Share your CCNA Wireless Experience

@Tintin
Would you like to share your dispensations with me so I can prepare myself for the exam?
I thank you in advance.

I also email you my e-mail address where you can send material for the exam: {email not allowed}
Thanks again.

fabiominervini8 @ gmaildotcom

When using multiple SSIDs on a lightweight AP, how does the traffic of each SSID reach the 802.3 network?
A. provide routing between them at the core so that the SSIDs can reach the internet
B. configure 802.11q trunking on the Ethernet switch port that is connected to the AP
C. configure ACLs at the switch port that will allow all desired SSIDs to pass traffic
D. configure the SSIDs on the WLC and it will regulate the trafficbased on traffic type

The dump says B but it is LAP so the right answer seems to be D
@Tintin did you see that one in your exam?

What three components are required to configure Mobility Group Members between Wireless LAN Controllers?
(Choose three.)
A. Controller Management IP Address
B. Controller Virtual IP Address
C. Controller Multicast IP Address
D. Controller MAC Address
E. Controller Mobility Group Name
F. Controller AP Management IP Address
G. Controller RF Group Name
Dumps say ADE but it should be ABE what do you think?

@guardian ADE is correct.
http://www.cisco.com/c/dam/en/us/td/i/200001-300000/210001-220000/210001-211000/210936.tif/_jcr_content/renditions/210936.jpg

@Fabio

You are right, it would be impossible to pass this exam solely relying on any dumps (411, 437, 441, 103 or whatever) without understanding the concepts. The reason being the wording of the questions and the options as well, what I got in my exam, was really twisted, without having the knowledge of the topic one can not answer.
It was only a few questions probably around 15 or less in my exam that was directly from the 411/437 dump without any change in wording or options, the rest was quite different.
Knowing the RF principles, understanding the 802.11 protocols, the channels and frequencies will help you to secure at least 5 to 7 questions. Knowing the management methods of WLC, lightweight and autonomous APs (console, ssh, telnet, HTTP, HTTPS etc, what is used in what situation) will help you with at least 4-5 questions. Understanding the different AP modes (what can be done from what mode, like, local, flexconnect, sniffer etc) will secure another 2-3 questions.
So be comfortable with the concepts in CCNA Wireless syllabus, does not matter if you are reading the books, or watching videos. Dumps can be an add on item to your preparation, not the foundation.

@Guardian
Post#2, I got this question and I chose D.

@Crimson
No Anyconnect questions, but a around 2-3 from RRM. Knowing the very basic of what RRM does will be more than enough.

@Guardian
I passed my CWNA exam in 2015, that’s why I already had that book and I preferred reading it again to brush up my knowledge on Wifi fundamentals instead of reading a new book altogether.
If you have already learned all the WiFi basics from somewhere else, that is absolutely fine and I dont think you need to read CWNA book. Unfortunately I only have a hard copy of it, not in pdf that I could share with you.

You can search in google for CWNA (PW0-106 edition) official cert. guide, and you are likely to find it and have a look.

Thanks Tintin for the feedback and for the tips. I am about to sit soon and hopefully I can make too.

@Tintin:
What about the apple MAC and iphone questions? Did you encounter some of them?

Regarding #10; seems there is as per previous page… is there any other apple question aside from the one below?

How to configure in iphone a hidden SSID?
answer: settings>wifi>other>enter ssid name & security

A wireless engineer has an access point using the 5.725-GHz channel in the United States. In which band is
the AP operating?
A. UNII-1
B. UNII-2
C. UNII-2 Extended
D. UNII-3
C or D?

since the last 20MHz wide channel in UNII-2 Evtended band has center frequency of 5.720GHz

for #12:
That confused me as well guardian, because UNII-3 has a frequency range of 5.725-5.850 GHz.
Or you mean, the explanation is the one in #13?

@crimson the last of UNII-2 Extended 5.720 and the first of UNII-3 5.745
Each has 20MHz wide. So 5.725 is the first frequency of UNII-3. So the answer should be D in my opinion

What is the effect of increasing antenna gain on a radio?
A. focusing energy in a defined direction
B. adding energy creating a larger cell
C. aligning phase shifting
D. improving frequency specific diversity

It should be A but the dumps says B, anybody can explain?

#16 It is A for sure

@guardian
Antenna’s can’t create energy, they can only focus the available energy. It is A.

Now, I’ve seen a question where it asks something like what is the effect of increasing the transmitter power on a radio. In that case, the answer would be B.

