CWNP CWNA-106 問題集

質問 1：
Return Loss is the decrease of forward energy in a system when some of thepower is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
A. High output power at the transmitter and use of a low-gain antenna
B. A Voltage Standing Wave Ratio (VSWR) of 1:1
C. An impedance mismatch between components in the RF system
D. The use of cables longer than onemeter in the RF system
正解：C

質問 2：
You are onsite with a client to perform a post-deployment site survey. When verifying a multiple channel VoWiFi deployment using a VoWiFi handset, which aspect is most important?
A. Configuring DSCP-to-802.11e QoS maps on the handset for each access category.
B. Testing a constant conversation orhandset tone while roaming from area to area, or performing an active survey
C. Performingprotocol analysis with a single wireless adapter that is scanning all channels in use
D. Verifying the VHT functionality to handle the call volume incurred by a single VoIP phone call.
正解：B

質問 3：
What statement about 802.11 WLAN performance is true?
A. Use of larger frame sizes results in greater throughput in low interference environments.
B. BSS support for 65 KB A-MPDUs willincrease the maximum data rate available to client devices.
C. Compared to an Independent BSS, an Infrastructure BSS can provide almost twice the throughput between wireless nodes.
D. In 802.11ac, changing the security mechanism from WPA2-Personal toWPA2-Enterprise will enable the VHT MCS rates.
正解：A

質問 4：
What information is transmitted in the Beacon management frames of an HT access point to communicate about backward compatibility with ERP andHR/DSSS stations? (Choose
2)
A. Power save mode of clients
B. Secondary channel offset
C. HT Protection mode
D. RIFS mode
正解：C

質問 5：
The client devices that connect to your network include a mix of dual-band 802.11n and
8 02.11ac, single-band 802.11b/g/n, and some 802.11a/g/n. Your access points are configured with the same SSID on both the 2.4 and 5 GHz bands. The APs are also configured to prioritize client connectivity to 5 GHz.
How does an AP perform band steering to encourage clients to use 5 GHz?
A. The AP may allow an 802.11 association with the client in the 2.4 GHz band, then the
AP may perform a transparent client handoff by transferring the client's MAC address to the
5 GHz radio.
B. The AP may allow an 802.11 association with the client in the 2.4 GHz band, then send unicast channel switch announcements to the client announcing the 5 GHz channel as the new channel.
C. When the client sends a probe request in the 2.4GHz band, the AP may reply with information about the 5 GHz BSS.
D. The AP may ignore the initial probe requests or 802.11 authentication requests sent in the 2.4 GHz band by dual-band clients
正解：D