PW0-105 Online Practice Questions and Answers

What component of the 802.11 standard allows stations to reserve access to the RF medium for a specified period of time?

A. Long slot times

B. DTIM Interval

C. Listen Interval

D. Probe Request frames

E. RTS or CTS frames

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.

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 three)

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

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

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

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

E. Management of WLAN controller configuration and provisioning of firmware updates

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

What distinguishes an independent basic service set (IBSS) from an infrastructure basic service set (BSS)?

A. An IBSS does not have a distribution system (DS), but a BSS does.

B. An IBSS does not require beacon frames, but a BSS does.

C. An IBSS does not support 802.11 authentication or association, but a BSS does.

D. An IBSS can only operate on a single channel, but a BSS can operate on multiple channels.

What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF transmission line?

A. An impedance mismatch in the RF cables and connectors

B. Reflected direct current (DC) voltage on the main RF signal line

C. Attenuation of the RF signal as it travels along the main signal path

D. Crosstalk (inductance) between adjacent RF conductors

What advantages does using predictive site survey modeling software offer over performing a manual site survey? (Choose two)

A. Predictive modeling software can predict the ideal access point location 100% of the time, whereas the results from manual surveying are less reliable.

B. Predictive modeling software makes it simple to assess multiple different AP locations and then adjust and display the AP's expected coverage pattern in almost real-time.

C. Predictive modeling software provides more reliable data than manual surveys when fine-tuning and validating access point placement after the installation.

D. The exact impact of interference sources from external networks can be more accurately measured when using predictive modeling software than with manual surveys.

E. It takes less time to create an initial site survey for a large facility when using predictive modeling software than when performing a manual survey.

What statements describe industry practices for communication protocols between WLAN controllers and controller-based APs? (Choose two)

A. All vendors use the same protocol so that APs will interoperate with WLAN controllers from other vendors.

B. Some vendors use proprietary protocols, and some vendors use protocols based on public standards like RFCs.

C. For most vendors, the controller-based APs maintain data and control tunnels with at least two controllers for immediate failover and redundancy.

D. All vendors support at least one L2 or L3 broadcast protocol for controller discovery by controller-based APs.

E. All vendors recommend using L2 (instead of L3) controller discovery and tunneling protocols in large enterprises.

Which answer correctly completes the following sentence? The WMM certification, created by the Wi-Fi Alliance, is based on the ___________ coordination function with support for ___________ QoS priority.

A. Hybrid, contention-based

B. Point, scheduled

C. Dynamic, distributed

D. Distributed, trigger-and-delivery

E. Enhanced, contention-free

The IEEE 802.11-2007 standard requires ERP capable devices to be backward compatible with devices using which other 802.11 physical layer specifications (PHYs)? (Choose two)

A. DSSS

B. FHSS

C. HR/DSSS

D. ERP-PBCC

E. DSSS-OFDM

What is the intended use for the WLAN hardware shown in the exhibit?

A. Mounting a lightning arrestor to a grounding rod

B. Mounting an omnidirectional antenna to a mast

C. Mounting an RF amplifier to a dipole antenna

D. Mounting a PoE injector to a perforated radome

E. Mounting an access point to a site survey tripod