面是你在一台交换机上执行命令show spanning－tree时得到的输出:请问下面哪两种有关这台交换机的说法是正确的?() A.这台交换机是根网桥B.这台交换机不是根网桥C.根网桥与这台交换机之间有4台交换机D.这台交换机运行的是802.1wE.这台交换机运行的是STP PVST+
802.1d定义了哪些端口状态?() A.阻断B.丢弃C.侦听D.学习E.转发F.替代