What statement accurately describes the RF cables and connectors that are used in an
802.11 WLAN 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 2:
You support a WLAN using dual- band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him?
A. Due to 802.11 network operations and dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gbps Ethernet link .
B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
C. His concern is valid and the company should upgrade all Ethernet link to 10 Gbps immediately.
D. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.
正解:C
質問 3:
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
A. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
B. OFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well
C. OFDM modulation is used only in 5 GHz 802. 11 transmissions.
D. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
正解:C
質問 4:
You are deploying a WLAN with the access points configured for 10 mW of output power on the
2.4 GHz radios and 20 mW of output power on the 5 GHz radios. Some semi- directional antennas are also in use. What kind of deployment is described?
A. Standard office
B. High density
C. SOHO
D. Residential
正解:B
質問 5:
As a consultant, you've been hired by XYZ Company to provide recommendations about client device selection, operation, and interoperability. What information should be considered to help them choose the right WLAN client devices?
A. 802.11ac devices support the features of the VHT PHY only in the 5 GHz frequency band.
B. When HR/DSSS devices are present, VHT MCS rates are disabled for the entire BSS.
C. 802.11n OFDM is more susceptible to high-power, narrowband interference than 802.11a
D. 802.11ac is not backwardly compatible with 802.11n or 802.11a.
E. In order to earn Wi-Fi Alliance certification, 802.11n clients stations are required to support both
2.4 and 5 GHz frequencies
正解:A
毛利** -
合格いたしました!Pass4Testさん、今後もお世話になります。ここ合格率高ぇな