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Question 361.

What is the main purpose of a WLAN design specification?

1. Define measurable deployment requirements
2. Select user passwords
3. Replace RF measurements
4. Configure browser settings

Correct Answer: 1

Explanation:

A WLAN design specification translates business and technical requirements into measurable characteristics for the wireless deployment. It can define coverage objectives, capacity expectations, supported applications, security requirements, client types, availability targets, and environmental constraints. These requirements provide a reference for design decisions and later validation. A design specification does not replace RF measurements or determine individual user passwords. Instead, it establishes what the completed WLAN must accomplish. Clear requirements also help prevent ambiguous acceptance testing because the installation team can compare measured results against predefined technical objectives.

Question 362.

Why should application requirements be included in WLAN planning?

1. They determine cable colors
2. They establish service performance needs
3. They select antenna connectors
4. They control rack height

Correct Answer: 2

Explanation:

Different applications place different demands on a wireless network. Voice, video, transactional systems, scanning devices, and ordinary web traffic can have different requirements for latency, jitter, packet loss, throughput, and availability. Including application requirements during planning allows the designer to establish appropriate RF and network objectives rather than treating every client workload identically. Cable colors, antenna connectors, and rack height do not define application performance. A useful design process maps important applications to measurable network requirements and then validates those requirements through representative testing after deployment.

Question 363.

Which metric is especially relevant to interactive voice quality?

1. DHCP lease count
2. Antenna aperture
3. Jitter
4. Cable jacket thickness

Correct Answer: 3

Explanation:

Jitter represents variation in packet arrival timing and can negatively affect real-time applications such as voice when it becomes excessive. Voice traffic depends on reasonably consistent packet delivery because large timing variations can contribute to gaps, buffering, or degraded call quality. Other metrics such as latency and packet loss are also important, but jitter specifically addresses timing variation. DHCP lease counts, antenna aperture, and cable jacket thickness do not directly measure voice packet timing. WLAN voice designs should therefore establish appropriate jitter objectives and validate them using realistic traffic and representative client devices.

Question 364.

What can excessive packet loss do to a real-time WLAN application?

1. Improve roaming speed
2. Reduce antenna attenuation
3. Increase channel availability
4. Degrade application quality

Correct Answer: 4

Explanation:

Packet loss can significantly affect applications that require timely and reliable delivery, especially voice, video, and interactive services. Lost packets may require retransmission or may simply result in missing portions of an application stream. In real-time communication, recovery opportunities are limited, so noticeable loss can produce interruptions or degraded media quality. Packet loss can originate from RF interference, weak signal conditions, congestion, wired bottlenecks, or other network problems. Designers should measure loss under representative conditions and determine whether the observed level satisfies the application’s documented performance requirements.

Question 365.

What does a WLAN capacity plan primarily estimate?

1. Required network resources
2. Antenna connector torque
3. Certificate expiration dates
4. Building paint coverage

Correct Answer: 2

Explanation:

A WLAN capacity plan estimates the resources needed to support the expected client population and traffic demand. It can consider concurrent users, application mix, airtime utilization, throughput requirements, channel availability, AP capabilities, and wired backhaul capacity. Capacity planning differs from simply determining where an AP can provide signal coverage. Connector torque, certificate expiration, and building paint coverage may matter elsewhere in a project but do not establish WLAN capacity requirements. A strong capacity plan also considers peak demand rather than relying only on average client counts.

Question 366.

Why should a dense WLAN account for concurrent clients rather than total registered devices?

1. Registered devices always transmit simultaneously
2. Concurrent clients determine active demand
3. Total devices define antenna gain
4. Registered devices eliminate contention

Correct Answer: 2

Explanation:

The number of devices associated with or registered to a WLAN is not necessarily the same as the number actively using the network at a particular time. Capacity requirements are strongly influenced by concurrent clients and their traffic patterns because simultaneous transmissions create actual airtime and infrastructure demand. A venue may have thousands of registered devices but only a portion actively transmitting at once. Conversely, a smaller group can create substantial demand if applications are bandwidth intensive. Designers should therefore model realistic concurrency, application behavior, and peak usage when sizing WLAN resources.

Question 367.

What can an undersized DHCP scope cause in a busy WLAN?

1. Address exhaustion
2. Increased antenna gain
3. Lower channel frequency
4. Stronger certificate encryption

Correct Answer: 1

Explanation:

A DHCP scope contains the addresses available for clients on a particular subnet. If the scope is too small for the expected client population, new devices may fail to obtain an address when all available leases are consumed. This can appear to users as a connectivity problem even though the RF environment is functioning normally. Address planning should account for expected concurrent clients, lease duration, guest-device turnover, and possible growth. Antenna gain, channel frequency, and certificate encryption are unrelated to DHCP address availability and should not be used as remedies for scope exhaustion.

