Explanation:

Why A is Correct?

Cisco Workgroup Bridges (WGBs) support a maximum of 20 wired clients when operating in Universal WGB mode (the only mode that allows both wired and wireless clients).

The spare radio (typically the 5 GHz radio) connects wireless clients, while the primary radio (2.4 GHz or 5 GHz) connects to the upstream AP.

Reference: Cisco Workgroup Bridge Configuration Guide.

Why Other Options Are Incorrect?

B. 25 / C. 30 / D. 35: Exceed Cisco’s documented limit for wired clients on a WGB.

Key Notes:

Universal WGB Mode: Required for both wired and wireless clients.

Wired Client Limit: Hard-capped at 20 due to performance and MAC address table constraints.

Reference:

Cisco Aironet 3800/2800 Series WGB Datasheet: Confirms the 20-client limit.

Final Note:

A (20) is the only valid answer. Options B/C/D are unsupported. Always verify WGB mode and firmware versio

Explanation:

Why B is Correct?

Office cubicle environments are characterized by absorption due to:

Partition walls (fabric, drywall, glass).

Furniture (chairs, desks, cabinets).

These materials absorb RF signals, reducing signal strength and coverage range.

Reference: CWNP RF Propagation Basics.

Why Other Options Are Less Relevant?

A. Reflection: Occurs with hard surfaces (e.g., concrete, metal) but is secondary in cubicle-heavy offices

C. Noise: Caused by interference (e.g., microwaves, Bluetooth) but is not a propagation attenuation factor.

D. Refraction: Bending of signals through mediums (e.g., glass)—rarely a primary concern in cubicles.

Key Attenuation Factors in Cubicles:

Partition walls: ~3–6 dB loss per wall.

Human presence: ~3 dB absorption per person.

Reference:

Cisco Wireless Design Guide: Recommends higher AP density for cubicle environments.

Final Note:

B (absorption) is the dominant factor. Options A/C/D are either secondary or unrelated. Always conduct a site survey to measure actual attenuation.n.

Explanation:

Why D is Correct?

A comprehensive wireless network supporting data, voice, and location services requires both indoor and outdoor AP placement to ensure:

Seamless coverage: Voice and data require consistent signal strength indoors (e.g., offices, hallways) and outdoors (e.g., courtyards, parking lots).

Location accuracy: Indoor/outdoor APs enable triangulation for asset tracking (e.g., RFID, Wi-Fi tags).

Reference: Cisco High-Density Wireless Design Guide.

Why Other Options Are Incorrect?

A. Corner only / B. Perimeter and corner / C. Perimeter only: These are partial deployments that miss critical areas (e.g., central indoor spaces, outdoor zones), degrading voice/location services.

Key Design Principles:

Indoor APs: High-density placement for cubicles, meeting rooms.

Outdoor APs: Cover open areas, ensuring mobility for voice/LBS.

Location Services: Use RF fingerprinting (indoor) and GPS/Wi-Fi hybrid (outdoor).

Reference:

CWNP Voice over Wi-Fi (VoWLAN) Guidelines: Recommends overlapping indoor/outdoor coverage for roaming.

Final Note:

D (indoor and outdoor) is the only holistic approach. Options A/B/C create coverage gaps. Always align AP placement with use-case requirements.

Explanation:

Why A is Correct?

QoS (Quality of Service) is critical for cloud-based real-time communication (e.g., VoIP, video conferencing) and email synchronization because it:

Prioritizes latency-sensitive traffic (e.g., voice/video packets over bulk data).

Minimizes jitter and packet loss, ensuring smooth user experience.

Without QoS, cloud applications suffer from lag, dropped calls, or delays.

Reference: Cisco Wireless QoS Design Guide.

Why Other Options Are Secondary?

B. Radio management: Optimizes RF performance but doesn’t prioritize traffic.

C. Interference mitigation: Reduces noise but doesn’t address application latency.

D. Fast secure roaming: Improves AP-to-AP handoffs but doesn’t prioritize cloud traffic.

Key QoS Configurations:

WMM (Wi-Fi Multimedia): Enable on WLANs for 802.11e prioritization.

DSCP Marking: Tag traffic at the AP/controller (e.g., EF for voice).

Bandwidth Reservation: Guarantee minimum bandwidth for real-time apps.

Reference:

IEEE 802.11e (WMM Standard): Defines QoS for Wi-Fi.

Final Note:

A (QoS) is mandatory for cloud apps. Options B/C/D are important but don’t directly improve real-time performance. Always test with traffic profiling tools.

Explanation:

Why A is Correct?

