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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Wired and Wireless Infrastructure | 30% | - Logical infrastructure requirements - Design radio management - Design high-density wireless networks - Physical infrastructure requirements - Design for data, voice, video, location - Design wireless bridging (mesh) |
| Topic 2: Wireless Site Survey | 25% | - Material attenuation and its design effects - Planning tools and network metrics evaluation - Layer 1 site survey analysis - Collect design requirements and evaluate constraints - Predictive site survey - Pre-deployment site survey - Post-deployment site survey |
| Topic 3: Mobility | 25% | - Validate mobility tunneling - Design mobility groups - Site Tags - Optimize client roaming |
| Topic 4: WLAN High Availability | 20% | - Design controller high availability - Design AP high availability |
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38. Frage
A customer has a Cisco wireless network that supports VoWLAN services. The customer wants supported voice clients to receive roaming recommendations and suggestions from APs. This functionality must not impact non-VoWLAN clients. What should be enabled on the VoWLAN SSID?
Antwort: D
Begründung:
IEEE 802.11v BSS Transition Management is the standard that enables the network (via the AP) to actively provide roaming recommendations and suggestions to associated clients. When enabled on a SSID, the AP can send BSS Transition Management Request frames to clients, informing them of preferred target APs ranked by signal quality, load, and channel conditions. Critically, BSS Transition Management is a voluntary mechanism - clients that support 802.11v can act on the AP ' s recommendation, while clients that do not support 802.11v simply ignore the BSS Transition Request frames and continue operating normally. This selective applicability directly satisfies the requirement that non-VoWLAN clients must not be impacted.
802.11k (Option A) enables clients to build neighbor lists through measurement reports - this is a client- initiated process, not an AP-to-client recommendation. CCKM (Option B) is a Cisco proprietary fast roaming mechanism for legacy clients, unrelated to roaming guidance. 802.11r (Option D) accelerates the re- association handshake during roaming but does not provide proactive roaming recommendations. Reference:
WLSD Study Guide - VoWLAN Design, 802.11v BSS Transition Management, Roaming Optimization Protocols.
39. Frage
A customer has two Cisco wireless controllers named WLC-A and WLC-B. Each controller is in a different building on a campus. The WLCs have different Layer 3 interfaces and broadcast the same SSIDs from their respective APs. Users must remain connected to the same VLAN and maintain their IP addresses during roaming from the APs attached to WLC-A and WLC-B. Which action accomplishes the requirement?
Antwort: A
Begründung:
The requirement for users to retain their VLAN assignment and IP address when roaming between buildings managed by different WLCs is a Layer 3 roaming scenario. In Cisco ' s wireless architecture, IP address preservation across controller boundaries is achieved through inter-controller mobility - specifically the foreign-anchor mobility tunnel mechanism. When a client roams from Building A (WLC-A) to Building B (WLC-B), WLC-B becomes the foreign controller and WLC-A becomes the anchor controller. WLC-B tunnels the client ' s traffic back to WLC-A, allowing the client to retain its original IP address even while physically associated to an AP managed by WLC-B. This requires creating a mobility group between WLC-A and WLC-B with both controllers configured with the same mobility group name - the group name is the trust identifier that permits the mobility tunnel and anchor-foreign relationship to form. An SSO cluster (Option B) creates redundancy between two WLCs operating as one logical entity, not inter-building roaming between independent controllers. 802.11r (Option C) accelerates re-association but does not preserve IP addresses across different Layer 3 subnets. AP groups (Option D) control SSID and VLAN assignments but do not enable inter-controller IP preservation. Reference: WLSD Study Guide - Inter-Controller Mobility, Layer 3 Roaming, IP Address Preservation.
40. Frage
A university lecture hall has a Cisco wireless high-density network with this configuration: ?5 GHz only ?20-MHz channels ?UNII-1, UNII-2, and UNII-2E channels ?TPC minimum = 8 ?TPC maximum = 14 The lecture hall is 200 feet by 100 feet and has 16 Cisco APs that use directional antennas. Which feature must be included in the design to mitigate and reduce high-channel utilization from rogue APs?
