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Question 61.

Which design activity establishes required wireless performance targets?

1. Requirements gathering
2. Cable termination
3. Account provisioning
4. Switch staging

Correct Answer: 1

Explanation:

Requirements gathering establishes the business and technical expectations that the WLAN must satisfy. During this stage, designers identify application needs, user populations, device types, coverage areas, performance expectations, security requirements, and environmental constraints. These requirements provide measurable targets for subsequent design and validation activities. Without clear requirements, a WLAN may provide connectivity but fail to support the actual workloads expected by users. Cable termination, account provisioning, and switch staging are implementation activities and do not establish the fundamental wireless performance objectives.

Question 62.

What should a WLAN designer identify before selecting AP locations?

1. User email format
2. Physical obstacles
3. Database indexes
4. Printer drivers

Correct Answer: 2

Explanation:

Physical obstacles should be identified before finalizing access-point locations because walls, equipment, shelving, machinery, glass, and structural elements can alter RF propagation. Their location and composition may cause attenuation, reflection, shadowing, or unexpected coverage patterns. A reliable design therefore considers the physical environment before determining where radios and antennas should be installed. User email formats, database indexes, and printer drivers have no direct relationship to RF propagation. Understanding physical constraints early can also prevent costly relocation work after installation.

Question 63.

Which WLAN requirement is directly related to application behavior?

1. Ceiling color
2. Rack labeling
3. Transaction volume
4. Patch-panel type

Correct Answer: 3

Explanation:

Transaction volume describes how frequently an application exchanges information over the network and can significantly influence wireless capacity requirements. Applications with frequent transactions may generate substantial airtime demand even when individual packets are relatively small. Designers should understand application behavior, expected concurrent users, traffic patterns, and performance expectations when developing the WLAN design. Ceiling color, rack labeling, and patch-panel type are physical or infrastructure details that do not directly describe application traffic requirements. Application analysis is therefore an important part of capacity-oriented wireless planning.

Question 64.

Which document helps communicate wireless design assumptions?

1. Cable inventory
2. User directory
3. Patch schedule
4. Design specification

Correct Answer: 4

Explanation:

A design specification documents important assumptions, requirements, decisions, constraints, and technical characteristics used to develop the WLAN. It can describe expected coverage, capacity objectives, RF thresholds, antenna choices, channel strategy, mounting considerations, and validation criteria. Maintaining these details helps implementation and testing teams understand why specific design decisions were made. Cable inventories, user directories, and patch schedules serve other operational purposes. A well-maintained design specification also provides a useful reference when the physical environment or business requirements change later.

Question 65.

What does an RF propagation model attempt to predict?

1. Signal behavior
2. User permissions
3. Switch licensing
4. DNS availability

Correct Answer: 1

Explanation:

An RF propagation model attempts to predict how radio signals will behave throughout a physical environment. Modeling tools can estimate received signal levels, coverage boundaries, attenuation effects, and other characteristics using information such as floor plans, material properties, antenna patterns, and radio parameters. Predictive modeling allows designers to evaluate potential AP locations before installation. It is an estimate rather than a guarantee because real environments contain variables that may not be fully represented. User permissions, licensing, and DNS availability are outside the RF propagation model.

Question 66.

Which wireless design issue can result from poorly chosen antenna orientation?

1. Incorrect DNS resolution
2. Unintended coverage pattern
3. Duplicate IP allocation
4. Incorrect gateway selection

Correct Answer: 2

Explanation:

Antenna orientation directly affects the direction and shape of RF coverage. If an antenna is mounted or rotated incorrectly, its intended radiation pattern may not align with the required service area. This can create unexpected coverage gaps, excessive overlap, or signal leakage into areas where coverage was not planned. Antenna orientation should therefore be considered together with mounting position, antenna type, building structure, and client locations. DNS resolution, IP allocation, and gateway selection operate at logical networking layers and are not caused by antenna orientation.

Question 67.

What is the primary purpose of a wireless site survey kit?

1. Manage user accounts
2. Configure routing policies
3. Collect RF measurements
4. Create DNS zones

Correct Answer: 3

Explanation:

A wireless site survey kit provides the tools needed to collect information about the RF environment and validate WLAN conditions. Depending on the survey methodology, equipment may include compatible client devices, measurement software, spectrum-analysis capability, antennas, mounting accessories, and other field tools. Measurements can help evaluate signal strength, noise, channel conditions, coverage, and performance against design requirements. User-account management, routing policies, and DNS-zone creation are unrelated administrative functions. Survey equipment is primarily used to observe and document actual wireless conditions.

