CCNA – Wireless
Here you will find answers to CCNA Wireless Questions
If you are not sure about Wireless, please read my Wireless tutorial and Basic Wireless Terminologies
Question 1
Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?
A. Set the SSID value in the client software to public.
B. Configure open authentication on the AP and the client.
C. Set the SSID value on the client to the SSID configured on the AP.
D. Configure MAC address filtering to permit the client to connect to the AP.
Answer: C
Question 2
What is one reason that WPA encryption is preferred over WEP?
A. A WPA key is longer and requires more special characters than the WEP key.
B. The access point and the client are manually configured with different WPA key values.
C. WPA key values remain the same until the client configuration is changed.
D. The values of WPA keys can change dynamically while the system is used.
Answer: D
Question 3
Which two devices can interfere with the operation of a wireless network because they operate on similar frequencies? (Choose two)
A. copier
B. microwave oven
C. toaster
D. cordless phone
E. IP phone
F. AM radio
Answer: B D
Question 4
A single 802.11 g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem? (Choose three)
A. mismatched TKIP encryption
B. null SSID
C. cordless phones
D.mismatched SSID
E. metal file cabinets
F. antenna type or direction
Answer: C E F
Question 5
Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two)
A. The area of overlap of the two cells represents a basic service set (BSS).
B. The network diagram represents an extended service set (ESS).
C. Access points in each cell must be configured to use channel 1.
D. The area of overlap must be less than 10% of the area to ensure connectivity.
E. The two APs should be configured to operate on different channels.
Answer: B E
Explanation
A group of access points connected to the same WLAN are known as an Extended Service Set (ESS). Within an ESS, a client can associate with any one of many access points that use the same Extended service set identifier (ESSID). It allows users to roam about an office without losing wireless connection -> B is correct.
Two APs operating near each other should be configured on different channels to avoid interference. There are fourteen channels defined in the IEEE 802.11b channel set. Each channel is 22MHz wide but there is only 5MHz channel separation so the channels are overlapped. Channels 1, 6 and 11 are most commonly used because they do not overlap as shown below:
So if we configure an AP with channel 1 then we should set its nearest AP to channel 6 or 11 to make sure their channels are not overlapped.
Question 6
What are three basic parameters to configure on a wireless access point? (Choose three)
A. SSID
B. RTS/CTS
C. AES-CCMP
D. TKIP/MIC
E. RF channel
F. authentication method
Answer: A E F
Question 7
What speeds must be disabled in a mixed 802.11 b/g WLAN to allow only 802.11 g clients to connect?
A. 6,9,12,18
B. 1,2,5.5,6
C. 5.5,6,9,11
D. 1,2,5.5,11
Answer: D
Explanation
The data rates of 802.11b are 1, 2, 5.5 and 11 Mbps using Direct Sequence Spread Spectrum (DSSS) while the data rates of 802.11g are 1, 2, 5.5, 11 Mbps using DSSS and 6, 9, 12, 18, 24, 36, 48, 54 Mbps using OFDM. So if we only want to allow 802.11g clients, just disable 1, 2, 5.5 and 11 Mbps speed.
Question 8
What is the maximum data rate specified for IEEE 802.11b WLANs?
A. 10 Mbps
B. 11 Mbps
C. 54 Mbps
D. 100 Mbps
Answer: B
Question 9
A wireless client cannot connect to an 802.11 b/g BSS with a b/g wireless card. The client section of the access point does not list any active WLAN clients. What is a possible reason for this?
A. The incorrect channel is configured on the client.
B. The client’s IP address is on the wrong subnet.
C. The client has an incorrect pre-shared key.
D. The SSID is configured incorrectly on the client.
Answer: D
Question 10
Which two features did WPAv1 add to address the inherent weaknesses found in WEP? (Choose two)
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counters
Answer: B E
Question 11
What is the maximum data rate specified for IEEE 802.11b WLANs?
A. 10Mbps
B. 11Mbps
C. 54Mbps
D. 100Mbps
Answer: B
Explanation
Popular wireless standards are listed below:
* IEEE 802.11a: 54 Mbps in the 5.7 GHz ISM band
* IEEE 802.11b: 11 Mbps in the 2.4 GHz ISM band
* IEEE 802.11g: 54 Mbps in the 2.4 GHz ISM band
Question 12
You have finished physically installing an access point on the ceiling at your office. At a minimum, which parameter must be configured on the access point in order to allow a wireless client to operate on it?
