Transcript
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
