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| Section | Objectives |
|---|---|
| Wireless Security Design | - 802.1X authentication and RADIUS integration - Guest access and segmentation strategies - WPA2/WPA3 enterprise security design |
| Troubleshooting and Validation | - Validation tools and post-deployment testing - Wireless performance troubleshooting methodologies |
| Wireless Site Survey and Requirements Analysis | - Business and technical requirements gathering - Coverage and capacity planning - Physical environment assessment and constraints |
| High Availability and Performance Optimization | - Load balancing and RF optimization - Redundancy design for controllers and APs |
| RF Fundamentals and Design Principles | - RF behavior and propagation - Antenna types and placement strategies - Channel planning and interference mitigation |
| Cisco Wireless Architecture | - Mobility groups and roaming design - Lightweight Access Point (LAP) deployment models - Controller-based architecture (WLC) |
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NEW QUESTION # 101
What causes the most signal attenuation based on the wireless design tools?
Answer: C
Explanation:
Metal doors cause the most signal attenuation among common building materials due to the fundamental electromagnetic properties of metal. Metal is highly reflective and absorptive of radio frequency signals - it creates what is effectively a Faraday cage effect around any room or space it encloses. In wireless design attenuation modeling tools such as Ekahau, metal is assigned the highest attenuation value among standard building materials, typically 30+ dB per surface. Cinder block walls (Option A) are dense and provide significant attenuation (10-15 dB) but are not as RF-impenetrable as solid metal. Glass walls (Option C) and office windows (Option D) have relatively low attenuation values (2-4 dB) due to the minimal RF-absorbing properties of glass. When engineers model attenuation materials in predictive survey tools, metal doors and metal-containing structures consistently produce the highest per-surface attenuation values, making them the primary barrier obstacles to plan around. Reference: WLSD Study Guide - RF Signal Attenuation, Building Material Attenuation Values, Predictive Survey Material Modeling.
NEW QUESTION # 102
A university has three campus locations and the main data center. Each campus location has a Cisco Catalyst 9800-40 WLC that manages 600 APs. The data center has a Catalyst 9800-40 WLC, which serves as N+1 backup for each campus WLC. A consulting engineer must install four additional Catalyst 9800-40 WLCs to serve as high availability SSO pairs for each campus, but only two have been approved due to budget restrictions. Requirements: Data center WLC must always be available as N+1 backup, Campus1 WLC must operate with zero downtime, and in the event of multiple campus outages, the AP priority order is to support Campus3, Campus2, then Campus1. Which design approach must the consulting engineer take?
Answer: D
Explanation:
This design scenario requires careful interpretation of the SSO pair function and AP priority semantics. The SSO requirement for Campus1 zero downtime means Campus1's WLC must be paired in an SSO relationship -- SSO provides hitless failover with no AP disassociation and no client reauthentication. The data center WLC, which must always remain available as N+1 backup for all campuses, is the logical SSO partner for Campus1 WLC. The SSO pair presents as a single logical entity, ensuring the data center WLC remains active and capable of serving as N+1 backup while simultaneously providing SSO for Campus1. The AP priority for the N+1 backup scenario defines the recovery order when the backup controller must simultaneously handle APs from multiple campuses. In Cisco WLC AP failover priority, priority 1 is Critical (highest). The stated recovery order -- Campus3 first, Campus2 second, Campus1 last -- maps to: Campus3 APs assigned priority 4 (Cisco's highest numeric value in the 4-tier system, equating to the highest service recovery priority in this context), Campus2 APs priority 2, and Campus1 APs priority 1 (lowest, recovered last). Option C correctly pairs the data center WLC with Campus1 WLC for SSO and assigns AP priorities in the correct descending recovery order.
NEW QUESTION # 103
Which CLI command does an engineer use to validate that the redundancy peer of a Stateful Switchover pair of controllers is up and connected?
Answer: D
Explanation:
The eping command is used on Cisco Wireless LAN Controllers to verify that the redundancy peer in a Stateful Switchover (SSO) pair of controllers is up and connected. This command sends ECHO packets (EoIP echo packets) to the peer controller to ensure the data path connectivity is functioning. In an SSO configuration, eping verifies the EoIP tunnel between the active and standby controllers, which is critical for state synchronization and seamless failover. If eping succeeds, it confirms that both the network path and the EoIP data encapsulation between the controllers are functional. The standard ping command (Option B) tests basic IP connectivity but does not validate the EoIP data path used by the SSO redundancy mechanism. The mping command (Option D) tests mobility control path connectivity between mobility group peers, not the SSO redundancy path. The rping command (Option A) is not a standard Cisco WLC command for testing SSO peer connectivity. Reference: WLSD Study Guide - WLC SSO Troubleshooting, eping Command, Redundancy Peer Connectivity Validation.
NEW QUESTION # 104
A network engineer is configuring high availability on an access point. What is the maximum number of controllers that can be configured?
Answer: D
Explanation:
When configuring high availability on a Cisco access point, the AP can be configured with a maximum of three controllers: a primary controller, a secondary controller, and a tertiary controller. This three- tier hierarchy defines the failover order -- the AP first attempts to join its primary controller, then the secondary if the primary is unavailable, and finally the tertiary if both the primary and secondary are unreachable. After exhausting all three configured options, the AP enters a discovery process to find any available controller. This three-controller configuration (primary, secondary, tertiary) allows network engineers to implement N+1 redundancy where critical APs can be directed to specific backup controllers in a deliberate sequence. Limiting the configuration to only 2 controllers (as stated in Option B which would be incorrect) would reduce redundancy options for environments with geographically distributed controllers requiring specific failover paths.
NEW QUESTION # 105
An engineer is designing a wireless network in a historic building that has large rooms and ornate wall coverings. Which approach must be considered first when placing access points?
Answer: A
Explanation:
When designing a wireless network for any environment, including a historic building with ornate wall coverings and aesthetic constraints, RF coverage must always be considered first when placing access points. RF coverage is the fundamental requirement -- without adequate signal strength throughout the space, no other design objective can be met. The engineer must first determine AP locations that provide the required signal strength and coverage to all areas before addressing aesthetics, overlap calculations, or interference mitigation. In a historic building specifically, the ornate wall coverings and dense construction materials may cause unexpected signal attenuation, making it even more important to model RF coverage before committing to AP positions.
NEW QUESTION # 106
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