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質問 1：
You are selecting antennas for a WLAN operating in the 5 GHz frequency band. What specifications should be evaluated for an antenna before it is implemented in this WLAN system?
A. 802.11ad compatibility
B. Return Loss Rating
C. Impedance in Ohms
D. TPC support
正解：C
質問 2：
What statement accurately describes the RF cables and connectors that are used in an
802.11WLAN system?
A. Some RF connectorsdo not cause insertion loss.
B. Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
C. 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.
D. Large diameter RF cables cause greater loss than small diameter cables.
正解：B
質問 3：
As a consultant, you have been hired by ABC Company to implement an outdoor WLAN connection between two buildings that are 2 kilometers (1.24 miles) from each other, with no obstructions in between.
Your first required objective is to create a point-to-point link between the two buildings within the local regulatory body's 800 mW EIRP maximum.
Your second required objective is to provide an industry-standard security solution capable of supporting mutual authentication.
As an optional objective, you must minimize the amount of interference from, and to, nearby WLAN networks.
You install an OFDM wireless bridge at each building, configuring one in root mode and the other in non-root mode. You set each radio for 100 mW (20 dBm) and attach 9 dBi omni- directional antennas to both. You configure the network for WPA2-Enterprise with
PEAPv0/EAP-MSCHAPv2 authentication.
Which statement is true about the solution you chose to deploy?
A. Your solution meets bothrequired objectives and the optional objective.
B. Your solution meets neither required objective but meets the optional objective.
C. Your solution meets the second required objective and the optional objective, but not the first required objective.
D. Your solution meets both required objectives, but does not meet the optional objective.
正解：D
質問 4：
You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion? (Choose 2)
A. Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposingthe WPA key.
B. To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.
C. Although it does not benefit the security posture, hiding the SSID in Beacons and Probe
Response frames can be helpful for preventing some users (such as guests) from attempting to connect tothe corporate network.
D. Any 802.11 protocol analyzer can see the SSID in clear text inframes other than
Beacons and Probe Responseframes. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.
E. This security practice prevents manufacturers' client utilities from detecting the SSID. As a result,the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.
正解：C,D
質問 5：
You have been sent as a consultant to a customer site that is experiencing problems with some 2.4 GHz clients on their 802.11a/g/n/ac network. After collecting informationfrom the company about the problem, your initial troubleshooting step is to find a client device experiencing performance problems and observe its 802.11 frame exchanges in a protocol analyzer. The retransmission rate for that client is 65% instead of thecompany's baseline, which is 9%.
Based on this information, what troubleshooting step should follow to isolate the problem?
A. Utilize a laptop-based site survey and planning tool to create a predictive model of the optimal AP placement in the customer's facility.
B. Check theframe decodes in the protocol analyzer and look for an excessive number of deauthentication frames.
C. With a protocol analyzer, identify the client's roaming threshold settings and reassociation behavior.
D. Install Wi-Fi endpoint security and reporting software on the client device to monitor and log the retransmission behavior.
E. Evaluate the client's operating frequency band with a spectrum analyzer, looking for a high noise floor or interference sources.
正解：E
質問 6：
What statements describe industry practices for communication protocols between
WLANcontrollers and controller-based APs? (Choose 2)
A. For most vendors, the controller-based APs maintain data and control tunnels with at least two controllers for immediate failover and redundancy.
B. Some vendors use proprietary protocols, and some vendorsuse protocols based on public standards like RFCs.
C. All vendors use the same protocol so that APs will interoperate with WLAN controllers from other vendors.
D. All vendors support at least one L2 or L3 broadcastprotocol for controller discovery by controller-based APs.
E. All vendors recommend using L2 (instead of L3) controller discovery and tunneling protocols in large enterprises.
正解：B,D
質問 7：
Two co-located 802.11b/g/n APs caninterfere with one another and cause contention and collisions, even when the two APs are operating on non-overlapping channels (e.g. 1 & 6).
What deployment flaw could cause this problem? (Choose 2)
A. A client station is usingactive scanning to probe for access points on multiple channels.
B. Reflective objects in the area are causing significant multipath.
C. The access points are not synchronized to the same NTP server.
D. A client station authenticatesto both access points, but does not associate.
E. The output power on the access points is too high.
F. The access points are mounted too closely to one another.
正解：E,F
質問 8：
What answer correctly completes the following sentence?
____________ and physical carrier sense functions are used to determine if the wireless medium is busy.
A. Active
B. Passive
C. Backup
D. Virtual
正解：D
質問 9：
Two co-located 802.11b/g/n APs can interfere with one another and cause contention and collisions, even whenthe two APs are operating on non-overlapping channels (e.g. 1 & 6).
What deployment flaw could cause this problem?
A. A client station is using active scanning to probe for access points on multiple channels.
B. Reflective objects in the area are causing significant multipath.
C. The access points are not synchronized to the same NTP server.
D. The access points are mounted too closely to one another.
正解：D
You are selecting antennas for a WLAN operating in the 5 GHz frequency band. What specifications should be evaluated for an antenna before it is implemented in this WLAN system?