Antwort: B
Begründung:
Receive Start of Packet (RxSOP) is a Cisco proprietary mechanism that defines the minimum received signal threshold at which an access point will acknowledge an 802.11 frame and begin processing it. In a high-density lecture hall environment with 16 APs and directional antennas on a constrained channel plan, rogue APs operating on the same or adjacent channels contribute directly to elevated channel utilization by causing unnecessary medium contention, virtual carrier sensing via NAV, and clear channel assessment deferral. By raising the RxSOP threshold on the legitimate APs, the engineer creates a higher signal floor requirement -- only signals above the configured RxSOP level are processed. Signals from distant rogue APs, arriving below this threshold, are silently discarded rather than processed, preventing them from consuming airtime through CCA deferral and NAV mechanisms.
41. Frage
A network engineer is preparing a predictive site survey for a new three-story office building before construction is complete. Which two inputs are required to produce an accurate predictive model? (Choose two.)
Antwort: A,B
Begründung:
A predictive survey builds an RF model mathematically rather than measuring live signal, so the accuracy of the output depends entirely on the accuracy of the model inputs. Scaled floor plans (Option B) are mandatory - the planning tool must know the true physical dimensions of the space to calculate free-space path loss and AP spacing. If the drawing scale is wrong, every calculated coverage cell is wrong. Wall and building material attenuation values (Option C) are the second required input, because RF propagation indoors is dominated by obstruction loss rather than free- space loss. Drywall, glass, concrete, brick, elevator shafts, and metal racking each attenuate differently, and these values must be applied to the walls drawn on the plan. Spectrum captures and association counts are impossible to collect in a building that has not been built, and AP serial numbers have no bearing on RF modeling.
42. Frage
A network engineer must review the design for a Cisco wireless deployment at a hospital. The deployment will have two Cisco 9800 WLCs configured with SSO, one Cisco 9800 WLC joined to the SSO controllers using a mobility tunnel, and one Cisco 9800 WLC that will be used as a service/dev controller and not joined using a mobility tunnel. Which high availability option must be incorporated in the design to ensure that APs choose the service/dev controller last when trying to associate?
Antwort: B
Begründung:
In Cisco ' s AP controller preference hierarchy, each AP can be configured with a primary, secondary, and tertiary controller designation. The AP will attempt to join controllers in this exact order: primary first, secondary second, and tertiary third. When no controllers from the preference list are available, the AP may fall back to any reachable controller through standard CAPWAP discovery. In this hospital deployment, the service/development controller must be the controller of last resort - it should only receive AP associations when all other options are exhausted. Configuring the service/dev controller as the tertiary controller in the APs ' preference configuration ensures exactly this behavior: APs will attempt the SSO pair (primary) first, then the third production WLC joined via mobility tunnel (secondary), and only then the service/dev controller (tertiary). This prevents development traffic from disrupting production service, and ensures production APs do not inadvertently join the service environment during partial outages. Configuring it as primary (Option A) or secondary (Option C) would allow APs to join the service controller before exhausting production options. AP failover priority (Option D) governs which APs are processed during controller recovery, not the controller preference order during join. Reference: WLSD Study Guide - AP Controller Preference Configuration, Primary/Secondary/Tertiary WLC Assignment, Hospital WLAN High Availability Design.
43. Frage
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Laut Umfragen haben die Cisco 300-110 Prüfung heutzutage hohe Konjunktur in IT-Zertifizierungen. Tatsächlich ist die 300-110 Zertifizierungsprüfung sehr wichtig. Und jetzt ist 300-110 Prüfung öffentlich zertifiziert. Außerdem kann diese Prüfung Ihre ausgezeichnete IT-Fähigkeit beweisen. Aber es ist sehr schwer, Cisco 300-110 Prüfung zu bestehen. Und die Schwierigkeit ist so groß wie ihre Bedeutung. Trotzt dieser Schwierigkeit sorgen Sie sich bitte nicht um den Erfolg, die Prüfung ablegen, weil ExamFragen Ihnen helfen kann, diese schwierige 300-110 Prüfung zu bestehen.
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