Question 368.

What is a key reason to avoid excessive VLAN-per-SSID designs?

1. They always improve roaming
2. They increase RF gain
3. They can increase network complexity
4. They eliminate authentication traffic

Correct Answer: 3

Explanation:

Creating a separate VLAN and SSID for every user category can produce unnecessary configuration and operational complexity. Large numbers of VLANs and SSIDs may affect switch configuration, routing, security policy, management, and wireless airtime. Segmentation should therefore be based on genuine policy or service requirements rather than arbitrary grouping. Excessive SSIDs do not improve RF gain or eliminate authentication traffic, and they do not inherently improve roaming. A scalable design typically minimizes unnecessary network constructs while still providing the isolation and access controls required by the organization’s security architecture.

Question 369.

What is the main purpose of client isolation on a guest WLAN?

1. Prevent selected peer communication
2. Increase AP antenna height
3. Extend RADIUS certificates
4. Reduce cable attenuation

Correct Answer: 1

Explanation:

Client isolation can prevent wireless guests from communicating directly with other guest devices on the same WLAN. This reduces opportunities for one guest device to probe or directly access another guest device and can support a broader guest-security strategy. Isolation policies vary by platform, so the designer should verify exactly which traffic types are blocked and which infrastructure services remain reachable. Client isolation does not increase antenna height, extend certificates, or reduce cable attenuation. Guest WLAN design should combine isolation with segmentation, firewall policy, authentication controls, and appropriate Internet-access restrictions.

Question 370.

What does a WLAN availability requirement typically describe?

1. Desired service uptime
2. Antenna cable diameter
3. Number of SSID characters
4. Survey laptop battery size

Correct Answer: 4

Explanation:

A WLAN availability requirement defines how consistently the wireless service should remain operational and accessible. Availability objectives may be expressed through uptime targets, redundancy expectations, maintenance policies, or acceptable service interruption periods. These requirements influence architecture decisions such as controller redundancy, power resilience, wired-path redundancy, and monitoring. Cable diameter, SSID character length, and survey-device battery capacity are not measures of service availability. Establishing availability expectations early allows the designer to determine which infrastructure components require redundancy and how failover behavior should be validated during acceptance testing.

Question 371.

What does an N+1 controller architecture provide?

1. One additional capacity unit
2. A separate encryption algorithm
3. A dedicated RF channel
4. Automatic antenna alignment

Correct Answer: 1

Explanation:

An N+1 architecture provides one additional controller resource beyond the number required for normal operation. The additional unit can provide capacity for failover when another controller becomes unavailable, depending on the platform’s redundancy model and configuration. This arrangement can improve resilience without requiring a complete duplicate of the entire controller environment. It does not create a dedicated RF channel, alter encryption algorithms, or align antennas. Designers should verify actual vendor failover behavior, client-session handling, licensing, capacity during failure conditions, and recovery procedures rather than assuming that every N+1 implementation behaves identically.

Question 372.

What is a benefit of stateful WLAN controller failover?

1. Preserving operational session information
2. Increasing antenna polarization
3. Expanding DHCP packet size
4. Changing cable categories

Correct Answer: 2

Explanation:

Stateful failover is designed to preserve relevant operational state between redundant infrastructure components so that a failure can occur with less disruption than a completely independent restart. Depending on the vendor implementation, state information can include client sessions, authentication context, or other controller data. This can reduce recovery impact during a controller failure. Stateful redundancy does not change antenna polarization, DHCP packet size, or cable category. A WLAN designer should verify exactly which state elements are synchronized and test failover under realistic client and traffic conditions before relying on the architecture for availability objectives.

Question 373.

What should controller sizing account for beyond simple AP count?

1. Client and traffic workload
2. Cable jacket color
3. Antenna mounting screws
4. Floor tile dimensions

Correct Answer: 1

Explanation:

Controller sizing should consider more than the number of access points. Depending on the architecture, relevant factors can include concurrent clients, aggregate throughput, tunnel traffic, security processing, roaming activity, application load, enabled features, and redundancy requirements. Two deployments with the same AP count can therefore require different controller resources if their client populations or traffic profiles differ substantially. Physical installation details such as cable jacket color, mounting screws, and floor tile dimensions do not determine controller processing requirements. Capacity should be evaluated under expected peak conditions and appropriate failure scenarios.

Question 374.

What is a primary purpose of CAPWAP control traffic?

