Share your CCNA Wireless Experience

@Conr43 top of the morning……I haven’t seen your doubts on Q101 let me look through see if I can find it

@Conr43 ok I looked up some material on it Cisco Press Chapter 11 Discovery of WLC…during the discovery phase it looks in order 1)local subnet 2)Local stored (Primary secondary…) 3)DHCP Option 43 4)DNS 5)reset and try again….remember this is in the discovery phase not the join phase

Now on to why A is the most logical choice lets look at the wrong answers first:

B)You don’t configure the DNS name with LWAPP its CAPWAP and the question portion of the config is correct

C)We know an AP doesn’t need to be layer 2 so thats wrong

D) DHCP option 43 is used from the AP to the DHCP server…. Option 15 doesn’t fit here

So from here all were left with is option A….now your brain might run a little like “well it should try to connect etc…” However focusing on the question with the data that we have its A…

@Anonymous…..good morning…..there is some good dialogue regarding this question I believe on page 14….however its always good to repeat and review stuff over and over right :-)….I had problems with this one too at first

So the key to this question is dealing with mW dBm dBd and dBi…..and the hang up for a lot of people including me was the dBd to dBi conversion…..
Gotta remember to deal with dBm and dBi you have to convert dBd to dBi and the formula is
dBi = dBd +2.15

So when you look at the question the 2.85 dBd converts to 5dBi so thats the first part

Next you have to look at converting mW to dBm… Thats 10s and 3s…theres some good material by Jerome Henry on that and its hard to explain but 20mW = 13dBm….because 10mW = 10dBm and you need to get to 20mW and you add 3dB to that to double it

We have 13dBm of the AP
We have 5 dBi gain of the antenna
We have 3dBi loss of the cable
Now add them all up

13 + 5-3 = 15dBm and thats Answer A

Thank you for your answer Manny. I read the link that you share with us:
http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/70333-lap-registration.html#topic3

and you can read there that:
” In this DNS name syntax, localdomain refers to the domain name that needs to be resolved. For example, if the domain is cisco.com, then this DNS name is CISCO-LWAPP-CONTROLLER.cisco.com. The AP needs to be informed about the domain name that needs to be resolved so that the AP can send the request to the DNS server that made the request to resolve this particular domain name. The AP is informed of this domain name through DHCP option 15. DHCP option 15 specifies the domain name that the AP should use for DNS resolution. Therefore, it is necessary that DHCP option 15 be configured with the domain name information. This allows the DHCP server that sends the IP address of the DNS server to also send this DHCP option 15 information (the domain name to be resolved) to the AP.”

So I was thinking that perhaps it could be answer D…

@Conr43 man good catch there :-) with option 15 I’m re-reading it now

@Conr43 ok I read the document again (kudos to my CCIEW buddy) and your response so the option 15 portion is dealing with the domain name…that is serviced through DHCP it helps the AP identify the domain name so it can be referenced next to CISCO-LWAPP-CONTROLLER.(local domain)….so yes that needs to be configured in the DHCP service..

BUT….and this is the key here….look at answer D closely

D. The controller must be configured for DHCP option 15 request.

It says the controller (DUN DUN DUN Sound)….were not dealing with the controller here were dealing with AP in the discovery phase….all its talking to is DHCP through option 43…and helping resolve the CISCO-LWAPP-CONTROLLER.localdomain to an IP address with DNS and DHCP option 15

I think LOL

@Conr43 I will tell you this and hope you feel the same man I feel smarter after this dialogue…if you go through the Cisco press there isn’t a mention of option 15 and I watched Jerome Henry’s CCNA-W videos and he does make reference to DHCP option 60 which has to deal with model numbers and providing WLC IPs but there wasn’t a reference to option 15…

Guys can we use any calculator for mW to dBm conversion during exam? If not then how we would make such mathematical calculations? I will be glad if someone please give me feedback on this. Thanks.

Yes, you’re right, DHCP Option 15 isn’t mentioned anywhere on Cisco press so it shouldn’t be answer D… I guess I’ll stick to answer A

@Conr43…so Ive heard in the past the Cisco Press is just one part of the material needed to pass these tests….so the writer/tech editor aren’t involved in the question/answer of creating the test….so I guess if you had a question where DHCP wasn’t providing option 15 out then I guess it would be a problem ya know…and again answer D is bringing in the controller into the mix and thats where I see a flag at ya know…

Just memorize one power value on mW and dBm and then apply the Law of 3s and Law of 10s.

Law of 3s—A value of 3 dB means that the power value of interest is double the reference
value; a value of –3 dB means the power value of interest is half the reference.

Law of 10s—A value of 10 dB means that the power value of interest is 10 times the reference
value; a value of –10 dB means the power value of interest is 1/10 of the reference.

Here’s an example:
Memorize 100mW -> 20dBm

400mW=100mW(your reference) x 2 x 2 -> 20dBm + 3 + 3 = 26dBm

20mW =100mW / 10 x 2 =20dBm -10 + 3 = 13dBm

Manny, you’re confusing me :) I was happy with answer A but now…

Passed, 977/1000.

1 drag and drop.
No sim or lab questions

Take the exam as fast as they can.

103q valid 100%.

Good luck!.