A. AES
B. PSK
C. SSID
D. TKIP
E. WEP
Answer: C
@anon
it says the user can’t even see the wireless network to connect to.
that’s the first sign that the problem is with the SSID
@xallax sorry but i can’t see the part where “it says the user can’t even see the wireless network to connect to”.
“The client section of the access point does not list any active WLAN clients.” –> This is on the AP right? Not on the client’s laptop where you can view the available wireless networks.
@anon
nobody connected to the wireless network…
you know what, come to think of it… the password mismatch could also be a problem.
just wondering how many users would know the wrong password for this to happen
For Question 10, I’m having a hard time with A and B not being the correct choices.
Which two features did WPAv1 add to address the inherent weaknesses found in WEP? (Choose two)
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counters
From the CCNA bootcamp:
Soon after Cisco wireless security implementation, the Wi-Fi Alliance introduced Wi-Fi Protected Access (WPA) as an interim solution that was a subset of the expected IEEE 802.11i security standard for WLANs using 802.1x authentication and improvements to WEP encryption. The newer key-hashing TKIP has features similar to those provided by Cisco Key Integrity Protocol and message integrity check (MIC) but these three security implementations are not compatible.
Have a question.
When the ‘show arp’ command is issued, what parameter(s) will show me the local or remote interfaces?
thanks in advance
Does anyone knows if questions in all have changed in 2012, i am schedule to take my test next Wednesday. I am particularly interested in labs. please if you have visited 9tut and taken your test this year, please advise.
God bless!
@PGK
I took the test this morning passed with a 920 score. Nothing has changed. Same Sims VTP, ACL2 and EIGRP. Also I only used this site for studying for the most part
@ Reggie and anyone preparing for the CCNA test.
Thank you Reggie for the update. I passed my exam today with a score of 947, and the sims I got where VTP, ACL2 and EIGRP and a lot of questions from 9tut.
Thank you 9tut for all you do and your question bank.
Guys, instead of asking for dumps, 9tut already has the questions, just read a required book to get the knowledge and practice with all AND I mean ALL the questions in 9tut, you will pass the exam. Also one important thing, for the question you miss read the explanation attentively!
God bless all.
By the way, 9tut questions are still valid
@ Reggie: do u have any idea how do they program the date of the exam? i need to know when could be the next exam? and how long did u take to prepare for the exam?and my last question u said that vtp,acl and eigrp are still the same does that mean that the other chapter have changed? please i need answers
thanks to everyone on here and 9tut…
keep up the good work…
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pls reply
Hi 9tut… Hi Guys! Can you please help me… I will take exam this Feb. Please send me latest dump so that I will have an idea for the exam.. rico.blake@ymail.com
Thanks Guys!
Q10
Question 10
Which two features did WPAv1 add to address the inherent weaknesses found in WEP? (Choose two)
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counters
I think B is not correct, because “dynamic key management” was implemented in WPA2, not in WPA1….
@levy
The dynamic key management was introduced for strong security in WPA 1 to overcome the weak security provided by WEP. WPA 2 uses a kind of encryption called Advanced Encryption Standard-Counter with CBC-MAC replacing RC4 encryption adopted in both wired equivalent privacy (WEP-40-bit RC-4 encryption) and WPA1(128-bit encryption RC-4 encryption). for any doubts read the ccna wireless tutorial give by 9tut on top of the webpage……..
hi all!
about Question 10, please explain for me the answer E, thanks so much!
Q7 was there in today’s exam.
http://www.examcollection.com/cisco/Cisco.Acme.640-802.v2012-02-07.by.Arpit.486q.vce.file.html
Most Valid Dump.. All most 99% answers are correct.
Which two features did WPAv1 add to address the inherent weaknesses found in WEP? (Choose two)
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counters
Correct Answer needed
Which two wireless encryption methods are based on the RC4 encryption algorithm? (Choose two.)
A. WEP
B. CCKM
C. AES
D. TKIP
E. ccmp
Correct Answer Needed
@raman
RC4 is considered a weak encryption protocol.
it is used in WEP and TKIP
TKIP is better than WEP, but it uses RC4 to allow compatibility with older devices that had only WEP characteristics.
http://en.wikipedia.org/wiki/RC4
http://en.wikipedia.org/wiki/Wired_Equivalent_Privacy
http://en.wikipedia.org/wiki/Temporal_Key_Integrity_Protocol
Great sallax for ur timely
Appreciate your efforts
Which two features did WPAv1 add to address the inherent weaknesses found in WEP?
