CCNA - slayed the dragon!!!!!!

Author

slayed the dragon!!!!!!

cciewannabe

2002-06-13, 1:08 pm

the last time i failed 847 out of 848. today i got 885! wew hew! i was actually surprised i only got 885, i seemed to know every answer, must have gotten tricked on one or two. and on one perticular question i was pretty certain that CISCO had goofed. it was a subnetting question, and i can do subnetting backwards forwards and everything in between. the question asked was what is the broadcast for 200.19.16.0/27? i don't get it, do the math, the first 3 bits in the 4th octet are subnet and .0 can NOT be a host address, could be a subnet if you had ip subnet-zero (not-stated) but the broadcast for that subnet with the 255.255.255.224 subnet would be .31 and that WASN"T AN OPTION. tell me what im doing wrong??!

anyhow, im so glad im done with this one, the sims were easy, one on setting vty, con, and enable secret password, and one setting RIP on router C and having it advertise it's ethernet connnected LAN to A and B. I thought i would have been more nervous than the last time. The last time i had shaking hands and all, but i was as cool as fonzi. im not religious but prayed the night before, i asked only that he help with the nervousness, and funny thing is it worked. thats the only test ive ever been calm on. i mean i was so calm i probably could have juggled bananas while doing the test. anyhow.. my thanks to everyone who helped me, thanks to waynesworld for his advice in my other post, and all the rest too.
CHEERS!
time to PARTaY~!!!!

allbombguy

2002-06-13, 1:58 pm

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i asked only that he help with the nervousness, and funny thing is it worked. thats the only test ive ever been calm on.
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Amen

What were the other answers to the subnetting question?

JayDot

2002-06-14, 8:55 am

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i asked only that he help with the nervousness, and funny thing is it worked. thats the only test ive ever been calm on.
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Ask & Ye Shall Recieve~
Seek and Ye Shall Find

What ever Ye ask in My Name(Jesus)shall be Give Unto You So that The Father May be Glorfied threw the SON(Jesus)

GONGRADULATIONS~

To Answer Your Question~
I think the BroadCast Address Would Be
200.19.16.30*BroadCast
Nodes address would be 200.19.16.(1-29)
200.19.16.0 *Network/Subnet

200.19.16.31*Next Subnet Network Address
Node Adress 32-60
200.19.16.61*Broadcast Address

But I'm Not SURE CUZ I havent Taken test YET STill Studying Myself....

gdavison

2002-06-14, 9:32 am

At best the question seems to be ambiguous.

200.19.16.0 is the first sub net as as such is not normally used. Its broacast address would be 200.19.16.31

The Last subnet for the network would be 200.19.16.224 This would be the broadcast network for all the subnets.

200.19.16.255 would be the overall broadcast address for the standard class C

What were the answer options?

cciewannabe

2002-06-14, 9:47 am

i spent almost 10 minutes on this question. did the math a hundred ways from sunday and am pretty darn sure it's gotta be cisco mistake, heaven forbid. it was a one liner question with no details, what is the broadcast of 192.168.16.0/27? that's it. and my interpretation is .31 if you have the ip subnet-zero. all of the other subnetting questions were a cake walk for me. their were 5 choices, i have trouble remembering the exact numbers, but remember a .187 a .62 and know for a fact that there was no .31 or .224 or anything that would be close. after pulling my hair out i did an iny-miny-miny mo thing. i think they goofed the question or answer. when i finished i mentioned it to the proctor and she said that they couldnt look into it and that id have to contact cisco. it was question 20, and im not sure they'd listen. im sure they get plenty of people who say their questions are wrong. but i know that was the question given and .31 wasn't there. makes me wonder how many other quetsions they may have goofed on and you're automatically penalized without knowing it. and given they won't tell you which you missed or why there's little chance of them getting corrected. ill stand by my claim all day long. 27 were the bits and it was a 0 at the end, asking for the broadcast address.

cciewannabe

2002-06-14, 9:49 am

oh yeah, also .255 wasn't an option either, i was thinking that could have been the ambiguity too, but no .255

zzn169

2002-06-18, 11:48 pm

it was a subnetting question, and i can do subnetting backwards forwards and everything in between. the question asked was what is the broadcast for 200.19.16.0/27? i don't get it, do the math, the first 3 bits in the 4th octet are subnet and .0 can NOT be a host address, could be a subnet if you had ip subnet-zero (not-stated) but the broadcast for that subnet with the 255.255.255.224 subnet would be .31 and that WASN"T AN OPTION. tell me what im doing wrong??!

For the CCNA, subnet zero is not used, therefore with the 200.19.16.0/27 the first subnet would be 200.19.16.32/27 and the broadcast for it would be 200.19.16.63. Then of course x.x.x.64 being the next subnet.

