CCNA – Cisco IOS Questions
Here you will find answers to Cisco IOS Questions
Note: If you are not sure about the boot sequence of a router/switch, please read my Cisco Router Boot Sequence Tutorial.
Question 1
How does using the service password encryption command on a router provide additional security?
A. by encrypting all passwords passing through the router
B. by encrypting passwords in the plain text configuration file
C. by requiring entry of encrypted passwords for access to the device
D. by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
E. by automatically suggesting encrypted passwords for use in configuring the router
Answer: B
Explanation
By using this command, all the (current and future) passwords are encrypted. This command is primarily useful for keeping unauthorized individuals from viewing your password in your configuration file.
Question 2
Refer to the diagram. What is the largest configuration file that can be stored on this router?
|
R# show version ROM: System Bootstrap. Version 12.3(8r)T8, RELEASE SOFTWARE (fc1) N-East uptime is 5 days, 49 minutes Cisco 1841 (revision 5.0) with 114688K/16384K bytes of memory. Configuration register Is 0×2102 R# |
A. 191K bytes
B. 16384K bytes
C. 31369K bytes
D. 114688K bytes
Answer: A
Explanation
Non-volatile RAM (NVRAM) holds the router’s startup configuration file. NVRAM contents are not lost when the router is powered down or reloaded.
Question 3
Which command shows system hardware and software version information?
A. show configuration
B. show environment
C. show inventory
D. show platform
E. show version
Answer: E
Question 4
Refer to the exhibit. If number 2 is selected from the setup script, what happens when the user runs setup from a privileged prompt?
|
[0] Go to the IOS command prompt without saving this config. 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 first time.
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: A
Question 5
Which command shows your active Telnet connections?
A. show sessions
B. show cdp neighbors
C. show users
D. show queue
Answer: A
Explanation
The “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 answer should be A.
Question 6
Which command can you use to determine the cisco ios feature set on a cisco router?
A. show version
B. dir flash:include ios
C. show environment
D. show diag
E. show inventory
Answer: A
Question 7
A system administrator types the command to change the hostname of a router. Where on the Cisco IFS is that change stored?
A. NVRAM
B. RAM
C. FLASH
D. ROM
E. PCMCIA
Answer: B
Explanation
The change is only reflected in the running-config on RAM. It can be lost if we reset the router without saving it.
Note: Cisco IFS means “Cisco IOS File System”
Question 8
Before installing a new upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information? (Choose two)
A. the amount of available ROM
B. the amount of available flash and RAM memory
C. the version of the bootstrap software present on the router
D. show version
E. show processes
F. show running-config
Answer: B D
Explanation
When upgrading new version of the IOS we need to copy the IOS to the Flash so first we have to check if the Flash has enough memory or not. Also running the new IOS may require more RAM than the older one so we should check the available RAM too. We can check both with the “show version” command.
Question 9
Refer to the exhibit. A network administrator configures a new router and enters the copy startup-config running-config on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enter the system configuration dialog as shown. What is the cause of the problem?
|
— System Configuration Dialog — Would you like to terminate autoinstall? [yes]: Press RETURN to get started! |
A. The network administrator failed to save the configuration.
B. The configuration register is set to 0×2100.
C. The boot system flash command is missing from the configuration.
D. The configuration register is set to 0×2102.
E. The router is configured with the boot system startup command.
Answer: A
Explanation
The “System Configuration Dialog” appears only when no startup configuration file is found. The network administrator has made a mistake because the command “copy startup-config running-config” will copy the startup config (which is empty) over the running config (which is configured by the administrator). So everything configured was deleted.
Note: We can tell the router to ignore the start-up configuration on the next reload by setting the register to 0×2142. This will make the “System Configuration Dialog” appear at the next reload.
Question 10
Refer to the exhibit. What can be determined about the router from the console output?
|
1 FastEthernet/IEEE 802.3 interface(s) ———-System Configuration Dialog ———- Would you like to enter the initial configuration dialog? [yes/no]: |
A. No configuration file was found in NVRAM.
B. No configuration file was found in flash.
C. No configuration file was found in the PCMCIA card.
D. Configuration file is normal and will load in 15 seconds.
Answer: A
Explanation
When no startup configuration file is found in NVRAM, the System Configuration Dialog will appear to ask if we want to enter the initial configuration dialog or not.
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@9tut @Xallax
Re Q5, these are quotation from Todd Lammies CCNA V7 cert guide
“To see the connections made from your router to a remote device, use the show sessions command”
and..
“You can list all active consoles and VTY ports in use on your router with the show users command”
Question 5 states “Active VTY connection” and from the above quotations the sh users command is correct.
Can you please again clarify why the “sh sessions” is correct in respect to the question asked?
@alantheaussie
you’re asked for telnet connections, not open vty ports (lines). just semantics
Today wrote exam…I got Q1,4 and 5questions
@9tut @Xallax
why not show users?
Router#show users
Line User Host(s) Idle Location
* 0 con 0 idle 00:00:00
67 vty 0 idle 00:00:04 192.168.33.3
Interface User Mode Idle Peer Address
Router#show session
% No connections open
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@sly: The “show users” displays information about all terminal lines (console, vty…) while the “show sessions” only displays information about vty (telnet) lines.
Note: The “show sessions” shows how many Telnet connections you are making to other devices (outbound connection), not the Telnet connections to your router.
Therefore “Which command shows your active Telnet connections” should be understood as “Which command shows how many Telnet connections to other devices (from your router)”
@9tut: thank you for your explain. Last doubt. But if the question is “show session” and not “show sessions” it’s correct? idem for show “mac-address” or “show mac-address-table”? I would like understand if in cisco exams it’s valid short notation command.
@sly: Cisco seldom uses short commands in their answer. Maybe the “show mac-address” is just an exception so I believe if the answer is “show session”, it is still correct.
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Hey guys, i want to confirm from anyone of your here regarding the questions in Collisio;
Which command shows your active Telnet connections?
A. show sessions
B. show cdp neighbors
C. show users
D. show queue
Ans: A
Which command shows you active Telnet connections?
A. show sessions
B. show cdp neighbors
C. show users
D. show queue
Ans: C
If anyone of you have noticed the difference between the two questions, only the word “yours” and “you”. Anyone who can explain especially for those who are from US, Canada, UK or Australia…
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I also had problem with the “show users” and “show session” cmds, but i think it getting clearer
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I’m just a bit confused though regarding Q#2.
I’ve read a book saying that you can also store config file on flash memory.
Please help me to clarify my understanding on this concept.
Thanks in advance!
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@Confused!
Which command shows your active Telnet connections?
A. show sessions
B. show cdp neighbors
C. show users
D. show queue
Ans: A
Comment: Your active Telnet connections are connections initiated by you to other devices.
Which command shows you active Telnet connections?
A. show sessions
B. show cdp neighbors
C. show users
D. show queue
Ans: C
Comment: These are Telent connections people/users are connected to your device.Active Telnet connections to your device
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@Confused!
Use “disconnect” command to kill your sessions.
USe “clear” command to kill other user’s sessions.
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Can someone give an explanation of Q4. I don’t know if I’m reading it incorrectly, looking at it I’m seeing D as the correct answer, because this is what I do every day at work and this question seems wrong to me. Am I reading it incorrectly?
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