ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 41
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The startup configuration file is in NVRAM; theother file, which is in RAM, is the one that the router uses during operation. When therouter first comes up, the router copies the stored configuration file from NVRAM intoRAM, so the running and startup configuration files are identical at that point. Also,exterior to the router, configuration files can be stored as ASCII text files anywhere usingTFTP or FTP.The boot process follows this basic litany:1.
The router performs a power-on self-test (POST) to discover and verify the hardware.2. The router loads and runs bootstrap code from ROM.3. The router finds the IOS or other software and loads it.4. The router finds the configuration file and loads it into running config.Two configuration tools tell the router what OS to load:1. The configuration register2. The boot system configuration commandFirst, the configuration register tells the router whether to use a full-featuredIOS,ROMMON, or the limited-feature IOS, which also is called RXBOOT mode. Theconfiguration register is a 16-bit software register in the router, and its value is set usingthe config-register global configuration command.
(Some older routers had a hardwareconfiguration register with jumpers on the processor card, to set bits to a value of 0 or 1.)On most Cisco routers, the default Configuration Register setting is hexadecimal 2102.0x2102 : Default, which loads the IOS from Flash Memory0x2100 : Boot the router in ROM Monitor Mode0x2142: Boot the router bypassing the startup configurationQUESTION 352:Actualtests.com - The Power of Knowing640-802There are no boot system commands in the router configuration in NVRAM forrouter CK1 . What is the fallback sequence that the router CK1 will use to find anIOS during reload?A.
ROM, NVRAM, TFTP serverB. Flash, TFTP server, ROMC. TFTP server, Flash, NVRAMD. Flash, NVRAM, ROME. NVRAM, TFTP server, ROMF. None of the aboveAnswer: BQUESTION 353:During startup, router CK1 displays the following error message:boot: cannot open "flash:"What will CK1 do next?A. It will attempt to locate the configuration file from a TFTP server. If this fails, it willinitiate the setup dialog.B. It will attempt to locate the IOS from a TFTP server. If this fails, it will load a limitedIOS from ROM.C.
It will attempt to locate the configuration file from a TFTP server. If this fails, it willload 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 thesetup dialog.F. None of the aboveAnswer: BExplanation:The boot sequence of a Cisco router is shown below:Booting up the router and locating the Cisco IOS1. POST (power on self test)2. Bootstrap code executed3. Check Configuration Register value (NVRAM) which can be modified using theconfig-register command0 = ROM Monitor mode1 = ROM IOS2 - 15 = startup-config in NVRAM4. Startup-config file: Check for boot system commands (NVRAM)If boot system commands in startup-configActualtests.com - The Power of Knowing640-802a.
Run boot system commands in order they appear in startup-config to locate the IOSb. [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 inlocating the IOS:a. Flash (sequential)b. TFTP server (netboot)c. ROM (partial IOS) or keep retrying TFTP depending upon router model5. If IOS is loaded, but there is no startup-config file, the router will use the defaultfallback sequence for locating the IOS and then it will enter setup mode or the setupdialogue.6. If no IOS can be loaded, the router will get the partial IOS version from ROMReference: http://www.svrops.com/svrops/documents/ciscoboot.htmQUESTION 354:After logging into a router and typing in a few show commands, you press the uparrow 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 the command lineE. None of the aboveAnswer: AExplanation:The up arrow key is used to recall the previous command line entry. The commands thatwere entered previously can be displayed by repeatedly pressing the up arrow key, or byentering the "show history" command.QUESTION 355:After working on a router, some problems arise and you wish to view the commandsthat you recently entered. Which IOS command opens the history buffer anddisplays the most recently entered commands?A.
Show historyB. Show buffersC. Show typed commandsD. Show terminal bufferE. Show commandF. None of the aboveActualtests.com - The Power of Knowing640-802Answer: AExplanation:The router will buffer previously entered commands. By default, the "show history"command will display the previous ten commands that were entered. To see the contentsof the buffer you enter the show history command.Incorrect Answers:B. This command will show the memory buffer informationC, D.
