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
I had several of these on ICND!
On 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 the answer should be AB.
WPA uses TKIP: key mixing using temporal keys and it is a stronger encryption algorithm.
Can anyone elaborate on questions 9 and 10?
Q9: 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?
Why “D. The SSID is configured incorrectly on the client.”? Why not “A” for example? Or even “C” if we’re talking about a WPA/WPA2 connection?
Q10: Which two features did WPAv1 add to address the inherent weaknesses found in WEP?
I think I like A and B better.
@whoa
Q9: I think this simply means that client had connection to another AP otherwise he couldn’t connect to any AP.
@whoa::it can be A”The incorrect channel is configured on the client”
bcz channel always configured or set on Ap not on the client dude.
@9tut:regarding to question no10
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 is simple do WEP and WPA using the same algo,,,if not then A should also correct
Correct Ans (B,E) is extra feature’s of WPAV1. WEP also using RC4. But WPAV1 using RC4 with TKIP.
Guys….I came across a question in my CCNA
Which Security appliance would you use in a WAN network? I don’t remember the options but can you tell me what could be the possible answer?
thank you 9tut,
I won my ccna an hour ago with 881.
Most of your question is still actual especially acl, vtp/vlan/stp and eigrp labs.
Next step ccnp.
thanks!
Q. 5
The correct answer should be B & D
This is so the device is not disconnected.
d? read it out to yourself. basic principle of ESS and roaming overlap must be GREATER than 10%, so “The area of overlap must be less than 10% of the area to ensure connectivity”.
is sooooooooo wrong!
@Rohit
I think its ASA( adaptive security appliance ) OR IPS(intrusion prevention system )
@Rohit: Brother there are two Security Appliance.. IDS and IPS!…
hope these were in options:)
Tell me, how many type of elements of WLAN ?
@WI-FI: You should read my Wireless tutorial: http://www.9tut.com/wireless-tutorial
Can somebody pls explain Q7 ?
Can any one let me use there ccna certication code. My job is doing a ccna verification as a partner. email back at ralvarez_72@yahoo.com
Thanks for you help inadvance
Roberto
@Need a CCNA Certication code
First its spelled Certification!
Second, go smoke crack somewhere else!
Guys.
How does AP work?
1) Switch
2) Hub
I think Hub, because user access in half duplex mode.
@claudio
AP = (Wireless) Access Point?
if yes then you could say it works in a way similar to the LAN hub
@xallax.
So Wireless Tutorial says:
“WLAN can’t use CSMA/CD as a sending device can’t transmit and receive data at the same time”.
How do Access Point work?
I think like a Hub
@claudio
yes, there is no collision detection cause… it’s all radio frequency. still, there is collision avoidance. devices send when their turn comes.
http://en.wikipedia.org/wiki/Carrier_sense_multiple_access_with_collision_avoidance
@xallax
¿then, AP is a hub or switch?
neither of them. AP is a way for devices to communicate without using cables.
Hi, Appreciate if someone could send me the latest dumps at treepanel.ken@hotmail.com , i plan to take the exams at the end of sep.
Thanks.
@ anyone can u send me the latest CCNA actual exam?
please send it to sab3001@hotmail.com
Appreciate anyone who will share it. Thanks!
Cisco Wireless Explorer..
http://www.medcalf.com/games/cisco_games/game_page.html?userName=Melissa&game=wireless
play this game..cooool
@xallax: On the other hand hosts connected to AP have to share RF channel like hosts connected to a hub. So from a view of bandwidth AP is a sort of hub.
))
three access point have been installed and configured to cover a small office. What term defines the wireless topology?
A)BSS
B)IBSS
C)ESS
D)SSID
can anyone pls tell me the right answer..some dumps have SSID and Some dumps have ESS.
PLs pls help me i have exam after after 2 days..very urgent..
@hardika gandhi
SSID is the broadcasted name of the wireless network
ESS (extended service set) is defined by the area covered by multiple APs belonging to the same wireless network.
ESS is the correct answer.
read more here:
http://www.9tut.com/wireless-tutorial
Can someone explain Q7 ?
why 1,2,5.5 11 need to disable ? any reference ? thanks
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
@nc
because those are the speeds at which 802.11b operates.
if you disable all those speeds then what clients can connect? only the ones that support other speeds and those are clients 802.11g wireless cards.
I have just 3 days on my exam can I finish studying in three days ??
i had 4 wireless question on my exam 4 and 7 were on my exam today
what is mean by “1,2,5.5 11″ in in Q7.
please anyone explain.
@shashika
those are the speed values in Mbps
1 Mbps
2 Mbps
5.5 Mbps
11 Mbps
those are configurable speed values for 802.11b wireless interfaces.
important: 1 MBps = 8 Mbps
hello to all friend`s in this website, I searched a long time about latest CCNA exam , unfortunatley i couldnt find any thing , can any one help me by sending the last exam (as possible as closed to this month october) at my email : akourani1@hotmail.com , and i would be so thankful
Hi all / 9tut
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
i don’t really get why the answer is “D” please kindly do explain :D thanks
@Conan: I have just added explanation to that question, please check again.
Thanks 9tut, :D
@9tut THX , studding from Costa Rica at work ! about to take 640-802 test on a couple of weeks any good tip at lokazotico_rasta@hotmail.com PLZ !!!!!!
I just pass CCNA, thanks to 9tut and exam collection, labs are VTP, EIGRP, and ACL2….good luck
@ 9 tut
Just took the exam yesterday, i passed with 986/1000 and there was that question that hardika gandhi posted !! My point is that this question is still valid koz i got it.. so it will be good for other candidates if you could post this question. Thanks :D
@ guys here :)
what is the best answer for Q-10 plz ?
i prefer A, B but 9tut answer is B, E !!
thnx in advance
PlZ send me latest dumps
Hossam.saber4@gmail.com
thnx in advance
Plz also send me the lastest dumps or ccna question my email is kevonstl@yahoo.com. I took the courses at community college but doesn’t seem to help a lot on some of these questions
Thanks
can someone explain question 4 please??
@chokka
A. mismatched TKIP encryption
it says a few users have poor quality. that means they get connected. false
B. null SSID
same as A. wrong
C. cordless phones
these are said to operate on the same frequency (2.5 GHz band) as 802.11b/g. true
D.mismatched SSID
same as A and B. wrong
E. metal file cabinets
these would shield an area from radio waves, the result is decreased signal strength and quality. true
F. antenna type or direction
if the antenna is a unidirectional one and you’ve pointed it wrong then you got a problem. true
very good answer xallax
Q9 why is C not correct? Based on experience it’s a common reason not to be able to connect to an AP if the password is incorrect.