CWNA-106 CWNP Certified Wireless Network Administrator exact Exam Questions

Certified Wireless Network Administrator

Last Update 19 hours ago Total Questions : 120

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Question # 4

What word describes the bending of an RF signal as it passes through a medium of a varying density from that of free space?

Diffraction

Reflection

Refraction

Diffusion

Scattering

Question # 5

What WLAN system feature is required to produce a scenario with the following configuration on a single access point? (Choose 2)

1. SSID = Guest / BSSID = AA:AA:AA:AA:AA:AA /

VLAN = 22 / Subnet = 192.168.22.0 / RF Channel = 6

2. SSID = Corporate / BSSID = BB:BB:BB:BB:BB:BB /

VLAN = 33 / Subnet = 192.168.33.0 / RF Channel = 6 / User Type A

3. SSID = Corporate / BSSID = BB:BB:BB:BB:BB:BB /

VLAN = 44 / Subnet = 192.168.44.0 / RF Channel = 6 / User Type B

Multiple WLAN Profiles

Call Admission Control

Virtual Cell with SCA

Access Categories

User-based authentication

Dual-radio AP hardware

Integrated DHCP server

Question # 6

In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network bandwidth (e.g. 130 Mbps) for user data throughput when multiple clients are actively exchanging data with the AP? (Choose 2)

Radio receiver hardware cannot process data as quickly as it can be transmitted.

Half of the bandwidth is allocated to uplink traffic and half to downlink traffic.

The DCF and EDCA coordination functions require backoff algorithms

WLAN devices cannot detect collisions and must receive positive frame acknowledgment.

APs do not have sufficient wired connection speeds to the LAN.

Question # 7

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

After waiting a SIFS, all APs reply at the same time with a probe response.

After waiting a SIFS, a designated AP sends an ACK, and then replies with a probe response.

Each AP checks with the DHCP server to see if it can respond and then acts accordingly.

For each probe request frame, only one AP may reply with a probe response.

Each AP responds in turn after preparing a probe response and winning contention.

Question # 8

Which of the following frequency ranges are specified for use by IEEE 802.11 radios? (Choose all that apply.)

902 - 928 MHz

2.4000 – 2.4835 GHz

5.15 – 5.25 GHz

5.470 – 5.725 GHz

5.725 – 5.875 GHz

Question # 9

ABC Company has thousands of Wi-Fi users accessing their network on a daily basis. Their WLAN consists of 700 access points, 6 WLAN controllers, and a wireless network management system.

What network functions are performed by the enterprise-class WNMS? (Choose 3)

RF pre-deployment planning and post-deployment reporting of access point locations on a floor plan

Performance and security monitoring of WLAN controllers with alarms and notifications for administrative staff

Radio management, fast roaming, key caching, and other centralized control plane operations

Centralized bridging of guest data traffic and application of firewall and QoS policies to data

Management of WLAN controller configuration and provisioning of firmware updates

Generating, encrypting, and decrypting 802.11 frames and collecting RF radio data.

Question # 10

ABC Company has a 2.4 and 5 GHz WLAN deployment. DFS functionality is enabled as required by the regulatory domain and APs use DFS channels as long as radar is not detected. Band steering is also enabled to encourage dual-band clients to use frequency bands with more capacity.

Your performance analysis shows that many dual-band VoWiFi client devices will move back and forth between 2.4 and 5 GHz as the users roam throughout the building. All APs have 2.4 and 5 GHz radios enabled with transmit power adjusted to accommodate relatively similar cell sizes.

This “band hopping” behavior is viewed by network staff to be undesirable. What is the most likely cause of the unpredictable client band selection behavior?

Interference from 5 GHz radar sources has increased frame corruption and retries on channels 36-48.

5 GHz frequencies offer better RF penetration than 2.4 GHz, but 2.4 GHz offers more voice call capacity and lower latency than 5 GHz.

The voice client does not support DFS, and therefore experiences some 5 GHz coverage holes as it moves through the network.

The client’s band selection algorithm prefers 5 GHz, but band steering behavior usually steers 75-85% of client devices to 2.4 GHz.