The client devices that connect to your network include a mix of dual-band 802.11n and 802.11ac, 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. When the client sends a probe request in the 2.4GHz band, the AP may reply with information about the 5 GHz BSS.
B. The AP may ignore the initial probe requests or 802.11 authentication requests sent in the 2.4 GHz band by dual-band clients
C. 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.
D. 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.
When designing a WLAN infrastructure implementation for high client density at a public venue such as a conference or stadium, what are common best practices? (Choose 2)
A. Use high-gain omnidirectional antennas to improve SNR
B. Use directional antennas to isolate the RF propagation
C. Configure APs to transmit at or near their maximum power setting
D. UseWPA2-Personal security for ease of deployment
E. Disable 802.11ac MCS rates to prevent high overhead protection mechanisms
F. Implement a band steering feature for dual-band clients
ABC Company is planning a point-to-multipoint outdoor bridge deployment with standalone (autonomous)
802.11 bridge units. 802.1X/EAP will be used for bridge authentication. A Linux-based RADIUS server will be used for authentication. What device in the bridge implementation acts as the 802.1X Authenticator?
A. The RADIUS server
B. All non-root bridges
C. A designated non-root bridge
D. The root bridge
E. The Ethernet switch
What is a channel mode specified by the 802.11n (High Throughput) PHY?
A. Frequency Hopping
B. 20/40 MHz
C. 22 MHz
D. 80 MHz
Whatmechanisms are specified by the IEEE 802.11 standard to attempt to prevent multiple radios from transmitting on the RF medium at a given point in time? (Choose 3)
A. Random backoff timer
B. Clear channel assessment
C. Network allocation vector
D. Slot assessment value
E. Collision detection
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. In 802.11ac, changing the security mechanism from WPA2-Personal toWPA2-Enterprise will enable the VHT MCS rates.
D. Compared to an Independent BSS, an Infrastructure BSS can provide almost twice the throughput between wireless nodes.
You are being interviewed by ABC Company for employment as a wireless site surveyexpert. The interviewing manager asks you what items should be included in a site survey report generated as part of a manual site survey process.
What answer would be accurate?
A. Itemized list of equipment, licenses, and support contracts required forthe facility
B. RF heat map illustrating coverage and signal quality for each frequency band
C. Documentation proving proper entry of wall material types into the site survey software
D. Documentation noting how each WLAN user group will authenticate to the network
What type of device often causes interference across 50% or more of the 2.4 GHz frequency band?
A. Military radar
B. Properly configured AP
C. Microwave oven
D. Wireless video camera
E. WIPS sensor
Which unit of measurement is an absolute unit that is used to quantify power levels on a linear scale?
A. dBm
B. SNR
C. RSSI
D. VSWR
The 802.11 protocol specifies a fundamentalchannel access method that is required for all stations and is available for use in all IBSS and BSS networks.
What is this fundamental channel access method called?
A. DCF
B. PCF
C. HCF
D. EDCAF
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