Đề thi chứng chỉ mạng quốc tế CCNA – Cisco IOS Questions - Đề 1

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Đề thi chứng chỉ mạng quốc tế CCNA – Cisco IOS Questions - Đề 1CCNA – Cisco IOS QuestionsHere you will find answers to Cisco IOS QuestionsNote: If you are not sure about the boot sequence of a router/switch, please readmy Cisco Router Boot Sequence Tutorial.Question 1How does using the service password encryption command on a router provide additionalsecurity?A. by encrypting all passwords passing through the routerB. by encrypting passwords in the plain text configuration fileC. by requiring entry of encrypted passwords for access to the deviceD. by configuring an MD5 encrypted key to be used by routing protocols to validaterouting exchangesE. by automatically suggesting encrypted passwords for use in configuring the routerAnswer: BExplanationBy using this command, all the (current and future) passwords are encrypted. Thiscommand is primarily useful for keeping unauthorized individuals from viewing yourpassword in your configuration file.Question 2Refer to the diagram. What is the largest configuration file that can be stored on thisrouter?R# show versionCisco IOS Software. 1841 Software (C1841-IPBASE-M}, Version 12.4(1a), RELEASESOFTWARE (fc2)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986*2005 by Cisco Systems, Inc.Compiled Fri 27-May-0512:32 by hqluongROM: System Bootstrap. Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)N-East uptime is 5 days, 49 minutesSystem returned to ROM by reload at 15:17:00 UTC Thu Jun 8 2006System image file is “flash:c1841-ipbase-mz.124-1a.bin”Cisco 1841 (revision 5.0) with 114688K/16384K bytes of memory.Processor board ID FTX0932W21Y2 FastEthernet interfaces2 Low-speed serial(sync/async) interfacesDRAM configuration is 64 bits wide with parity disabled.191K bytes of NVRAM.31360K bytes of ATA CompactFlash (Read/Write)Configuration register Is 0×2102R#A. 191K bytesB. 16384K bytesC. 31369K bytesD. 114688K bytesAnswer: AExplanationNon-volatile RAM (NVRAM) holds the router’s startup configuration file. NVRAMcontents are not lost when the router is powered down or reloaded.Question 3Which command shows system hardware and software version information?A. show configurationB. show environmentC. show inventoryD. show platformE. show versionAnswer: EQuestion 4Refer to the exhibit. If number 2 is selected from the setup script, what happens when theuser runs setup from a privileged prompt?[0] Go to the IOS command prompt without saving this config.[1] Return back to the setup without saving this config.[2] Save this configuration to nvram and exit.Enter your selection [2]:A. Setup is additive and any changes will be added to the config script.B. Setup effectively starts the configuration over as if the router was booted for the firsttime.C. Setup will not run if an enable secret password exists on the router.D. Setup will not run, because it is only viable when no configuration exists on the router.Answer: AQuestion 5Which command shows your active Telnet connections?A. show sessionsB. show cdp neighborsC. show usersD. show queueAnswer: AExplanationThe “show users” shows telnet/ssh connections to your router while “show sessions”shows telnet/ssh connections from your router (to other devices). The question asks about“your active Telnet connections”, meaning connections from your router so the answershould be A.Question 6Which command can you use to determine the cisco ios feature set on a cisco router?A. show versionB. dir flash:include iosC. show environmentD. show diagE. show inventoryAnswer: AQuestion 7A system administrator types the command to change the hostname of a router. Where onthe Cisco IFS is that change stored?A. NVRAMB. RAMC. FLASHD. ROME. PCMCIAAnswer: BExplanationThe change is only reflected in the running-config on RAM. It can be lost if we reset therouter without saving it.Note: Cisco IFS means “Cisco IOS File System”Question 8Before installing a new upgraded version of the IOS, what should be checked on therouter, and which command should be used to gather this information? (Choose two)A. the amount of available ROMB. the amount of available flash and RAM memoryC. the version of the bootstrap software present on the routerD. show versionE. show processesF. show running-configAnswer: B DExplanationWhen upgrading new version of the IOS we need to copy the IOS to the Flash so first wehave to check if the Flash has enough memory or not. Also running the new IOS mayrequire more RAM than the older one so we should check the available RAM too. Wecan check both with the “show version” command.Question 9Refer to the exhibit. A network administrator configures a new router and enters the copystartup-config running-config on the router. The network administrator powers down therouter and sets it up at a remote location. When the router starts, it enter the systemconfiguration dialog as s ...