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Steve
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4th set of CCNA sample questions published

Fri Sep 09, 2011 3:27 pm

sample_questions_ccna_4.php

Let me know if you see any errors.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 3:37 pm

Nice questions Steve... 3 months ago I wouldnt have gotten some of those answeres. Question 14 though... Wouldnt the cost of the interface by default be 1 since it's FastEthernet. So ip ospf cost 10 could be an answer as well right?

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Steve
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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 3:40 pm

All of these questions were provided by forum users. This batch came from scottsee and dlots. Credit to them.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 3:41 pm

Awesome! I'll be posting this on my blog's how-to.
http://3rdlayer.wordpress.com/
See most people talk about the OSI model as having 7 layers but they don't mention layer 8 where a lot of the problems actually occur.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 6:06 pm

What about my comment on question #14?

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Steve
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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 6:47 pm

swagger wrote:What about my comment on question #14?


I don't know. You tell me.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 7:03 pm

LOL. You took and passed ROUTE already. Default cost of FastEthernet interfaces is 1 so if everything is default in that output of that question, then 'ip ospf cost 10' had to be configured' or the reference-bandwidth was changed.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 7:19 pm

Nice questions! Thanks guys!
I don't have a signature.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 8:32 pm

swagger wrote:LOL. You took and passed ROUTE already. Default cost of FastEthernet interfaces is 1 so if everything is default in that output of that question, then 'ip ospf cost 10' had to be configured' or the reference-bandwidth was changed.


Everything in that output is not default, however.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 8:34 pm

Right, so 'ip ospf cost 10' has to be a valid answer, correct?

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 10:25 pm

ip ospf cost 10 could be a valid answer, unless auto-cost reference-bandwidth was configured under the OSPF process...

There are, however, two other things listed in the command output that aren't default settings. Take a look at the interfaces on R1 and compare the router-id that R1 is using. Think also about DR/BDR elections.

Because those two settings have options listed as answers, and auto-cost reference-bandwidth could have been used to manipulate the cost and change it to 10 (with the interface having no ip ospf cost explicitly configured), ip ospf cost 10 is not the correct answer in this situation.

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Re: 4th set of CCNA sample questions published

Fri Sep 09, 2011 10:55 pm

Question 10:
network 222.12.12.1 255.255.255.192 area 0
due to the magic of awesome IOS routing this command would also work I think (it would magicly convert it)
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Re: 4th set of CCNA sample questions published

Sat Sep 10, 2011 1:38 pm

Joshua,

I see your point. Leaving a lot to be thought about though. But yes, I answered the question correctly, the cost just caught my eye.

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Re: 4th set of CCNA sample questions published

Sat Sep 10, 2011 2:20 pm

I wish I could tell you guys what I was thinking/doing when I created those. It was just to long ago..

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Re: 4th set of CCNA sample questions published

Sat Sep 10, 2011 2:45 pm

Q4 - 224.0.0.5 is the multicast address for all OSPF routers; to wit, where all the hellos are directed

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Re: 4th set of CCNA sample questions published

Sat Sep 10, 2011 4:56 pm

Swagger: I think you'll agree it's a very Cisco/Pearson VUE-esque question haha :-)

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Re: 4th set of CCNA sample questions published

Sat Sep 10, 2011 6:02 pm

:) True. Which worries me for Friday. Hopefully I'll find the MOST correct answer :)

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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 3:42 pm

Ok, so what's the consensus here?

On 14, the correct answers are 2, 3, and 5.
On 10, both 1 and 4 are correct.
And on 4, the correct answer is 4.

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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 4:19 pm

Steve wrote:Ok, so what's the consensus here?

On 14, the correct answers are 2, 3, and 5.
On 10, both 1 and 4 are correct.
And on 4, the correct answer is 4.


On 14, you can't guarantee that 3 is correct, as there could be an auto-cost value under the ospf process

I don't like the wording of #10 at all. The network statement never advertises routes. I would rather ask, on which interfaces in the /16 would ospf actually run on or something similar. This is more of a subnetting question than an ospf question.

#4 is incorrect. DR's use their own unicast address as a source address to send updates to drothers. The destination address of this update is 224.0.0.5. Only updates sent TO the DR will have 224.0.0.6 as the destination address.

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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 4:55 pm

@Darren,

I agree with you and Joshua... It's not guaranteed that 'ip ospf cost 10' was used so I would say just 2 and 5 is correct on question #14.

For question 10, while I understand your thinking, that command will enable OSPF on the interface AND advertise the network that is configured on that interface. So in a sense, it does advertise the network. The wording could be better.

I fail to see what you are referring to on question #4... It seems pretty straightforward to me.

Which OSPF multicast address do domain routers use to send route updates to DROther routers in a multi-access segment?

It's asking what is the destination address, but I could see how someone would think it meant the source address. For CCNA, I don't think they get that deep so they should have 224.0.0.5 - All OSPF routers and 224.0.0.6 - DR/BDRs pounded in their heads.

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