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joshuamorgan
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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 5:41 pm

The problem with question 10 and the wording 'advertising routes' is people might then confuse that and say that network 222.12.0.0 0.0.255.255 area 0, for instance, would advertise 222.12.0.0/16. It won't however, it will simply enable interfaces that match that wildcard mask and advertise whatever network is connected to those interfaces. The command only works in an 'advertising route' manner in BGP - network 192.168.100.0 mask 255.255.255.0 *advertises* 192.168.100.0/24. That is, purely saying 'advertising routes' with respect to IGPs is misleading and not accurate...

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swagger
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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 6:48 pm

Agreed. But that's where your knowledge should take over. I mean, is it perfectly worded, no... But are these exams that we are taking perfectly worded?

joshuamorgan
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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 6:53 pm

Haha, they're never ideally worded.

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swagger
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Re: 4th set of CCNA sample questions published

Mon Sep 12, 2011 6:55 pm

Exactly :)

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mellowd
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Re: 4th set of CCNA sample questions published

Tue Sep 13, 2011 1:28 am

swagger wrote: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.


True, but either way you read it, it'll be wrong.

If you are asking the source address, it'll be the unicast address of the DR. If you are asking the destination address, it'll be 224.0.0.5 and not 224.0.0.6 - Also a DR is a designated router, not a domain router.

I would reword the question like so: "Which OSPF multicast address do designated routers send to, in order to send route updates to DROther routers in a multi-access segment?" - In this case the answer would be 224.0.0.5

Or ask it like this: "Which OSPF multicast destination address do OSPF routers send to, when sending an update to the designated router on a multi-access segment" - In this case the answer is 224.0.0.6

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mellowd
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Re: 4th set of CCNA sample questions published

Tue Sep 13, 2011 1:30 am

Also, even though Cisco exams are poorly worded, I don't think we should stoke that fire :) I would try and ask things correctly and remove the ambiguity

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swagger
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Re: 4th set of CCNA sample questions published

Tue Sep 13, 2011 6:29 am

The answer is right for the question.... 224.0.0.5. I understand what you are saying though :)

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Steve
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Re: 4th set of CCNA sample questions published

Fri Sep 23, 2011 2:04 pm

I'm working on getting these corrected. On question 14 I removed the old option 3 from the list, now options 2 and (the new) 4 are correct.

Any issues with that one?

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swagger
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Re: 4th set of CCNA sample questions published

Fri Sep 23, 2011 2:11 pm

Looks good to me :dance:

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Steve
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Re: 4th set of CCNA sample questions published

Fri Sep 23, 2011 2:22 pm

The wording on question 10 has been changed. You guys ok with that one now?

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Steve
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Re: 4th set of CCNA sample questions published

Fri Sep 23, 2011 2:31 pm

The wording on question 4 has been changed too. Let me know if any of these don't work or you see any other ambiguities or errors.

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mills
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Re: 4th set of CCNA sample questions published

Tue Sep 27, 2011 10:36 am

Cheers for the questions, a good selection.

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Halo
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Re: 4th set of CCNA sample questions published

Fri Sep 30, 2011 7:31 am

Question 4 still seems inaccurately worded.
It reads as "Which OSPF multicast destination address do domain routers use to send route updates to DROther routers in a multi-access segment?"
Mellowd's suggestion is more accurate:
"Which OSPF multicast address do designated routers send to, in order to send route updates to DROther routers in a multi-access segment?"
I would suggest the following:
"Which multicast address is used by the Designated Router when sending link-state update packets to other OSPF routers in the same area?"

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Steve
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Re: 4th set of CCNA sample questions published

Tue Oct 25, 2011 6:50 pm

Halo wrote:Question 4 still seems inaccurately worded.
It reads as "Which OSPF multicast destination address do domain routers use to send route updates to DROther routers in a multi-access segment?"
Mellowd's suggestion is more accurate:
"Which OSPF multicast address do designated routers send to, in order to send route updates to DROther routers in a multi-access segment?"
I would suggest the following:
"Which multicast address is used by the Designated Router when sending link-state update packets to other OSPF routers in the same area?"


I don't agree with this part:

Halo wrote:other OSPF routers in the same area?"


Aren't the multicast address only used on a segment?

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Don_quixote
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Re: 4th set of CCNA sample questions published

Tue Oct 25, 2011 11:20 pm

Great!!!
See it All

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mellowd
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Re: 4th set of CCNA sample questions published

Wed Oct 26, 2011 1:21 am

Steve wrote:
Halo wrote:other OSPF routers in the same area?"


Aren't the multicast address only used on a segment?


They are indeed. In a single area you can have loads of DR's and non DR's. All depends on how many OSPF speakers there are on a single layer2 segment.

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Project2501
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Re: 4th set of CCNA sample questions published

Wed Oct 26, 2011 10:32 am

This is awesome. NF is the first place/thing I recommend for those interesting or getting into networks.

Awesome stuff guys. :cheers:
- Pete

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Halo
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Re: 4th set of CCNA sample questions published

Mon Oct 31, 2011 4:42 am

Steve wrote:
Halo wrote:I would suggest the following:
"Which multicast address is used by the Designated Router when sending link-state update packets to other OSPF routers in the same area?"


I don't agree with this part:

Halo wrote:other OSPF routers in the same area?"


Aren't the multicast address only used on a segment?


Steve, you're right. I don't know what I was thinking when I wrote that, but looking at it I think I wanted to make the point that 224.0.0.5 isn't just there for use by the DR to send updates to DRothers. If you'll permit me to quote from RFC2328...

All routers running OSPF should be prepared to
receive packets sent to this address. Hello packets are
always sent to this destination. Also, certain OSPF
protocol packets are sent to this address during the
flooding procedure.

eugene
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Re: 4th set of CCNA sample questions published

Mon Oct 31, 2011 7:41 am

impressive questions/discussion.. thank u all guys

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