@guardian/crimson

#12
According to this graphic from Cisco, it looks like it should be UNII-3.

http://www.cisco.com/c/dam/en/us/products/collateral/wireless/aironet-1300-series/prod_white_paper0900aecd801c4a88.doc/_jcr_content/renditions/0900aecd805340e5_null_null_null_11_19_04-1.jpg

Thanks guardian and foxx for #12

And I agree with Foxx for #16, that makes sense

What is the big difference between “virtual interface” and “management interface” that can easily stick to my mind? The confusing part for me is they are both used for mobility.

#10
@Crimson: I got that one.

@Tintin: cool… thanks. already +1 if I got that too :-)

Just want to assure that my understanding for the below question is correct:

A WLAN deployment uses a combination of Cisco Aironet 1260 APs and multiple Cisco 5500 Wireless LAN Controllers to provide wireless LAN access to end- users. The network administrator has decided to use DHCP Option 43 to enable the APs to discover the wireless LAN controllers. When configuring the DHCP scope, which format should be used for the Cisco WLC addresses?

A. a comma-separated ASCII string of Cisco WLC AP-manager addresses
B. a comma-separated ASCII string of Cisco WLC management addresses
C. a comma-separated ASCII string of Cisco WLC virtual IP addresses
D. a hexadecimal string of Cisco WLC AP-manager addresses
E. a hexadecimal string of Cisco WLC management addresses
F. a hexadecimal string of Cisco WLC virtual IP addresses
Correct Answer: E

So my understanding is, management address is the correct answer because it is looking for the DHCP address and management interface is the one used for relaying the DHCP address information? It just gives me confusion with “AP-manager addresses”.

@crimson
I think management interface is used for DHCP, virtual interface is used for DHCP relaying. Any comment?

http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43-00.html

When DHCP servers are programmed to offer WLAN Controller IP addresses as Option 43 for Cisco 1000 Series APs the sub-option TLV block is defined in this way:
– Type – 0x66 (decimal 102).
– Length: – A count of the characters of the ASCII string in the Value field. Length must include the commas if there is more than one controller specified, but not a zero-terminator.
– Value: – A non-zero terminated ASCII string that is a comma-separated list of controllers. No spaces should be embedded in the list.

When DHCP servers are programmed to offer WLAN Controller IP addresses as Option 43 for other Cisco Aironet LAPs, the sub-option TLV block is defined in this way:
– Type – 0xf1 (decimal 241).
– Length – Number of controller IP addresses * 4.
– Value – List of the WLC management interfaces, typically translated to hexadecimal values.

Based on the question is about 1260 I would say the answer would be B.

Any comment on this question?
A Cisco Aironet 1260 AP is unable to join a Cisco 2500 Series WLC that is connected through a Layer 2 switch.
Which three options help to verify the wireless network operation and locate a possible issue? (Choose three.)
A. Verify status of GUI Wireless > Country
B. Verify status of GUI Wireless > Timers
C. Verify status ofGUI WLANs > ID > Advanced
D. CLI debug of dot11
E. CLI debug of DHCP
F. Verify Cisco WLC license
G. Verify Cisco WLC model

thanks guardian and wim for your input on #26, but seems it confused me more, haha ;-)

@guardian
for post # 30, correct answers A,E & F.
Explanation:
A- Country : To verify the mismatch in the regulatory domain of the LAP and the WLC.
E- DHCP : To verify whether AP gets an IP address from DHCP server .
F- WLC License : How may APs supported by WLC

Please correct me if I am wrong.

Which statement about an infrastructure basic service set is true according to IEEE 802.11
specifications?

A.
The set also is called an ad hoc network.

B.
The BSSID is generated from the first wireless client that starts up in the IBSS.

C.
The set enables the use of ESS.

D.
No signals are relayed from one client to another client.
Answer: C
Explanation:
The set-up formed by the access point and the stations located within its coverage area are called the basic service set (or infrastructure basic service set, or BSS for short). Each BSS forms one cell.

We can link several BSS’s together (it means we link access points) using a connection called a distribution system in order to form an extended service set or ESS. The distribution system can also be a wired network, a cable between two access points or even a wireless network.

Note: When a station moves from one access point to another in an ESS, it is called roaming

Here’s my question:
Dumps said that the correct answer is “C” and think it makes sense based on the explanation. But what about letter A? IBSS is also known as ad-hoc network. Any thought?

