ABC Company has just purchased a 6 dBi patch antenna. After performing some testswith the 6 dBi antenna, they have concluded that more antenna gain is needed to cover their outdoor courtyard. When choosing an antenna with higher gain, what other antenna characteristic will also always change?
A. Maximum input power
B. Fresnel Zone size
C. Beamwidth
D. VSWR Ratio
E. Impedance
正解:C
質問 2:
What phrase correctly completes the following sentence?
When using WMM Power Save operation, a wireless client device______________.
A. Enters a low-power radio state until it receives a WMM PS-Poll frame from the AP
B. Alternates between awake and dozing, depending on its need to transmit and receive information
C. Experiences higher throughput and lower latency than when operating in Active mode
D. Buffers frames destined to the low-power AP until the AP wakes its radio and begins beaconing again
正解:B
質問 3:
What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF transmission line?
A. Animpedance mismatch inthe RF cables and connectors
B. Reflected direct current (DC) voltage on the main RF signal line
C. Crosstalk (inductance) between adjacent RF conductors
D. Attenuation of the RF signal as it travels along the main signal path
正解:A
質問 4:
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
質問 5:
When planning an access point deployment that utilizes Power over Ethernet (PoE) switches at the network edge, what design decision could adversely affect the operation of
802.3-2012, Clause 33 APs?
A. All ports on theEthernet switch will be supporting Class 3 PoE powered devices.
B. The Ethernet switch uplink ports are not connected to an 802.3-2012, Clause 33- compliant core or distribution Ethernet switch.
C. Some APs are connected to a PoE switch and are also receiving power from an AC outlet.
D. A gigabit Ethernet switch port supporting an 802.11a/g AP auto-negotiates to 100 Mbps.
正解:A
質問 6:
Which unit of measurement is an absolute unit that is used to quantify power levels on a linear scale?
A. RSSI
B. dBm
C. SNR
D. VSWR
正解:B
質問 7:
What factors influence the distance that an RF signal can be effectively received? (Choose 3)
A. Transmitting station'soutput power
B. MAC layer encryption
C. Temperature in the Fresnel zone
D. Free Space Path Loss
E. Receiving station's radio sensitivity
F. Transmitting station's power source
正解:A,D,E
質問 8:
An 802.11 WLAN transmitter thatemits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain.
What is the EIRP power output?
A. 2 mW
B. 1000 mW
C. 500 mW
D. 250 mW
正解:B
質問 9:
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
Nakamori -
有難いPass4Testさんに出会って本当に感謝しかありません!前回の試験では及ばず落ちましが4月の試験でPass4Testのこの問題集を購入して今回合格出来ました。