1. Carry application payloads only
2. Manage AP communication
3. Increase radio sensitivity
4. Assign antenna polarization

Correct Answer: 4

Explanation:

CAPWAP provides standardized mechanisms for communication between access points and wireless LAN controllers. Its control channel carries management and control information used to establish and maintain the AP-controller relationship and coordinate operational functions. CAPWAP can also transport WLAN data depending on the deployment architecture, but control traffic specifically concerns management communication rather than ordinary application payload delivery. CAPWAP does not increase RF sensitivity or assign antenna polarization. Understanding the distinction between control and data paths is useful when troubleshooting controller connectivity, tunnel behavior, and wired-network requirements.

Question 375.

What is a consideration when CAPWAP data is centrally tunneled?

1. Tunnel overhead and bandwidth
2. Antenna connector color
3. Certificate font size
4. Survey map orientation

Correct Answer: 2

Explanation:

When WLAN data is centrally tunneled from access points toward a controller, the network must accommodate the resulting encapsulation overhead and aggregate traffic volume. This can affect bandwidth requirements, MTU planning, controller capacity, and switch uplink utilization. The designer should also consider latency and failure behavior along the tunnel path. Physical connector color, certificate formatting, and survey-map orientation do not determine tunnel capacity. A complete architecture review should identify where traffic enters and exits the tunnel and whether the selected wired infrastructure can sustain peak aggregate demand.

Question 376.

What is a benefit of local WLAN traffic switching?

1. It always removes encryption
2. It can keep data near the AP site
3. It eliminates all VLANs
4. It guarantees zero packet loss

Correct Answer: 3

Explanation:

Local traffic switching can allow client data to exit the WLAN infrastructure closer to the access point rather than requiring every packet to traverse a centralized controller tunnel. This can reduce unnecessary backhaul traffic and may improve scalability in distributed network environments. The exact behavior depends on the WLAN architecture and security policy. Local switching does not inherently remove encryption, eliminate VLANs, or guarantee zero packet loss. Designers should evaluate traffic paths, security enforcement points, routing, QoS, and failure behavior before selecting centralized or locally switched forwarding.

Question 377.

What should a wireless pilot include for interoperability validation?

1. Representative client devices
2. Only one operating system
3. Unused switch hardware
4. Disabled security settings

Correct Answer: 1

Explanation:

Interoperability testing should use representative client devices and software versions that reflect the expected production environment. Different operating systems, wireless chipsets, drivers, security configurations, and application workloads can behave differently even when they support the same WLAN standards. Testing only one client type may therefore miss important compatibility problems. Unused switch hardware and disabled security settings do not provide meaningful production validation. A pilot should include the client categories that matter to the deployment and should test authentication, association, roaming, application behavior, and performance under realistic operating conditions.

Question 378.

Why should a WLAN project maintain a corrective action log?

1. To record unresolved findings and actions
2. To increase AP transmit power
3. To replace the survey baseline
4. To select new SSID names

Correct Answer: 4

Explanation:

A corrective action log provides a structured record of problems discovered during surveys, testing, installation, or acceptance activities and documents how those findings are addressed. It can identify the issue, responsible party, required action, status, completion date, and verification result. This creates traceability between identified deficiencies and the final deployment state. Increasing transmit power or changing SSID names may occasionally be corrective actions, but they are not the purpose of the log itself. Maintaining this record helps prevent unresolved issues from being overlooked during project closure.

Question 379.

What should a WLAN design assumption document identify?

1. Conditions accepted as design inputs
2. Guaranteed future interference
3. Unknown client behavior as fact
4. Unverified regulatory permissions

Correct Answer: 3

Explanation:

Design assumptions identify conditions that the engineering process accepts as inputs when developing the WLAN solution. Examples can include expected client populations, application usage patterns, building characteristics, available wired services, or environmental conditions. Assumptions should be documented clearly so that later changes can be recognized and their effect evaluated. Unknown behavior should not be presented as established fact, and regulatory permissions should be verified rather than assumed. Good assumption documentation also identifies important dependencies and limitations so that stakeholders understand what conditions the design relies upon.

Question 380.

What is the purpose of documenting survey limitations?

1. Hide measurement errors
2. Clarify the scope of conclusions
3. Increase measured signal strength
4. Eliminate future surveys

Correct Answer: 2

Explanation:

Survey limitations explain conditions that may affect how the collected results should be interpreted. Examples can include inaccessible areas, temporary building conditions, unavailable client devices, restricted measurement locations, environmental changes, or equipment limitations. Clearly documenting these factors helps stakeholders understand what the survey does and does not demonstrate. Limitations should not be used to hide errors or artificially improve reported results. Nor do they eliminate the need for future validation. Transparent documentation allows later engineers to distinguish measured facts from assumptions and recognize areas where additional testing may be appropriate.