thegioithongtin
09-07-2008, 09:53
Chao moi nguoi,
Minh dang luyen thi CWNA, mot so cau duoi day minh ko biet dap an nhu the nao? Mong cac ban tra loi giup minh nha. Cam on cac ban nhieu.
1. Given: A company has several stations connected to a single radio access point, and all stations are actively transmitting and receiving in the BSS. What factors affect the amount of wireless bandwidth available to each station?
A. Number of actively transmitting station association to the access point
B. Beacon interval value configured in the access point
C. Co-located access points on non-overlapping channels
D. Distance from the access point to the most distant station
E. The layer 3 protocol used by each station to transmit data over the wireless link
2. When using 802.3af-compliant Power-over-ethernet switches at the network edge, what situation has the potential to adversely affect the proper operation of your 802.3af-compliant access points?
A. a large number of 802.3af-compliant VoIP phones are attached to the same Ethernet switch
B. Access points that do not support the 802.3af standard are attached to the same Ethernet switch
C. The Ethernet switch’s uplink ports are not connected to an 802.3af-compliant core or distribution Ethernet switch
D. PoE is provided on both 10/100 and 1000BaseTX ports on the same Ethernet switch
3. Given: Before performing a site survey for a hospital, the network manager notifies you that there is a connection-oriented, real-time medical application used across the hospital’s wired network. This application will also be used on the wireless LAN once it is installed. Vecause the application is real-time, it is sensitive to service disruptions and latency. For this reason, it is particularly important to locate sources of RF interference, blockage, and dead spots. What can put the application at risk of time-out?
A. High concentration of patients in an area
B. Long hallways
C. Elevator shafts
D. Metal mesh glass
E. Intercom system
4. What items are essential for performing an RF site survey on a warehouse facility?
A. Facility floor plans showing wiring closet locations
B. forklift for moving stored materials when necessary
C. High-gain antennas for use in penetrating chain link fences
D. Long category 5 cables for connecting access points to wiring closets
E. Lifts and ladders for mounting temporary access points
5. What EAP types require the 802.1x authentication server to have an X.509 certificate installed?
A. EAP-TTLS
B. EAP-TLS
C. PEAP-MS-CHAPv2
D. EAP-SIM
E. EAP-FAST
F. EAP-GTC
6. Given: XYZ Company is planning to install a new 802.11a/g wireless LAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. XYZ has hired you to perform the site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11a/g access points, both using 802.3af compliant PoE. After hearing this information, what immediate concerns do you note?
A. VoIP phones and 802.11a/g access points should never be powered by the same edge switch
B. The 802.3af standard does not specify the use of VoIP phones, so their voltage and pinouts are proprietary and incompatible with 802.3af compliant 802.11 access points
C. VoIP phones can only powered using PoE up to 50 meters while 802.11 access points can be powered using PoE up to 100 meters
D. the power budget in the edge switches must be carefully planned and monitored
7. Given: You are being interviewed by ABC company for a possible as a wireless site survey engineer. The interviewing manager asks you what items should be included in a typical RF site survey report. What is your response?
A. Cost estimate of the WLAN equipment
B. RF coverage map for each 802.11 physical layer type being considered
C. Detailed documentation on physical security hazards in the RF coverage area
D. A list of RF interference sources and a diagram of dead spots
E. Documentation on how each WLAN user group will authenticate to the network
8. Given: You are an independent contractor, hired to perform a site survey for ABC hospital. You are interviewing the network manager to gather business, performance, and security requirements for the future 802.11g wireless LAN. What questions should you ask the network manager?
A. Are there any occasions when an abnormally high number of WLAN users will be present in particular area?
B. Are there any applications that will require full-duplex communication over the WLAN?
C. Will the Wireless Intrusion Prevention System platform be distributed or centralized?
D. Are there any time-sensitive applications that will operate over the WLAN?
E. Are there any cellular handsets in use at the hospital that would by conflict with the WLAN?
Minh dang luyen thi CWNA, mot so cau duoi day minh ko biet dap an nhu the nao? Mong cac ban tra loi giup minh nha. Cam on cac ban nhieu.