A. 802.11ad compatibility
B. Return Loss Rating
C. Impedance in Ohms
D. TPC support
正解：C
質問 2：
What statement accurately describes the RF cables and connectors that are used in an
802.11WLAN system?
A. Some RF connectorsdo not cause insertion loss.
B. Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
C. 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.
D. Large diameter RF cables cause greater loss than small diameter cables.
正解：B
質問 3：
As a consultant, you have been hired by ABC Company to implement an outdoor WLAN connection between two buildings that are 2 kilometers (1.24 miles) from each other, with no obstructions in between.
Your first required objective is to create a point-to-point link between the two buildings within the local regulatory body's 800 mW EIRP maximum.
Your second required objective is to provide an industry-standard security solution capable of supporting mutual authentication.
As an optional objective, you must minimize the amount of interference from, and to, nearby WLAN networks.
You install an OFDM wireless bridge at each building, configuring one in root mode and the other in non-root mode. You set each radio for 100 mW (20 dBm) and attach 9 dBi omni- directional antennas to both. You configure the network for WPA2-Enterprise with
PEAPv0/EAP-MSCHAPv2 authentication.
Which statement is true about the solution you chose to deploy?
A. Your solution meets bothrequired objectives and the optional objective.
B. Your solution meets neither required objective but meets the optional objective.
C. Your solution meets the second required objective and the optional objective, but not the first required objective.
D. Your solution meets both required objectives, but does not meet the optional objective.
正解：D
質問 4：
You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion? (Choose 2)
A. Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposingthe WPA key.
B. To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.
C. Although it does not benefit the security posture, hiding the SSID in Beacons and Probe
Response frames can be helpful for preventing some users (such as guests) from attempting to connect tothe corporate network.
D. Any 802.11 protocol analyzer can see the SSID in clear text inframes other than
Beacons and Probe Responseframes. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.
E. This security practice prevents manufacturers' client utilities from detecting the SSID. As a result,the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.
正解：C,D
質問 5：
You have been sent as a consultant to a customer site that is experiencing problems with some 2.4 GHz clients on their 802.11a/g/n/ac network. After collecting informationfrom the company about the problem, your initial troubleshooting step is to find a client device experiencing performance problems and observe its 802.11 frame exchanges in a protocol analyzer. The retransmission rate for that client is 65% instead of thecompany's baseline, which is 9%.
Based on this information, what troubleshooting step should follow to isolate the problem?
A. Utilize a laptop-based site survey and planning tool to create a predictive model of the optimal AP placement in the customer's facility.
B. Check theframe decodes in the protocol analyzer and look for an excessive number of deauthentication frames.
C. With a protocol analyzer, identify the client's roaming threshold settings and reassociation behavior.
D. Install Wi-Fi endpoint security and reporting software on the client device to monitor and log the retransmission behavior.
E. Evaluate the client's operating frequency band with a spectrum analyzer, looking for a high noise floor or interference sources.
正解：E
質問 6：
What statements describe industry practices for communication protocols between
WLANcontrollers and controller-based APs? (Choose 2)
A. For most vendors, the controller-based APs maintain data and control tunnels with at least two controllers for immediate failover and redundancy.
B. Some vendors use proprietary protocols, and some vendorsuse protocols based on public standards like RFCs.
C. All vendors use the same protocol so that APs will interoperate with WLAN controllers from other vendors.
D. All vendors support at least one L2 or L3 broadcastprotocol for controller discovery by controller-based APs.
E. All vendors recommend using L2 (instead of L3) controller discovery and tunneling protocols in large enterprises.
正解：B,D
質問 7：
Two co-located 802.11b/g/n APs caninterfere with one another and cause contention and collisions, even when the two APs are operating on non-overlapping channels (e.g. 1 & 6).
What deployment flaw could cause this problem? (Choose 2)
A. A client station is usingactive scanning to probe for access points on multiple channels.
B. Reflective objects in the area are causing significant multipath.
C. The access points are not synchronized to the same NTP server.
D. A client station authenticatesto both access points, but does not associate.
E. The output power on the access points is too high.
F. The access points are mounted too closely to one another.
正解：E,F
質問 8：
What answer correctly completes the following sentence?
____________ and physical carrier sense functions are used to determine if the wireless medium is busy.
A. Active
B. Passive
C. Backup
D. Virtual
正解：D
質問 9：
Two co-located 802.11b/g/n APs can interfere with one another and cause contention and collisions, even whenthe two APs are operating on non-overlapping channels (e.g. 1 & 6).
What deployment flaw could cause this problem?
A. A client station is using active scanning to probe for access points on multiple channels.
B. Reflective objects in the area are causing significant multipath.
C. The access points are not synchronized to the same NTP server.
D. The access points are mounted too closely to one another.
正解：D
风祭** -
CWNA-106問題集のPDF版を購入しました。この問題集を使って、私は試験の問題を答えられて、合格しました。
ありがとうございました。