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| Section | Weight | Objectives |
|---|---|---|
| Mobility | 25% | - Validate mobility tunneling - Site Tags - Optimize client roaming - Design mobility groups |
| Wired and Wireless Infrastructure | 30% | - Design wireless bridging (mesh) - Physical infrastructure requirements - Design high-density wireless networks - Logical infrastructure requirements - Design for data, voice, video, location - Design radio management |
| WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
| Wireless Site Survey | 25% | - Material attenuation and its design effects - Pre-deployment site survey - Post-deployment site survey - Layer 1 site survey analysis - Planning tools and network metrics evaluation - Predictive site survey - Collect design requirements and evaluate constraints |
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NEW QUESTION # 59
A university is deploying a wireless lecture-capture application that streams video to many clients simultaneously. Which controller design should the engineer specify to make efficient use of the wired network?
Answer: C
Explanation:
In multicast-unicast mode the controller replicates each multicast packet once for every joined AP and sends the copies as unicast CAPWAP frames, which consumes controller CPU and multiplies traffic across the wired uplink in direct proportion to the AP count - this does not scale for a campus-wide video application. In multicast-multicast mode the controller sends a single copy of the packet to a configured AP multicast group address, and the wired network's multicast infrastructure replicates it only where needed, delivering it to all subscribed APs efficiently. This requires that multicast routing (PIM) be enabled on the wired infrastructure between the controller and the APs, and that IGMP snooping be configured appropriately on the access switches.
Enabling broadcast forwarding floods traffic without any subscription control and creates its own scaling problem, and disabling multicast entirely returns the design to per-client unicast replication over the air.
NEW QUESTION # 60
A network engineer is configuring high availability on an access point. What is the maximum number of controllers that can be configured?
Answer: C
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. Reference: WLSD Study Guide - AP High Availability Configuration, Primary/Secondary
/Tertiary Controller Assignment, AP Failover Design.
NEW QUESTION # 61
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: C
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. Once RF coverage requirements are established, aesthetic concerns (Option A) can guide the choice of AP form factor, enclosures, or cabling routes. Cell overlap (Option C) is derived from coverage calculations. RF interference (Option D) analysis follows after RF coverage baseline is established.
Reference: WLSD Study Guide - Site Survey Methodology, AP Placement Priority, Special Environment Wireless Design.
NEW QUESTION # 62
A consulting engineer for a copper mine is trying to extend the network connectivity of autonomous trucks via Cisco IW3702 APs. The WGB design requirements include: latency- sensitive application (truck slows at 10 sec, stops at 20 sec of connection loss), aggressive scanning and roaming, enterprise-grade security without certificates on each AP, multiple clients in different VLANs on the WGB, and channel scan parameters restricted to only channels in the truck path. Which design approach meets the requirements?
Answer: A
Explanation:
This WGB (Workgroup Bridge) design scenario requires satisfying multiple simultaneous constraints. EAP-FAST (Flexible Authentication via Secure Tunneling) is the correct authentication protocol because it provides enterprise-grade 802.1X security using protected access credentials (PAC) without requiring a certificate to be installed on each AP or WGB device
-- directly satisfying the enterprise-grade security without certificates requirement. EAP-TLS (Options B and D) requires client certificates on every authenticating device, which is explicitly excluded. Mobile station mode is required rather than static mode (Options C and D) because mobile station mode enables the WGB to aggressively scan and roam to optimal mesh neighbors dynamically, evaluating neighbor signal quality and switching to better RAPs/MAPs as the truck moves along its path. Static mode fixes the WGB to a specific channel or AP, preventing the aggressive scanning and roaming required for the latency-sensitive application. The dot1q- capable switch connection supports multiple clients in different VLANs via 802.1Q VLAN tagging between the WGB and the truck's local network switch.
NEW QUESTION # 63
During a client roaming event, which device is responsible for communicating the new Layer 2 EID mapping of a wireless supplicant to the fabric domain?
Answer: D
Explanation:
During a client roaming event in a Cisco SD-Access fabric deployment, the Wireless LAN Controller (WLC) is responsible for communicating the new Layer 2 Endpoint ID (EID) mapping of a wireless supplicant to the fabric domain. In the SD-Access architecture, the WLC acts as a mobility orchestrator and serves as the interface between the wireless domain and the wired fabric. When a client roams from one AP to another, the WLC detects the roaming event and updates the fabric control plane with the new EID-to-RLOC (Routing Locator) mapping by notifying the fabric control plane node (CP). This ensures that the fabric knows the client ' s new location and can route traffic correctly without interruption. The Border Node (BN) handles traffic between the fabric and external networks. CP1 and CP2 are control plane nodes that maintain the mapping database but receive EID update notifications from the WLC - they do not initiate the EID mapping communication themselves. Reference: WLSD Study Guide - SD-Access Wireless Architecture, Client Roaming in Fabric Deployments, EID Mapping and Control Plane Notifications.
NEW QUESTION # 64
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