@Crimson In question it is mentioned infrastructure thats why the answer is correct . Adhoc is independent basic service set not infrastructure .

**Infrastructure mode requires a central access point that all devices connect to.

oh, ok. Thanks Shab.

How many types of control frames are only used in PCF mode?
it is 2 or 3?

I think 2.
* Contention Free End (CF+End)
* Contention Free End Ack (CF +end_ack_)

I also think 2 is the right choice but the dump says 3

Which statement correctly describes the procedure for a lightweight AP to successfully establish a connection
to a controller?
A. The AP authenticates the received Cisco WLC certificate as valid. The AP then sends its certificate to the
controller.
B. The AP sends its certificate to the controller. The AP thenauthenticates the received Cisco WLC certificate
as valid.
C. The AP sends its certificate to the RADIUS server. The AP then authenticates the controller certificate as
valid.
D. The AP sends its certificate to the RADIUS server. The AP then authenticatesthe RADIUS certificate as
valid.
E. The AP authenticates the received RADIUS server certificate as valid. The AP then sends its certificate to
the RADIUS server.
F. The AP authenticates the received RADIUS server certificate as valid. The AP then sends its certificate to
the controller.

For above question A or B? CBT Nuggets video says that WLC sends its certificate first.

For #36 I see the answer as 5 per below.

“The control frames that are used in PCF mode are as follows:

Contention Free End (CF+End)
Contention Free End Ack (CF +end_ack_)
CF-Ack
CF Ack+CF Poll
CF-Poll”

http://www.ciscopress.com/articles/article.asp?p=1271797&seqNum=2

@qaz on #41
I think CF-ack and CF-poll are for Data Frames

@qaz So which ones are PCF only control frames. I think first two only PCF control frames so the answer is 2 not 3

I am planning to take the exam the day after tomorrow. Anybody who takes exam recently can mention about new questions that are not in the dump.
@Tintin
I am waiting for your questions as far as you remember

@crimson, @guardian

I would still say 5 because CF-ACK and CF-POLL are control frames per the article and only used in PCF mode. They are all CF (contention free) mode control frames which are ONLY used when an AP is operating in PCF mode.

The ACK, RTS, and CTS frames are used in DCF mode.

Per the article you will see each PCF control modes discussed. I took a snippet below of the CF-POLL one.

When an AP takes control of a network and shifts from DCF mode (every station for itself) to PCF mode (the AP is responsible for everyone sending), the AP lets all stations know that they should stop sending by issuing a beacon frame with a duration of 32768. When this happens and everyone stops sending, there is no longer a contention for the medium, because the AP is managing it. This is called a contention free window (CFW). The AP then sends poll messages to each client asking if they have anything to send. This is called a CF-Poll, as illustrated in Figure 7-9.

@qaz
Contention Free End (CF+End)
Contention Free End Ack (CF +end_ack_)
CF-Ack
CF Ack+CF Poll
CF-Poll
The first two is used in only PCF mode. The other ones is used for both PCF or DCF.

Whew! Thanks God I cleared my exam today with 9xx points.

I would like to thank of course God for the guidance and clear mind, because I almost passed-out on my seat due to nervousness like Bob :-).

But of course, I need to thank as well all of you guys in this forum for each and every help provided and for healthy discussion which helps me a lot not just to memorize the answers but to understand why it is the answer. Special mention to Foxx who patiently explaining all the topics with unclear and cloudy questions.

My study materials:
CBT nuggets (repeat thrice), 411q + IMM plus google searching for answers that I didn’t understand why it was the answer, a sneak on OCG, the “Basic Terminologies” post on this site, and page 50 to present of this forum

-No WSC, no DD, no prime, no anyconnect
-2 questions for RRM
-1 service engine
-2 to 3 for mobility anchoring
-all the last part of IMM (just did some twist on the question)
-around 10 questions from 411 that is exactly the same (others are also from 411 and IMM, they just did some twist on the question delivery, arrangement of choices, number of choices)
– I think I got 2 questions that is really new to me that I never encountered from 411 and IMM but I cannot remember even the essence of the question and what topic, I’m sorry

@ guardian
— for control frames for PCF, I got that question and I answered 2
— I also got the question from #39 and I answered AP to send certificate first

@Crimson
Congrats. I will try my chance tomorrow.
From your post, I ask you two question
1. Do you remember question about service engine
2. You mention about pg.50 of this forum. What is in page 50 to study on?