Chapter 11: Wireless - LAN/WAN Professional

Chapter 11: Wireless - LAN/WAN Professional
Chapter 11: Wireless
QUESTION 30
A single 802.11g 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.
B.
C.
D.
E.
F.
mismatched TKIP encryption
null SSID
cordless phones
mismatched SSID
metal file cabinets
antenna type or direction
QUESTION 32
Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two.)
A.
B.
C.
D.
E.
The area of overlap of the two cells represents a basic service set (BSS).
The network diagram represents an extended service set (ESS).
Access points in each cell must be configured to use channel 1.
The area of overlap must be less than 10% of the area to ensure connectivity.
The two APs should be configured to operate on different channels.
QUESTION 33
Which two devices can interfere with the operation of a wireless network because they operate on similar
frequencies? (Choose two.)
A.
B.
C.
D.
E.
F.
copier
microwave oven
toaster
cordless phone
IP phone
AM radio
QUESTION 37
What are three basic parameters to configure on a wireless access point? (Choose three.)
A.
B.
C.
D.
E.
F.
SSID
RTS/CTS
AES-CCMP
TKIP/MIC
RF channel
authentication method
QUESTION 69
What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?
A.
B.
C.
D.
6, 9, 12, 18
1, 2, 5.5, 6
5.5, 6, 9, 11
1, 2, 5.5, 11
QUESTION 72
What is the maximum data rate specified for IEEE 802.11b WLANs?
A.
B.
C.
D.
10 Mbps
11 Mbps
54 Mbps
100 Mbps
QUESTION 129
A wireless client cannot connect to an 802.11b/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.
B.
C.
D.
The incorrect channel is configured on the client.
The client's IP address is on the wrong subnet.
The client has an incorrect pre-shared key.
The SSID is configured incorrectly on the client.
QUESTION 130
Which two features did WPAv1 add to address the inherent weaknesses found in WEP? (Choose two.)
A.
B.
C.
D.
E.
a stronger encryption algorithm
key mixing using temporal keys
shared key authentication
a shorter initialization vector
per frame sequence counters
QUESTION 131
Which two wireless encryption methods are based on the RC4 encryption algorithm? (Choose two.)
A.
B.
C.
D.
E.
WEP
CCKM
AES
TKIP
CCMP
QUESTION 253
What is the maximum data rate specified for IEEE 802.11b WLANs?
A.
B.
C.
D.
10 Mbps
11 Mbps
54 Mbps
100 Mbps
QUESTION 289
You have finished physically installing an access point on the ceiling at your office. At a minimum, which
paramenter must be configured on the access point in order to allow a wireless client to operate on it?
A.
B.
C.
D.
E.
AES
PSK
SSID
TKIP
WEP
QUESTION 296
Which additional configuration step is necessary in order to connect to an access point that has SSID
broadcasting disabled?
A.
B.
C.
D.
Set the SSID value in the client software to public.
Configure open authentication on the AP and the client.
Set the SSID value on the client to the SSID configured on the AP.
Configured MAC address filtering to permit the client to connect to the AP.
QUESTION 297
What is one reason that WPA encryption is preferred over WEP?
A.
B.
C.
D.
A WPA key is longer and requires more special characters than the WEP key.
The access point and the client are manually configured with different WPA key values.
WPA key values remain the same until the client configuration is changed.
The values of WPA keys can change dynamically while the system is used.
Answer Key
Answer 30: CEF
Answer 32: BE
Answer 33: BD
Answer 37: AEF
Answer 69: D
Answer 72: B
Answer 129: D
Answer 130: BE
Answer 131: AD
Answer 253: B
Answer 289: C
Answer 296: C
Answer 297: D
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