@Anonymous…..there are no calculators allowed in the test….just a whiteboard/piece of paper and a pen….as far a the calculations go there some stuff you can remember to help you out….the key is to remember adding 10dB adds 10 times power and adding 3dB doubles power same goes with minus and halving….my mentor taught me to work from 20dBm…

1dBm = 1mW
3dBm = 2mW
10dBm = 10mW
20dBm = 100mW

From that above you can work a lot of simple equations for example…20dBm -3dB equals 17dBm but since its a 3 you half power….so 17dBm = 50mW

Its a lot like subnetting you have to practice it and find a theme ya know….

However….for this test I don’t think there is a lot of power conversions based off a lot of the questions I’ve seen out here…..I wish I could help you more

@Anonymous…..Conr43 did a much better job of explaining than me :-) refer to that post….

@Conr43 sorry for the confusion….you are right stick with answer A its right LOL

Manny, you did an excellent job! :)

@anonymous…one last thing…being a wireless engineer its important that you do take the time to learn 10s and 3s its so important in our field to understand this….I use stuff like this on a weekly basis….
for example looking at the difference in power an 1131 vs a 3702…they have power levels 1-8 (depending on frequency / and UNII band) but the difference between power can be drastic and can really mess you up in the real world.

An 1131 on UNII-3 power level 1 is 17dBm and 3702 on the UNII-3 is 23 dBm….while that might not sound like much on dBm thats a game changer in power….17dBm is equal to 50mW and 23dBm is equal to 200mW….thats 4 times the amount of energy just by a difference in AP model which is crazy difference..

@Conr43 and @Manny

Thanks a lot and it’s great to hear from lovely people like you.

@Anonymous….no problem at all Conr43 and I have just been fielding questions we had back and forth so we welcome a new face…if you have any other questions small or big please reach out

@Anonymous also forgot to add SamSmith to that list of me Conr43 and I :-)

Thanks Manny!

RIC, was the drag and drop the one from the 103q dump?

I’m very curious to know how’s going to be this exam… I was expecting Dee to give us some feedback but that didn’t happen… I’m not very confident about the exam being from Q103 dump but we’ll see soon…

@Conr43 I understand your feelings regarding the 103q….I am trying to look at it this way…if this is not valid at least we are in the mindset of the way the test thinks….Im review videos from Jerome Henry and trying to look at key topics off the Cisco Press book through my days…Im also looking at stuff I quite don’t understand….for me my nervousness is with Prime…I use it a lot but I just use maps mostly…other stuff I fumble my way through it…

The problem is that there’s a lot of things to study and learn, it’s almost endless!

Yeah and its tough because its so general and specific at the same time…for example my job we are all centralized and thats all I know….we barely touch Meraki and we don’t do any converged

@ Conr43 and @Manny
Why are you not confident about 103 questions dump?
Couple of guys scored almost 100% using the same source even on June 23 in the exam. Guys I am really scared now. Would you have any other suggestions or should I go with this 103 questions dump that is provided in Google drive link? Please give me feedback. Thanks

You’ll have to wait until one of us takes the exam! :) I’ll go next week!

When are planning next week?

I’m planning to show up friday

@ conr43
When are you planning next week tentatively? Then I will schedule for myself. I am really excited about that. Thanks

@Conr43 and @Manny
Please keep me on your touch. I need your guidance. What about CWNA book compared to Cisco OCG? I am planning to read a book besides 103 questions. Thanks

@Conr43 me and you are on the same day….I’m going next Friday as well…

@Anonymous…..hey so I’m a believer of the CWNA track….theres a lot of really good information that can be learned from going that route….I took that one before studying for me CCNA-W…I am really happy that I did that too…

@anonymous….for me the only nervous point is where are all these people taking their tests at….Conr43 mentioned it should be the same test no matter what part of the world…what if its not…I don’t want to make you nervous though…..Either way I will stay in contact with this site so I will help if you ever need questions answered why something is the way it is….

@Manny

I appreciate indeed. I will be in touch with you guys. Good luck for your exam. I wish everything will be perfect for you, then I will be able to find stuffs easier through your concrete advice. Thanks a lot.

study the 103 and go take it…soon as it is accurate and you will pass

@Tester25…hows it going have you already taken it….what were your thoughts on the test?

Just Passed, 65 questions, passing score 860.
103Q is valid.

What about your score anonymous? Where 103 questions you read from ?

My score was 950, I have downloaded the questions file from the previous page.

Passed yesterday with 985/1000. All questions were from 103Q dump. Good Luck!

@Anonymous and @Eric
Guys did you have any simulation in the exam?

@Anonymous

No! No Sim, Only the questions from 103.
It seems to me that you are hesitating. Just be brave and take the exam NOW.

I think I should really change my name, to avoid confusion between you and me.

you can be anonymouse

So questions 85 and 86, which interface can be assigned IPv6, the first one says Management, then 86 asks for two, Management and service.

But in 85, service is an option, why is it not the answer?

Or is there something I’m missing here?

@SamSmith. I’m with you on 85 and 86. I was going to present that to you and @Conr43. I’m assuming the difference with the name service and service-port. I’ve gone through a couple of times and I feel like I see it both ways on the Cisco Press.

Yeah it is confusing. Typical cisco

Passed 200-355 exam yesterday with a score of 965/1000!

65 questions in total, no Labs or Simlets, got one Drag&Drop.

Learned all questions from PassLeader 200-355 dumps (http://www.passleader.com/200-355.html), all questions were 100% same.

P.S. New 200-355 dumps are available here: http://www.mctsbible.com/?s=200-355