What can occur when two copies of a signal wave arrive at the receiver at the same time, but 180 degrees out of phase which each other?
A. Increased signal amplitude
B. Bits may be added to the total count
C. Increased signal strength
D. Signal nulling or cancellation
Of the following device types, which one is most likely to be used in a highly mobile (use while in motion) use case?
A. Desktop
B. Video camera
C. VoIP handset
D. Laptop
What device type is configured to respond when a probe request is received in a BSS?
A. Desktop
B. Switch
C. Laptop
D. AP
What process is used after authentication to generate and install encryption keys on 802.11 devices using WPA2?
A. 802.1X port-based authentication
B. Passphrase to PSK mapping algorithm
C. EAP authentication
D. 4-way handshake
A dual-band AP most likely supports what two frequency bands?
A. Sub-1 GHz and 2.4 GHz
B. 2.4 GHz and 60 GHz
C. 5 GHz and 60 GHz
D. 2.4 GHz and 5 GHz
What kind of AP mounting kit is most likely to use U-brackets?
A. Desktop mount
B. Ceiling mount
C. Pole/mast mount
D. Wall mount
When configuring a standalone AP with a web-based interface, what should be changed to protect the HTTP interface used to manage the AP?
A. Admin account password
B. WPA2 passphrase
C. SSID
D. WPA passphrase
You are receiving reports from several users that their clients connect with very low data rates. All reports are confined to a particular area in the facility and the users report that the problem does not occur with the same devices in other areas. What is most likely problem in that area?
A. High SNR
B. Improper AP security configuration
C. Poor signal strength
D. Improper client security configuration
A user reports sporadic performance problems with the WLAN. She works near the company lunch room, which has typical kitchen equipment. The problems seem to be worse during the lunch hour. What is the likely case?
A. Improper security settings
B. RF interference
C. Improper roaming settings
D. Improper band preference settings
You use 802.1X/EAP for all WLAN authentication in your network. You have several VoIP handsets that work well until they have to roam from one AP to another. When they roam, calls are often dropped or call quality is significantly diminished. What is the most likely cause of this problem?
A. Wrong passphrase entered on the VoIP handsets
B. Non-implemented roaming features on the APs
C. Wrong SSID used by the VoIP handsets
D. Wrong certificate installed on the VoIP handsets