During startup, the router displays the following error message: boot: cannot open "flash:" What will the router do next?（）A、Because of damaged flash memory， the router will fail the POSTB、It will attempt to locate the IOS from a TFTP server. If this fail

题目

During startup, the router displays the following error message: boot: cannot open "flash:" What will the router do next?（）

A、Because of damaged flash memory， the router will fail the POST
B、It will attempt to locate the IOS from a TFTP server. If this fails， it will initiate the setup dialog.
C、It will attempt to locate the IOS from a TFTP server. If this fails， it will load a limited IOS from ROM
D、It will attempt to locate the configuration file from a TFTP server. If this fails， it will initiate the setup dialog.
E、It will attempt to locate the configuration file from a TFTP server. If this fails， it will load a limited configuration from ROM

参考答案和解析

正确答案:C

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相似问题和答案

第1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

参考答案：A

第2题：

There are no boot system commands in a router configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?()

A. Flash,TFTP server,ROM

B. Flash,NVRAM,ROM

C. ROM,NVRAM,TFTP server

D. NVRAM,TFTP server,ROM

E. TFTP server,Flash,NVRAM

参考答案：A

第3题：

During startup, router VE1 displays the following error message:

boot: cannot open "flash:"

What will VE1 do next?

A. It will attempt to locate the configuration file from a TFTP server. If this fails, it will initiate the setup dialog.

B. It will attempt to locate the IOS from a TFTP server. If this fails, it will load a limited IOS from ROM.

C. It will attempt to locate the configuration file from a TFTP server. If this fails, it will load a limited configuration from ROM.

D. Because of damaged flash memory, the router will fail the POST.

E. It will attempt to locate the IOS from a TFTP server. If this fails, it will initiate the setup dialog.

F. None of the above

正确答案：B
B 解析：Explanation:
The boot sequence of a Cisco router is shown below:
Booting up the router and locating the Cisco IOS
1. POST (power on self test)
2. Bootstrap code executed
3. Check Configuration Register value (NVRAM) which can be modified using the config-register command

0 = ROM Monitor mode
1 = ROM IOS
2 - 15 = startup-config in NVRAM

4. Startup-config file: Check for boot system commands (NVRAM)
If boot system commands in startup-config
a. Run boot system commands in order they appear in startup-config to locate the IOS
b. [If boot system commands fail, use default fallback sequence to locate the IOS (Flash, TFTP, ROM)?]

If no boot system commands in startup-config use the default fallback sequence in locating the IOS:
a. Flash (sequential)
b. TFTP server (netboot)
c. ROM (partial IOS) or keep retrying TFTP depending upon router model

5. If IOS is loaded, but there is no startup-config file, the router will use the default fallback sequence for locating the IOS and then it will enter setup mode or the setup dialogue.

6. If no IOS can be loaded, the router will get the partial IOS version from ROM

第4题：

There are no boot system commands in arouter configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?()

A.Flash,TFTPserver,ROM

B.Flash,NVRAM,ROM

C.ROM,NVRAM,TFTP server

D.NVRAM,TFTP server,ROM

E.TFTP server,Flash,NVRAM

参考答案：A

第5题：

A cisco router is booting and has just completed the POST process.It is now ready to find and load an IOS image.what function does the router perform next?()

A.It checks the configuration register

B.It attempts to boot from a TFTP server

C.It loads the first image file in flash memory

D.It inspects the configuration file in NVRAM for boot instructions

参考答案：A

第6题：

When upgrading the IOS image, the network administrator receives the exhibited error message. What could be the cause of this error?()

A. The new IOS image is too large for the router flash memory.

B. The TFTP server is unreachable from the router.

C. The new IOS image is not correct for this router platform.

D. The IOS image on the TFTP server is corrupt.

E. There is not enough disk space on the TFTP server for the IOS image.

参考答案：B

第7题：

Refer to the exhibit. For what two reasons has the router loaded its IOS image from the location that is shown? ()

A.Router1 has specific boot system command that instruct it to load IOS from TFTP server.

B.Router1 is acting as a TFTP server for other routers.

C.Router1 cannot locate a valid IOS image in flash memory.

D.Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server.

E.Cisco routers will first attempt to load a image from TFTP for management purposes.

参考答案：A, C

第8题：

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, Flash

B．Flash, TFTP server, ROM

C．Flash, NVRAM, TFTP server

D．Flash, ROM, TFTP server

E．Flash, TFTP server, RAM

正确答案：B
解析：Explanation:BootinguptheRouter:CiscorouterscanbootCiscoIOSsoftwarefromtheselocations:1.Flashmemory2.TFTPserver3.ROM(notfullCiscoIOS)Multiplesourceoptionsprovideflexibilityandfallbackalternatives.

第9题：

A cisco router is booting and has just completed the POST process.It is now ready to find and load an IOSimage.what function does the router perform next?()

A.It checks the configuration register

B.It attempts to boot from a TFTP server

C.It loads the first image file in flash memory

D.It inspects the configuration file in NVRAM for boot instructions

参考答案：A

第10题：

During startup, the router displays the following error message: boot: cannot open "flash:" What will the router do next()。

A.Because of damaged flash memory, the router will fail the POST.

B.It will attempt to locate the IOS from a TFTP server. If this fails, it will initiate the setup dialog.

C.It will attempt to locate the IOS from a TFTP server. If this fails, it will load a limited IOS from ROM.

D.It will attempt to locate the configuration file from a TFTP server. If this fails, it will initiate the setup dialog.

E.It will attempt to locate the configuration file from a TFTP server. If this fails, it will load a limited configuration from ROM.

参考答案：C

During startup, the router displays the following error message: boot: cannot open "flash:" What will the router do next?（）A、Because of damaged flash memory， the router will fail the POSTB、It will attempt to locate the IOS from a TFTP server. If this fail

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