PW0-105 Online Practice Questions and Answers

What answers correctly complete the following sentence? ____________ and ____________ carrier sense functions are used to determine whether the wireless medium is idle or busy. (Choose 2)

A. Passive

B. Pseudo-random

C. Virtual

D. Active

E. Physical

F. Interframe

G. Vector

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

A. Multiple WLAN Profiles

B. Call Admission Control

C. Virtual Cell with SCA

D. Access Categories

E. User-based authentication

F. Dual-radio AP hardware

G. Integrated DHCP server

ABC Company has a 2.4 and 5 GHz WLAN deployment supporting four bands in the 5 GHz range (UNII 1, UNII 2, UNII 2e, and UNII 3). DFS functionality is enabled as required by the regulatory domain. 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 user roams throughout the building. All APs have 2.4 and 5 GHz radios enabled. 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?

A. Interference from 5 GHz radar sources has increased frame corruption and retries on channels 36-48 in UNII 1.

B. 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.

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

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

What factor is NOT taken into account when calculating the Link Budget of a point-to-point outdoor WLAN bridge link?

A. Operating frequency

B. Transmit antenna gain

C. Transmit power

D. Antenna height

E. Receive sensitivity

F. Distance

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. 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 problems may exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)? (Choose two)

A. Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.

B. WLAN client stations can experience the hidden node problem when located near each other within the same cell.

C. The mismatched power between WLAN client stations and APs violates regulatory and IEEE signal quality requirements.

D. Cell size may be too large, causing co-channel interference to adjacent cells and reducing system capacity.

E. APs operating in the 2.4 GHz band would prevent microwave ovens and analog video cameras from functioning.

What term describes the effect of increasing the intensity of an RF wave with an antenna by focusing the energy in a specific direction?

A. Spatial Multiplexing

B. Active Amplification

C. Beam Compression

D. Passive Gain

E. Isotropic Radiation

What term correctly completes the following sentence?

802.11a/b/g used a mandatory 800ns guard interval. 802.11n introduces an optional short 400ns guard interval. Guard intervals (GI) are necessary in OFDM to reduce the likelihood of interference between two consecutive ____________.

A. Frames

B. Packets

C. Segments

D. Bits

E. Bytes

F. Symbols

What is required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?

A. Minimum output power level of 1 W

B. Accurate Earth Bulge calculations

C. Directional antennas at each endpoint

D. A minimum antenna gain of 13 dBi at both endpoints

E. A Fresnel Zone that is at least 60% clear of obstructions

In an infrastructure Basic Service Set (BSS), how does the passive scanning process occur?

A. Access points broadcast Beacons on all channels of each radio within the regulatory domain. Nearby client stations record information found in the Beacons for use in the association process.

B. Client stations broadcast Probe Request frames on all supported channels in the regulatory domain. Nearby access points respond with Probe Response frames. Client stations record information in the Probe Response frames for use in the association process.

C. Client stations broadcast Probe Request frames on the single channel for which they are programmed. Nearby access points respond on that channel with Probe Response frames. Clientstations record information found in the Probe Response frames for use in the association process.

D. Access points broadcast Beacons on a single channel for which it is programmed. Nearby client stations listen for Beacon frames and record information found in the Beacons for use in the association process.