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counters
In todd lamlee, WPA addressed the inherit weaknesses found in WEP by adding a
stronger encryption algorithm (although it still uses RC4, which isn’t that great), and per frame sequence counters.
But Here it says key mixing using temporal keys and per frame sequence counters
Please help me tis
@ramanan
wpa used TKIP (which uses RC4)
http://en.wikipedia.org/wiki/Temporal_Key_Integrity_Protocol
“TKIP employs a per-packet key, meaning that it dynamically generates a new 128-bit key for each packet and thus prevents the types of attacks that compromised WEP”
Cool Xallax,
Which two features did WPAv1 add to address the inherent weaknesses found in WEP?
A. a stronger encryption algorithm
B. key mixing using temporal keys
C. shared key authentication
D. a shorter initialization vector
E. per frame sequence counters
So @Xallax Correct answer for above question : (B) key mixing using temporal keys (E) per frame sequence counters
@ramanan
no, A and B :)
it has better encryption and uses TKIP
@ Xallax : But Q10, the ans is given as B and E ? Can u please suggest which one is right?..Thanks
@hari
i still believe the encryption is better because it is done on each packet based on changing keys.
address 9tut on that please :)
@Hari, @xallax: Both WEP and WPA use RC4 encryption so A is not correct.
@9tut
thank you
@ Xallax & @9tut : Thanks Guys for ur help!!!
Any one from here can help me for my CCNA exam next month.Hope you can send me a latest dump. Thank you so much.. please send it to my mail: erwin_principe@yahoo.com
go to share your experience section
and faqs and tips
H!Folks am joey n i’ll be taken ma exams early next month ba am very confused aba this particular drag and drop question..And it goes like
point-point
Advantage Disadvantage
Quality limited flexibility
Circuit Switched
Advantage Disadvantage
Efficient low speed
Packet Switched
Advantage Disadvantage
Cost More Complex
Just as it has being arranged some dumps also tell u that the it is this way round for the CIRCUIT SWITCHED AND PACKET SWITCHED
Advantage Disadvantage Advantage Disadvantage
Cost low speed Efficient More Complex
So folks i want to know which of the two pairs are/is correct!!!!!!!!!! thnkx in advance
Q2, Q7 in exam.
Will be taking my exam in 2 weeks time pliz send me latest dumbs to tkarombe@gmail.com. Thanks in advance!!!
Hi Guys,
Today is my great day,
thanks God, thanks 9tut help me to reach 986 of 1000.
today, I got question 7 of this topic!
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thanks 9tut!=D
Q7 & Q3 today in exam
I had several of these on my CCNA exam, which was May 4th.
I also have trouble with Q9. I’ve been studing CCNA wireless for a while and have my own small lab setup. Answer D is less correct than answer C because::
SSID by default is broadcast via beacons, clients respond and authenicate via the beacons so D is only correct if SSID cloaking is deployed – which is not the default for APs.
An correct pre-shared key will certainly cause the AP to not show active client connections.
I’ve tested this and got the above results with my own lab.
The same question is in Todd Lammies CCNA V7 book, it also preferres D over C, I wrote to Todd twice on this but yet to date no reply.
Q3,4,6 were in my exam today…
Please send me the latest dumps please..
Email: jpmarinm@gmail.com
Hi all, I am taking CCNA 640-802 exam first time on 30/05/2012. Could anyone please send me latest dumps which are valid for UK? My e-mail address is puneet_gill84@yahoo.co.uk. Many thanks.
q2 and q7 cost me my cert today! 815/825!
I PASSED CCNA TODAY THANKS TO ALLAH
960/1000
I PASSED TODAY ALSO WITH A 960/1000 THANKS 9TUT!!!!
I passed my ccna exam today Praise be to God! Thank you Jesus! and thanks to 9TUT for the tutorials and explanations, great site and thanks to xallax for your explanations to questions and thanks to http://www.examcollection.com for the dumps. Pls guys lets donate and help to keep this site up!
48 ques for exams including 3 simulation, I had EIGRP, Acesslist2 and VTP. Make sure the you practice the simulation, use packet tracer or gns3. Best wishes to all!