The Cisco autonomous AP can be configured as a Workgroup Bridge (WGB) to connect wired devices to the non-Cisco WLAN.

However, the 12-port switch alone cannot provide IP routing/NAT to share the WLAN’s internet connection with multiple wired clients.

A router is needed to: Assign local IP addresses (DHCP).

Route traffic between the WGB-connected switch and the WLAN.

Reference: Cisco Autonomous AP Workgroup Bridge Configuration.

Why Other Options Are Incorrect?

B. Transparent firewall: Filters traffic but doesn’t provide routing/DHCP.

C. Hub: Obsolete; cannot manage traffic or IP addressing.

D. Wireless controller: Unnecessary—autonomous APs don’t require a controller.

Setup Steps:

Configure the AP as a Universal WGB (supports wired clients).

Connect the switch to the WGB’s Ethernet port.

Connect the router to the switch to handle DHCP/routing.

Reference:

Cisco WGB Deployment Guide: Recommends a router for multi-client internet sharing.

Final Note:

A (router) is the only device enabling full connectivity. Options B/C/D lack critical routing functionality. Always test client connectivity post-configuration.

Explanation:

Why D, E, and F are Correct?

D (RSSI above threshold):

Client Band Select steers clients to 5 GHz only if the 5 GHz signal is strong enough (typically > RSSI threshold, e.g., -70 dBm).

E (Dual-band client):

Clients must support 5 GHz (802.11a/n/ac/ax) to connect to it. Single-band (2.4 GHz-only) devices cannot use 5 GHz.

F (802.11a enabled):

The WLAN must advertise 5 GHz support (via 802.11a/n/ac/ax) for clients to associate.

Why Other Options Are Incorrect?

A (Channel bonding): Affects throughput but not band steering.

B (Co-channel interference): Impacts performance but doesn’t prevent 5 GHz use.

C (UNII-2 extended channels): Optional for 5 GHz; clients can use other 5 GHz channels (e.g., UNII-1/3).

Key Band Select Requirements:

RSSI Threshold: Configured in WLC (e.g., config band select rssi-threshold -70).

Dual-Band Clients: Verify client capabilities (e.g., 802.11ac/ad).

5 GHz WLAN: Ensure 802.11a is enabled on the WLAN.

Reference:

Cisco Band Select Documentation.

Final Note:

D, E, and F are mandatory for 5 GHz band steering. Options A/B/C are unrelated or optional. Always verify client logs for band select failures.

Explanation:

Why A is Correct?

Anchor Priority determines the order in which guest clients are assigned to controllers in the DMZ.

Setting the primary anchor controller’s priority to 1 ensures:

Clients connect to the primary controller first.

If the primary fails, Auto-Anchor Mobility fails over to the secondary (lower priority, e.g., 2).

This aligns with the centralized deployment model and the customer’s requirement for high availability.

Reference: Cisco Auto-Anchor Mobility Configuration.

Why Other Options Are Incorrect?

B. Secondary priority to 1: Would reverse the failover logic (clients prefer the secondary).

C/D. ECMP (Equal-Cost Multi-Path): Irrelevant—Auto-Anchor uses priority, not routing metrics.

Reference:

Cisco Guest Access Design Guide: Recommends priority-based anchor failover.

Final Note:

A is the only correct method. Options B/C/D misconfigure the failover logic. Always test failover scenarios post-deployment.

Explanation:

Why C is Correct?

The backup WLC has only 10 AP licenses, but 7 APs are set to critical priority and 5 to high priority.

During failover, critical APs take precedence, but if the backup WLC’s license limit (10) is exceeded by critical APs (7) + high-priority APs (5), some critical APs will fail to connect.

Oversubscription occurs because the backup WLC cannot support all 12 APs (7 critical + 5 high).

Reference: Cisco WLC AP Failover Priority Guide.

Why Other Options Are Incorrect?

A. High-priority oversubscription: Not the issue—critical APs take precedence.

B/D. network ap-priority: This command enables/disables priority-based failover but doesn’t resolve license oversubscription.

Key Fixes:

Increase backup WLC licenses to cover all critical + high-priority APs (≥12).

Adjust AP priorities: Reduce critical/high-priority APs to fit the 10-license limit.

Reference:

Cisco High Availability Best Practices: Recommends matching backup licenses to primary AP counts.

Final Note:

C (oversubscription) is the root cause. Options A/B/D misdiagnose the issue. Always audit licenses against failover requirements.

Explanation:

Why D is Correct?

Catalyst 9300X-48HX switches support PoE+ (30W per port) and UPoE (60W per port).

The Cisco 9166 AP requires PoE+ (30W) for full functionality (dual-band, mGig).