1. Given: A company has several stations connected to a single radio access point, and all stations are actively transmitting and receiving in the BSS. What factors affect the amount of wireless bandwidth available to each station?
A. Number of actively transmitting station association to the access point
B. Beacon interval value configured in the access point
C. Co-located access points on non-overlapping channels
D. Distance from the access point to the most distant station
E. The layer 3 protocol used by each station to transmit data over the wireless link
2. When using 802.3af-compliant Power-over-ethernet switches at the network edge, what situation has the potential to adversely affect the proper operation of your 802.3af-compliant access points?
A. a large number of 802.3af-compliant VoIP phones are attached to the same Ethernet switch
B. Access points that do not support the 802.3af standard are attached to the same Ethernet switch
C. The Ethernet switch’s uplink ports are not connected to an 802.3af-compliant core or distribution Ethernet switch
D. PoE is provided on both 10/100 and 1000BaseTX ports on the same Ethernet switch
3. Given: Before performing a site survey for a hospital, the network manager notifies you that there is a connection-oriented, real-time medical application used across the hospital’s wired network. This application will also be used on the wireless LAN once it is installed. Vecause the application is real-time, it is sensitive to service disruptions and latency. For this reason, it is particularly important to locate sources of RF interference, blockage, and dead spots. What can put the application at risk of time-out?
A. High concentration of patients in an area
B. Long hallways
C. Elevator shafts
D. Metal mesh glass
E. Intercom system
4. What items are essential for performing an RF site survey on a warehouse facility?
A. Facility floor plans showing wiring closet locations
B. forklift for moving stored materials when necessary
C. High-gain antennas for use in penetrating chain link fences
D. Long category 5 cables for connecting access points to wiring closets
E. Lifts and ladders for mounting temporary access points
5. What EAP types require the 802.1x authentication server to have an X.509 certificate installed?
A. EAP-TTLS
B. EAP-TLS
C. PEAP-MS-CHAPv2
D. EAP-SIM
E. EAP-FAST
F. EAP-GTC
6. Given: XYZ Company is planning to install a new 802.11a/g wireless LAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. XYZ has hired you to perform the site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11a/g access points, both using 802.3af compliant PoE. After hearing this information, what immediate concerns do you note?
A. VoIP phones and 802.11a/g access points should never be powered by the same edge switch
B. The 802.3af standard does not specify the use of VoIP phones, so their voltage and pinouts are proprietary and incompatible with 802.3af compliant 802.11 access points
C. VoIP phones can only powered using PoE up to 50 meters while 802.11 access points can be powered using PoE up to 100 meters
D. the power budget in the edge switches must be carefully planned and monitored
7. Given: You are being interviewed by ABC company for a possible as a wireless site survey engineer. The interviewing manager asks you what items should be included in a typical RF site survey report. What is your response?
A. Cost estimate of the WLAN equipment
B. RF coverage map for each 802.11 physical layer type being considered
C. Detailed documentation on physical security hazards in the RF coverage area
D. A list of RF interference sources and a diagram of dead spots
E. Documentation on how each WLAN user group will authenticate to the network
8. Given: You are an independent contractor, hired to perform a site survey for ABC hospital. You are interviewing the network manager to gather business, performance, and security requirements for the future 802.11g wireless LAN. What questions should you ask the network manager?
A. Are there any occasions when an abnormally high number of WLAN users will be present in particular area?
B. Are there any applications that will require full-duplex communication over the WLAN?
C. Will the Wireless Intrusion Prevention System platform be distributed or centralized?
D. Are there any time-sensitive applications that will operate over the WLAN?
E. Are there any cellular handsets in use at the hospital that would by conflict with the WLAN?