Question 68.

Which design choice can reduce unnecessary RF leakage?

1. Proper cell sizing
2. Larger DHCP ranges
3. Longer passwords
4. More DNS servers

Correct Answer: 1

Explanation:

Proper cell sizing can reduce unnecessary RF leakage by limiting wireless coverage to the areas where service is actually required. Excessively large cells can extend RF energy beyond the intended service boundary and may increase channel reuse distances or expose neighboring areas to unnecessary transmissions. Cell sizing should account for client capabilities, coverage requirements, transmit power, antenna characteristics, and application needs. DHCP ranges, password lengths, and DNS-server quantities do not directly control the physical extent of RF propagation.

Question 69.

What should be documented for each access-point installation?

1. User password
2. Mounting location
3. Browser history
4. Application source code

Correct Answer: 2

Explanation:

The mounting location of each access point should be documented so that the physical deployment can be identified, maintained, and compared with the original design. Documentation may include floor, room, mounting position, antenna type, orientation, device identifier, and other installation details. Accurate records make troubleshooting, replacement, future surveys, and infrastructure changes easier. User passwords, browser history, and application source code are unrelated to documenting the physical WLAN installation. Good documentation also helps identify discrepancies between planned and installed AP locations.

Question 70.

Which RF issue is commonly associated with adjacent-channel interference?

1. Overlapping frequencies
2. Duplicate hostnames
3. Incorrect subnet masks
4. Excessive storage

Correct Answer: 1

Explanation:

Adjacent-channel interference occurs when transmissions on nearby channels overlap in frequency sufficiently to interfere with one another. This can happen when channel planning uses inappropriate channel combinations or when wide channels create excessive spectral overlap. The issue is especially important in environments where multiple WLANs operate close together. Designers should evaluate available channels, regulatory constraints, channel widths, and neighboring RF activity when developing a channel plan. Hostnames, subnet masks, and storage capacity do not create adjacent-channel RF interference.

Question 71.

What does a link budget estimate?

1. Total RF gain and loss
2. Number of VLANs
3. User authentication time
4. Database response rate

Correct Answer: 1

Explanation:

A link budget accounts for the gains and losses affecting a radio link between transmitter and receiver. Typical considerations include transmit power, antenna gain, cable or connector losses, free-space path loss, and other attenuation factors. The resulting estimate helps determine whether sufficient signal should reach the receiving device under the assumed conditions. Link-budget analysis is particularly valuable for directional or outdoor wireless links, although its principles also support general RF design. VLAN count, authentication time, and database response rate are not components of an RF link budget.

Question 72.

Which parameter indicates the frequency range an antenna is designed to support?

1. Beamwidth
2. Frequency range
3. Polarization
4. Front-to-back ratio

Correct Answer: 2

Explanation:

An antenna’s frequency range identifies the frequencies over which the antenna is designed to operate effectively. Antenna performance characteristics such as impedance, gain, and radiation pattern can vary across that range. Selecting an antenna with a suitable frequency range is necessary to ensure compatibility with the WLAN bands and channels being deployed. Beamwidth describes angular coverage, polarization describes field orientation, and front-to-back ratio compares radiation in different directions. Frequency compatibility should therefore be checked before finalizing an antenna selection.

Question 73.

What can excessive multipath cause at the receiver?

1. Signal variation
2. Larger IP space
3. Faster DNS queries
4. More switch ports

Correct Answer: 1

Explanation:

Excessive multipath can cause rapid variations in the received signal because multiple versions of the same transmission arrive through different paths and phases. Depending on their interaction, those signals may reinforce or cancel one another. Modern WLAN technologies use techniques such as MIMO and advanced signal processing to operate effectively in multipath environments, but severe conditions can still affect performance. Signal variation should therefore be considered during wireless surveys and troubleshooting. IP addressing, DNS processing, and switch-port availability do not explain this RF behavior.

Question 74.

Which physical measurement is useful when modeling a multi-floor WLAN?