A stack of two 9300X-48HX switches has a total PoE budget (e.g., 1.8kW per switch).

To avoid oversubscribing the PoE budget, the engineer must:

Distribute APs evenly across both switches (half ports per switch).

Ensure the total power draw does not exceed the stack’s capacity.

Reference: Cisco 9300X PoE Budget Guide.

Why Other Options Are Incorrect?

A/B. All ports on one switch: Risks exceeding the PoE budget of a single switch.

C. All ports on both switches: Would oversubscribe power (e.g., 96 APs × 30W = 2.88kW > 3.6kW total budget).

Calculation Example:

Each 9300X-48HX provides ~1.8kW PoE.

Max APs per switch: 1800W / 30W = 60 APs (but only 48 ports exist).

Safe design: 24 APs per switch (48 total) to reserve power for other devices.

Reference:

Cisco 9166 AP Datasheet: Confirms 30W PoE+ requirement.

Final Note:

D (half ports per switch) balances power and functionality. Options A/B/C risk power failures. Always validate PoE budgets before deployment.

Explanation:

Why B and C are Correct?

B (Number of wireless devices):

Critical for capacity planning (AP density, channel allocation) to support data, voice, video, and location tracking.

Determines bandwidth requirements (e.g., 50 devices vs. 500 per branch).

C (Type of site):

Main office vs. branch offices have different coverage needs (e.g., high-density cubicles vs. warehouse shelves).

Impacts AP placement, antenna selection, and RF design.

Reference: Cisco Wireless Design Best Practices.

Why Other Options Are Incorrect?

A (Security policy for building access): Relevant for authentication (e.g., 802.1X) but not RF/network design.

D (Power sockets in IT room): Important for deployment logistics but not a network requirement.

E (Business type): Too vague—doesn’t directly impact technical design.

Key Design Considerations:

Device Count (B):

Calculate per-AP client limits (e.g., 25–30 devices per AP for voice/video).

Site Type (C):

Office: High-density APs with omnidirectional antennas.

Warehouse: Directional antennas for long-range coverage.

Reference:

CWNP Wireless Network Design Principles: Emphasizes capacity and site-specific planning.

Final Note:

B and C are the only factors directly impacting network requirements. Options A/D/E are secondary or unrelated. Always conduct a site survey to validate assumptions.

Explanation:

Why B is Correct?

MetaGeek Chanalyzer is a spectrum analysis tool that detects RF interference, including non-Wi-Fi signals like:

Jammers: Emit continuous noise across Wi-Fi bands (2.4 GHz/5 GHz) to disrupt communications.

Microwaves, Bluetooth, Zigbee, cordless phones: Also detectable but not listed in the options.

Jammers are explicitly identifiable due to their broad-spectrum noise signature.

Reference: MetaGeek Chanalyzer Documentation.

Why Other Options Are Incorrect?

A. PDAs / C. Smartphones / D. Printers: These are Wi-Fi devices (not non-Wi-Fi interferers) and appear as normal clients in Wi-Fi scans, not spectrum analysis.

How Chanalyzer Identifies Jammers:

Spectrum Graph: Shows flat, high-amplitude noise (jammers blanket frequencies).

Waterfall View: Reveals continuous interference patterns.

Reference:

CWNP Spectrum Analysis Guide: Highlights jammers as a key non-Wi-Fi interferer.

Final Note:

B (jammers) is the only non-Wi-Fi option. Options A/C/D are Wi-Fi devices. Always correlate spectrum data with Wi-Fi scans for accurate diagnosis.

Explanation:

Why B is Correct?

Aesthetic enclosures (e.g., Cisco’s InvisiMesh or custom decorative covers) are designed to blend APs into ceilings, walls, or furniture while maintaining RF performance.

This addresses the customer’s primary concern for aesthetics without compromising functionality.

Reference: Cisco Aironet Design Guides.

Why Other Options Are Incorrect?

A. Painting APs: Void warranties, block vents/LEDs, and may violate fire codes.

C. AIR-AP-BRACKET-1: Expands mounting options but doesn’t hide APs.

D. Eco-friendly cabling: Irrelevant—cabling is typically hidden; this doesn’t address visible APs.

Key Aesthetic Solutions:

Ceiling tiles with integrated AP mounts.

Custom enclosures matching décor (e.g., faux smoke detectors).

Reference:

CWNP Deployment Best Practices: Recommends enclosures for aesthetic-sensitive environments.

Final Note:

B is the only professional solution. Options A/C/D are either unsafe or ineffective. Always verify enclosure RF transparency with testing.