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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Wireless Site Survey | 25% | - Predictive site survey - Collect design requirements and evaluate constraints - Layer 1 site survey analysis - Material attenuation and its design effects - Planning tools and network metrics evaluation - Pre-deployment site survey - Post-deployment site survey |
| Topic 2: WLAN High Availability | 20% | - Design controller high availability - Design AP high availability |
| Topic 3: Mobility | 25% | - Site Tags - Design mobility groups - Optimize client roaming - Validate mobility tunneling |
| Topic 4: Wired and Wireless Infrastructure | 30% | - Design radio management - Physical infrastructure requirements - Logical infrastructure requirements - Design for data, voice, video, location - Design high-density wireless networks - Design wireless bridging (mesh) |
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NEW QUESTION # 44
A network engineer must design a new Cisco wireless solution that contains three Cisco 9800-40 WLCs.
WLC1 and WLC2 will be combined into one logical unit with SSO and a backup WLC named WLC3 will be joined by using a mobility tunnel. Link redundancy between the WLCs and the switches is required. Which WLCs must the design provide connectivity to the network equipment for LAG to be effective in an SSO failover scenario?
Answer: B
Explanation:
In a Cisco Catalyst 9800 SSO deployment using Link Aggregation Group (LAG) for network interface redundancy, the SSO pair - WLC1 (active) and WLC2 (standby) - must both have their physical interfaces connected to the network infrastructure as part of the LAG bundle. LAG on the 9800 in an SSO configuration is implemented as a multi-chassis LAG across both the active and standby controllers. This means both WLC1 and WLC2 contribute physical member links to the port channel, and the connected switches must have LACP or PAgP bundle members from both controllers in the same port channel group. When an SSO failover occurs - WLC1 fails and WLC2 takes over as active - the LAG remains operational because WLC2 ' s physical links are already established members of the bundle and continue forwarding traffic without any link renegotiation. If only WLC1 had LAG connectivity and WLC2 had independent links, an SSO failover would cause a LAG topology change requiring re-convergence, introducing downtime. WLC3 is a separate N+1 backup controller joined via a mobility tunnel - not part of the SSO pair and its LAG configuration is independent. Reference: WLSD Study Guide - Catalyst 9800 SSO with LAG, Multi-Chassis Link Aggregation, High Availability Network Redundancy Design.
NEW QUESTION # 45
An engineer must perform a predictive wireless survey to indicate the number of access points required. The engineer has created a new project and imported the floor plan. Which step must be taken next for accurate AP placement?
Answer: C
Explanation:
After creating a new predictive survey project and importing the floor plan, the next mandatory step is to set the scale of the floor plan. Setting the scale is critical because all subsequent measurements - AP coverage radius, cell overlap calculations, and distance-based attenuation modeling - depend on the accuracy of the floor plan ' s physical dimensions. If the scale is incorrect, the predictive model will place APs at incorrect distances relative to each other and produce inaccurate coverage predictions. The scale is typically set by the engineer clicking on two known points on the floor plan and entering the real-world distance between them, calibrating the software ' s measurement system. Analyzing the network (Option A) and placing APs (Option C) come after the scale is established. Identifying the coverage area (Option B) is often done simultaneously with scale setting or immediately after. Setting the scale first ensures all subsequent work is based on accurate physical dimensions. Reference: WLSD Study Guide - Ekahau Predictive Survey Workflow, Floor Plan Import and Scale Setting, Pre-Deployment Survey Methodology.
NEW QUESTION # 46
An engineer is designing guest access where guest traffic from foreign controllers on the internal network must terminate in the DMZ. Which two requirements must the design satisfy? (Choose two.)
Answer: B,E
Explanation:
Auto-anchor guest tunneling requires that the guest WLAN be configured identically on both the foreign and anchor controllers (Option B) - the SSID, security settings, and WLAN ID must match, because the anchor applies its own policy to the tunneled session and a mismatch causes the client to be dropped or assigned incorrect policy. A mobility tunnel between the two controllers (Option D) is the transport that carries the guest traffic from the internal foreign controller to the DMZ anchor, allowing the client's data to bypass the internal network entirely and terminate on the DMZ segment. Controllers must be configured as mobility peers of each other, but they do not need to share a mobility group name for auto-anchor to function, and they explicitly do not need to be in the same Layer 2 VLAN - the whole point of the design is that the anchor sits in a separate, firewalled DMZ subnet. RF group leadership is unrelated to guest tunneling.
NEW QUESTION # 47
A campus has two controllers, each with client VLANs on different subnets. A client associated to an AP on WLC-1 roams to an AP on WLC-2. Which behavior does the mobility design produce, and what is required?
Answer: C
Explanation:
When a client roams between controllers whose client VLANs are on different subnets, the controllers perform a Layer 3 roam. The original controller retains the role of anchor for that client's session, the new controller becomes the foreign controller, and a mobility tunnel between them carries the client's traffic so the client can retain its existing IP address and keep its sessions alive. Cisco controllers use asymmetric tunneling for this: traffic from the client is forwarded by the foreign controller, while traffic destined for the client is tunneled from the anchor to the foreign controller, which preserves reachability without requiring the client to renumber. A Layer 2 roam occurs only when both controllers place the client on the same subnet, and it still requires the controllers to be mobility peers so client context can be exchanged. Forcing a new IP address or a full reauthentication would break the client's applications, which is precisely what the mobility architecture is designed to prevent.
NEW QUESTION # 48
A customer has two Cisco 5520 WLCs that manage all APs throughout the network. The WLCs are in different locations to provide geographical redundancy. A mobility group has been configured on both WLCs and has an UP status on both controllers. The APs in location A are statically configured to use controller A as the primary and controller B as the secondary. If the WLC in location A goes offline, the APs successfully join the WLC in location B, but they do not fail over to their primary configured controller when it recovers.
Which configuration task fixes the issue?
Answer: A
Explanation:
Enabling AP fallback globally on the WLC allows access points to reconnect to their primary controller after they have connected to a secondary controller due to the primary being offline. This is the exact behavior described in the scenario - APs successfully fail over to the secondary WLC but do not return to the primary WLC when it recovers. AP Fallback is a WLC-level setting that monitors the availability of each AP ' s configured primary controller and initiates a reconnection when the primary becomes reachable again.
Without AP Fallback enabled, APs remain on whatever controller they most recently joined - in this case, the secondary - even after the primary recovers. The CAPWAP AP Controller IP Address command (Option A) permanently changes the primary controller configuration on the AP, which is not the intended solution - the AP already has the correct primary configured. DHCP Option 43 (Option B) is used for initial AP discovery, not fallback. AP Failover Priority (Option D) controls which APs are processed first during a failover event, not whether APs return to their primary controller. Reference: WLSD Study Guide - AP Fallback Configuration, N+1 Redundancy Recovery, Controller Primary/Secondary Hierarchy.
NEW QUESTION # 49
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