After logging into a router and typing in a few show commands, you press the up arrow key. What will this do?（）A、It will recall the previous command lineB、It will move the cursor one line upC、It will redisplay the current command lineD、It will capitalize

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While working in setup mode, a configuration line is typed incorrectly. What should you do to exit setup mode, without executing or saving any of the mistakes you made?（）

• A、Type exit at the setup dialog.
• B、Type close at the setup dialog.
• C、Press the Ctrl-C key combination.
• D、Press the Ctrl-X key combination.
• E、Issue the copy startup-config command.
• F、Issue the 'write e" command.
• G、Issue the "write mem" command

第5题：

After making changes to the router, you issue the "copy running-config startup-config" command to save changes. After reloading the router, the router comes up in setup mode. You again make changes, save them, and reboot. Again,the router comes up in setup mode. What is the most likely cause of this?（）

• A、The NVRAM is corrupted.
• B、The boot system commands were omitted in the configuration.
• C、The configuration register setting is incorrect.
• D、The upgraded configuration incompatible with the hardware platform.
• E、The upgraded IOS incompatible with the hardware.

第6题：

After logging into a router, you type in "enable" and then enter the correct password when prompted. What is the current router prompt symbol at this point?（）

• A、>
• B、#
• C、?
• D、*
• E、All of the above
• F、None of the above

第7题：

An employee of ABC company has move to an office on a different floor. Although the administrator is able to telnet to all of the routers,the address of Switch F is needed in order to verify that the employee remains in the same VLAN.Which action could be used by the administrator to find the IP address of Switch F?（）

• A、Issue the show ip route command on Router A
• B、Issue the show ip route command on Router B
• C、Issue the show cdp neighbors command on Router B
• D、Issue the show cdp neighbors detail command on Router C
• E、Issue the show arp command on Router A
• F、Issue the show arp command on Router B

第8题：

You wish to upgrade the IOS of a router without removing the image currently installed.What command will display the amount of memory that is being used by the current IOS image and whether there is enough room available to hold both the current and new images?（）

• A、Router# show version
• B、Router# show flash
• C、Router# show memory
• D、Router# show buffers
• E、Router# show running-config
• F、All of the above

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第15题：

You are helping the customer customer configure anthentication，a new asyncOS upgradebecomes available，what should you do？（） 

• A、avoid mentioning the upgrade to the customer
• B、schedule a convenient time to upgrade again， backing up the configuration before and after theupgrade
• C、contact customer support and ask them to run the upgrade for you
• D、immediately show the customer how to run the CLI command upgrade

第16题：

A Catalyst switch has just been installed and configured, and is not working as expected. You have decided to capture multiple show command outputs to study. Which one command could you use that includes the output of many other show commands, such as show version and show running-config?（）

• A、show configuration
• B、show memory
• C、show stacks
• D、show tech-support

第17题：

While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface to be?（）

• A、Serial 0 is up, line protocol is up
• B、Serial 0 is up, line protocol is down
• C、Serial 0 is down, line protocol is down
• D、Serial 0 is down, line protocol is up
• E、Serial 0 is administratively down, line protocol is down
• F、Serial 0 is administratively down, line protocol is up

第18题：

You want to log in to the router and make a configuration change. After logging in as the root user, what is the next command you must enter?（）

• A、enable
• B、configure
• C、edit
• D、cli

第19题：

After working on a router, some problems arise and you wish to view the commands that you recently entered. Which IOS command opens the history buffer and displays the most recently entered commands?（）

• A、Show history
• B、Show buffers
• C、Show typed commands
• D、Show terminal buffer
• E、Show command

第20题：

After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"（）

• A、Layer 1 on the interface is up but Layer 2 is down.
• B、Layer 2 on the interface is up but Layer 3 has not been configured.
• C、The interface is administratively up but the link status is down.
• D、The interface is up but has been administratively turned off.

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