You need to upgrade the IOS of an exis...

单项选择题You need to upgrade the IOS of an existing router on your network. The new IOS image is located on a TFTP server that you have set up within the network. What command should you issue in order to download the new IOS version?（）

A. Router# copy tftp flash
B. Router# copy flash run
C. Router(config)# restore flash
D. Router(config)# repair flash
E. Router#copy flash tftp
F. Router# copy start flash

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1.单项选择题 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.

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2.多项选择题Which of the following commands will display the name of the IOS image file being used in a Cisco router?（）

A. Router# show IOS
B. Router# show version
C. Router# show image
D. Router# show protocols
E. Router# show flash

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3.单项选择题You are a senior network administrator at TestKing, and while performing thepassword recovery procedure on your 2500 series Cisco router, you type in thefollowing command:o/r 0x2142What is the purpose of this command?（）

A. It is used to restart the router.
B. It is used to bypass the configuration in NVRAM.
C. It is used to enter ROM Monitor mode.
D. It is used to view the lost password.
E. It is used to save the changes to the configuration.

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4.多项选择题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

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5.单项选择题 After working all night and successfully configuring a Cisco router for the TestKing network you save your changes on the startup config, reboot the router, and go out for a cigarette. When you return, none of your changes are active and the router boots to the initial configuration mode!
Which of the choices below indicates the source of your problem?（）

A. Hardware failure in NVRAM prevents the router from loading the config
B. Startup-config in flash is corrupt and cannot be analyzed
C. Router configuration-register set to bypass startup configuration
D. Startup-config in NVRAM is corrupt and cannot be analyzed
E. None of the above

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6.单项选择题You have just purchased a brand new router and wish to have the router prompt you through the initial configuration commands. Which router mode does this describe?（）

A. ROM Monitor mode
B. SETUP mode
C. Autoflash mode
D. RXBOOT mode
E. None of the above

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7.单项选择题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

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8.单项选择题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 line
B. It will move the cursor one line up
C. It will redisplay the current command line
D. It will capitalize the command line
E. None of the above

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9.单项选择题You just purchased a refurbished router that contains a configuration from a previous deployment. What should you do, before entering a new configuration into the router?（）

A. RAM should be erased and the router restarted.
B. Flash should be erased and the router restarted.
C. NVRAM should be erased and the router restarted.
D. The new configuration should be entered and saved.

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10.单项选择题In the Cisco IOS, what is the definition of a global command?（）

A. A command that can be entered in any configuration mode.
B. A command that supports all protocols.
C. A command that is implemented in all IOS versions.
D. A command that is set once and affects the entire router.
E. A command that is available in every release of IOS.

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