1. Building height
2. Password age
3. VLAN count
4. DNS cache duration

Correct Answer: 1

Explanation:

Building height is an important physical measurement when modeling a multi-floor WLAN because vertical separation influences RF propagation between floors. Floor construction, ceiling materials, shafts, stairwells, and other structural features can also affect how much signal travels vertically. A realistic model should represent each relevant floor and account for differences in construction. Password age, VLAN count, and DNS cache duration are unrelated to the physical propagation characteristics between floors. Accurate architectural information therefore improves the reliability of multi-floor WLAN planning.

Question 75.

What is the purpose of an antenna’s front-to-back ratio?

1. Compare forward and rear radiation
2. Measure client throughput
3. Calculate IP capacity
4. Determine authentication speed

Correct Answer: 1

Explanation:

The front-to-back ratio compares the radiation level in the antenna’s primary forward direction with the radiation level toward its rear. This characteristic is useful when evaluating directional antennas because it indicates how effectively the antenna suppresses energy behind the main direction. A higher ratio generally represents stronger rejection of rearward radiation relative to the forward direction. Client throughput, IP capacity, and authentication speed are unrelated to this antenna specification. Understanding front-to-back behavior can help designers control unwanted RF coverage in targeted deployments.

Question 76.

Which design method uses measured data to refine a WLAN model?

1. Post-survey calibration
2. Password rotation
3. DNS replication
4. Route aggregation

Correct Answer: 1

Explanation:

Post-survey calibration uses measurements collected from the actual environment to improve the accuracy of a wireless model. Real-world data can reveal differences between predicted and observed attenuation, coverage, or propagation behavior. Adjusting model assumptions using these measurements can make subsequent planning more representative of the building. This process is particularly valuable when the same construction type or facility will support future wireless designs. Password rotation, DNS replication, and route aggregation are unrelated network operations and do not refine RF propagation models.

Question 77.

Which client characteristic should be included in capacity planning?

1. Supported PHY capabilities
2. Keyboard language
3. Screen resolution
4. Battery brand

Correct Answer: 1

Explanation:

Supported PHY capabilities are relevant to capacity planning because clients may differ in supported bands, channel widths, spatial streams, modulation schemes, and wireless standards. These differences can affect the rates at which devices transmit and the amount of airtime they consume. A population containing many legacy or lower-capability clients may therefore behave differently from one dominated by modern devices. Keyboard language, screen resolution, and battery brand do not directly determine RF capacity requirements. Client capability analysis helps designers build a more realistic performance model.

Question 78.

What should be evaluated when designing WLAN coverage across elevators?

1. Shaft attenuation
2. Email routing
3. User roles
4. Database size

Correct Answer: 1

Explanation:

Elevator shafts can create significant RF attenuation and unusual propagation conditions because their construction may include metal and other dense materials. Designers should evaluate whether wireless service is actually required inside elevator areas and, if so, determine how the shaft construction affects signal propagation. Vertical movement and changing RF conditions can also influence client connectivity. Email routing, user roles, and database size do not describe the physical RF challenge. Elevator areas should therefore be considered explicitly rather than assuming ordinary floor coverage will extend through the shaft.

Question 79.

Which factor can affect the accuracy of a predictive survey?

1. Incorrect floor-plan scale
2. Username length
3. Printer queue depth
4. Application icon size

Correct Answer: 1

Explanation:

An incorrect floor-plan scale can reduce predictive-survey accuracy because distances, wall locations, access-point spacing, and modeled propagation paths depend on the physical dimensions represented in the plan. If the scale is wrong, predicted coverage boundaries may not correspond to actual distances in the building. Other important factors include inaccurate material definitions, incorrect antenna models, unexpected obstructions, and environmental changes. Username length, printer queue depth, and application icon size have no meaningful effect on RF prediction accuracy.

Question 80.

Which approach best supports repeatable wireless validation?

1. Defined test criteria
2. Random walking paths
3. Unrecorded measurements
4. Changing thresholds

Correct Answer: 1

Explanation:

Defined test criteria make wireless validation repeatable because technicians can use consistent measurements, locations, thresholds, and procedures when evaluating the WLAN. A documented methodology allows results from different areas, deployment phases, or survey dates to be compared meaningfully. Random walking paths, unrecorded measurements, and changing thresholds can make results difficult to interpret or reproduce. Validation criteria should be based on the original WLAN requirements and should cover the performance characteristics that matter to the intended applications and users.