Thats my guess anyway.

cciewannabe

2002-06-21, 8:25 am

zzn,
i was thinking the same thing, but .63 wasn't an option. .62 was though, but it specifically asked for broadcast and .62 wouldnt be a broadcast under no circumstances, ever, no matter what the question. and even if .63 was in there, it's still a dumb question. .0 is not an ip adress of any kind and there was no mention of ip subnet-zero being used. i seriously think its a goof on cisco's behalf. when answering a question i always assume first that im doing something wrong, but knowing subnetting as well as i do and doing the math 3 different ways, subtract from 256, count the bits, etc. i know the questions was incomplete for the answer. slight oversight on cisco's behalf and it cost me a question and a lot of frustration. i wrote down the complete question with answers to report it to the proctor, but she said they could do nothing and that i couldn't take it with me. i should have just folded it up and taken it, and then reported it to cisco.

ciscowannabe

2002-06-21, 9:04 am

Well, I understand one person was called by a Cisco Rep informing him that he had actually scored higher than what he had first thought. Let us know if you're contacted by Cisco in the future informing you that you're scored was actually higher than what your test results had stated.

Also, is there a way that a person can protest a question he feels that was very ambiguous? We pay Cisco/MS alot of money for these exams, they can at least provide us with some type of recourse when we see a potential problem with one of their exams.

Thanx Guys!

-=SL4|NE=-

2002-06-21, 10:50 am

200.19.16.0/27

Class C address
27 bit-mask
24 would be default
27 makes it subnetted
3 - bits added for subnetwork id's
5 - bits left for hots id's

2^3-2 = 6 subnetworks
2^5-2 = 30 hots/ network

1st network is
200.19.16.0 <----net id
200.19.16.1 <----1st host
200.19.16.30 <----last host
200.19.16.31 <----broadcast

2st Subnet id is
200.19.16.32 <----net id
200.19.16.33 <----1st host
200.19.16.62 <----last host
200.19.16.53 <----broadcasr

3rd subnet and so on up till 6 subnetworks.

I beleive this is correct

The correct answer would fall into the 1st network where we would find our given IP address 200.19.16.0 it is the net ID the netowrk. Broadcast for that network is 200.19.16.31 based on the SM.

Correct me if I'm wrong

-Slaine-

cciewannabe

2002-06-24, 9:10 pm

subnet-zero was not specified, but yes given that the question asked "what is the broadcast for blah.blah.blah.0/27 would be .31 but that WAS NOT AN OPTION!
IF SOMEONE ELSE RUNS INTO THIS QUETION PLEASE TELL ME, we should protest
For some reason i remember the number of the question is 20
I spent almost 10 minutes on this question, clearing my eyes, reading one letter at a time, thinking it had to be me, but its messed, cisco screwed up!

nyriavo

2002-06-24, 11:26 pm

Doesn't the ip subnet-zero command apply ONLY when you want to use, in a class C network address, a subnet mask 255.255.255.128 ??
If so, it wouldn't have made any difference in the question because you had 255.255.255.224, right?

Correct me if I'm wrong

Thank you

-=SL4|NE=-

2002-06-26, 10:12 am

No nyriavo "ip subnet-zero" is used anytime you want to subnet a network and the subnetwork happens to be the same address as the network address. You use the "ip subnet-zero" command and then you can bind the new subnetted ip address (which would be the same as the network address) to an interface. All versions from IOS 12.0 on have this command enabled by default if you want to restrict the use of subnet zero you need to enter "no ip subnet-zero".

ex. 140.140.0.0 <---ID
255.255.255.0 <---Mask

network ID is 140.140.0.0
subnetwork ID would also be 140.140.0.0

so thats a class B address, you would use the ip subnet-zero" there also.

If there were no choices like .31 or .63 then they screwed up. I was going to take the test soon, but I hear so many things that are wrong with the test that I might just wait a little bit longer until they get all the kinks out of it and by then I should know CCNA inside out.

-=SL4|NE=-

nyriavo

2002-06-26, 10:41 am

Thank you -=SL4|NE=- for your response but now I'm a little bit more confused than before.
Now, about what you said, the question is
what would be the necessity of having a subnet wich would be the same network address. Why don't you just use the DEFAULT SUBNET MASK for that class of network address instead.

In your example you say:

ex. 140.140.0.0 <---ID
255.255.255.0 <---Mask

But, as far as I know, using this mask you would be masking the first 8 bit of the host part of this network address class b, wich will give you 254 subnets and 254 host id's.

if you just want to have 1 subnet with the network address 140.140.0.0, shouldn't you use the default mask 255.255.0.0 ???

Am I that wrong???

Thanks!!!

-=SL4|NE=-

2002-06-26, 11:59 am

Sorry for the confusion, if we only want 1 network (no subnets) yes we would use the default mask and that would be no problem.

When talking about subnet-zero, we are subnetting. This is where the problem can occur.

140.140.0.0
255.255.255.0

now we created 254 subnets for each of our sites with 254 hosts/site.

140.140.1.0 <-subnet 1
140.140.2.0 <-subnet 2 and so on

we still have 140.140.0.0 - 140.140.0.255 as a subnet range, subnet zero. I believe we would use the command ip subnet-zero to allow us to use these IP address' with the mask given.

this would allow us to use the subnet 0 range, wich can then be bound to the interface of choice.

I hope this is correct, I'm still new at this stuff, sorry to confuse you, I hope this is true. Any other outside input would help.

-=Slaine=-

freak

2002-06-26, 12:38 pm

congrats to you! The CCNA is a fun test, isn't it?

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