These are invalid commands.QUESTION 356:You have just purchased a brand new router and wish to have the router promptyou through the initial configuration commands. Which router mode does thisdescribe?A. ROM Monitor modeB. SETUP modeC. Autoflash modeD. RXBOOT modeE. None of the aboveAnswer: BExplanation:Setup mode is a convenient mode that walks you through the setup procedure byprompting you with specific questions and options one by one.QUESTION 357:After working all night and successfully configuring a Cisco router for the Certkillernetwork you save your changes on the startup config, reboot the router, and go outfor a cigarette.
When you return, none of your changes are active and the routerboots to the initial configuration mode! Which of the choices below indicates thesource of your problem?A. Hardware failure in NVRAM prevents the router from loading the configB. Startup-config in flash is corrupt and cannot be analyzedC. Router configuration-register set to bypass startup configurationD. Startup-config in NVRAM is corrupt and cannot be analyzedE. None of the aboveAnswer: CActualtests.com - The Power of Knowing640-802Explanation:The default configuration-register setting of 0x2102 loads the IOS from flash and theconfiguration from NVRAM.However, for password recovery, you can set the register to 0x2142 and thestartup-config file in NVRAM will be bypassed.
The problem described here is that theconfig register was not changed back to 0x2102 before the router was rebooted, so theactive configuration is bypassed. Simply setting the config register back to 0x2102 willfix this problem.Incorrect Answers:A, B, D. All of these describe hardware or software errors. In the event that this is theproblem, errors will be generated and the router will fail to boot properly. In these cases,the router will not return to the initial startup configuration.QUESTION 358:While working in setup mode, a configuration line is typed incorrectly.
What shouldyou do to exit setup mode, without executing or saving any of the mistakes youmade?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" commandAnswer: CExplanation:Here is the partial output from new router while it boots up:At any point you may enter a question mark '?' for help.Refer to the 'Getting Started' Guide for additional help.Use ctrl-c to abort configuration dialog at any prompt.Incorrect Answers:A. The Exit command can not be used during setup mode.B.
This is an invalid commandE. This command is used to save the configuration stored on NVRAM to a location.F. This will have the effect of erasing the running configuration, and setting the routerconfiguration back to the factory default settings.G. This is an old command that is still supported on the latest Cisco IOS. It is short for"write memory" and has the same effect as the "copy running-config startup-config"command.Actualtests.com - The Power of Knowing640-802QUESTION 359:You are a senior network administrator at Certkiller , 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.Answer: BExplanation:Theo/r 0x2142 command changes the value of config-register to 2142 in a Cisco 2500series router, so that the Router ignores the NVRAM contents and reverts to the initialsetup configuration mode when it boots.QUESTION 360:Refer to the exhibit below.
A Certkiller technician wants to upload a new IOS in therouter while keeping the existing IOS. What is the maximum size of an IOS file thatcould be loaded if the original IOS is also kept in flash?Exhibit:A. 4 MBB. 5 MBC. 8 MBD. 3 MBE.
7 MBF. None of the aboveActualtests.com - The Power of Knowing640-802Answer: AExplanation:Based on the output provided, the total amount of flash memory available is 8388608bytes (8 MB), but the existing IOS is using up 3803056 bytes (3 MB), so in order to fitboth IOS files into the flash the new image must be no greater than the amount ofavailable memory, which is 4585552 bytes (4 MB).QUESTION 361:Refer to the diagram. What is the largest configuration file that can be stored onthis router?Exhibit:A. 31369K bytesB.
16384K bytesC. 191K bytesD. 114688K bytesE. None of the aboveAnswer: CActualtests.com - The Power of Knowing640-802Explanation:Non-Volatile Random Access Memory (NVRAM) is used as the storage location for therouter's startup configuration file. After the router loads its IOS image, the settings foundin the startup configuration are applied. When changes are made to a router's runningconfiguration, they should always be saved to the startup configuration (stored inNVRAM) or they will be lost when the router shuts down.
Remember that the runningconfiguration is stored in RAM, which is erased when the router is powered down. On aCisco 2500 series router, NVRAM is a relatively tiny 32KB in size. In this example, thefile size is only 191K, so the config file must not exceed this.QUESTION 362:Why might the Certkiller network administrator set the configuration register to0x2142 on a 2600 series Cisco router?A. To boot the IOS from ROMB. To reset the console passwordC. To upload a new version of the configuration fileD.
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