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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Mobility | 25% | - Site Tags - Optimize client roaming - Validate mobility tunneling - Design mobility groups |
| Topic 2: Wired and Wireless Infrastructure | 30% | - Logical infrastructure requirements - Physical infrastructure requirements - Design wireless bridging (mesh) - Design high-density wireless networks - Design for data, voice, video, location - Design radio management |
| Topic 3: Wireless Site Survey | 25% | - Collect design requirements and evaluate constraints - Planning tools and network metrics evaluation - Layer 1 site survey analysis - Pre-deployment site survey - Predictive site survey - Material attenuation and its design effects - Post-deployment site survey |
| Topic 4: WLAN High Availability | 20% | - Design controller high availability - Design AP high availability |
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NEW QUESTION # 31
A customer has a centralized wireless deployment with N+1 high availability and few open authentication SSIDs configured. After failover, all APs are broadcasting all SSIDs, but the clients are assigned IP addresses from a different subnet. The WLANs on both WLCs are configured with the same dynamic interfaces. Which feature must be incorporated in the wireless design of the second controller?
Answer: C
Explanation:
VLAN Select is a feature that allows for the dynamic assignment of clients to different VLANs from a pool based on various criteria, such as load balancing or location. In a centralized wireless deployment with N+1 high availability, if clients are receiving IP addresses from a different subnet after failover despite the WLANs being configured with the same dynamic interfaces, the issue is that the second controller's WLAN interface mapping resolves to a different VLAN or DHCP scope. VLAN Select ensures that client VLAN assignment is consistent regardless of which controller the client connects to, preventing the subnet change behavior observed during failover.
Without VLAN Select, even identically named dynamic interfaces on two WLCs may map to different VLANs if the underlying switch configuration differs.
NEW QUESTION # 32
An enterprise network administrator is asked to set up an experimental WLAN for a collaboration project with a local service provider. The WLAN must be anchored to a WLC in the service provider data center using legacy mobility mode. After the configurations are completed on the WLCs and the firewalls in the path, the data path mobility tunnel is failing to come up. What should be performed by the administrator to debug the issue?
Answer: B
Explanation:
When a data path mobility tunnel fails to come up between WLCs, one of the key troubleshooting steps is to verify whether the necessary ports are open through firewalls in the path. Cisco AireOS mobility tunnels use UDP port 16666 for mobility control traffic and IP Protocol 97 (EtherIP) for mobility data traffic in legacy mode. Establishing a Telnet connection from a local PC to the firewall on port 16666 tests whether the control path port is reachable and not being blocked by the firewall. If the Telnet connection fails, it confirms that the firewall is blocking port 16666, which would prevent the mobility control tunnel from establishing - a prerequisite for the data tunnel. While a Telnet test to port 16666 specifically tests the control path, in practice this is the first verification performed when the data path cannot establish (since the data path depends on the control path being operational). IP Protocol 97 cannot be tested via Telnet (which is TCP). The mping command (Option D, not ' mapping ' ) tests mobility tunnel connectivity from the WLC itself after the tunnel is established. Reference: WLSD Study Guide - Mobility Tunnel Troubleshooting, Firewall Port Requirements, UDP 16666 and IP Protocol 97.
NEW QUESTION # 33
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: A
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 # 34
A customer has 10 access point licenses available on their backup Cisco WLC and their primary Cisco WLC is at full capacity. 5 access points are set to high failover priority and 7 access points are set to critical failover priority. During a failure, not all critical access points failed over to the backup Cisco WLC. Which configuration is the cause of this issue?
Answer: D
Explanation:
The issue described indicates that there are more critical priority access points than the backup Cisco WLC can accommodate with its available AP licenses. The backup WLC has only 10 licenses available, but 7 APs are set to critical failover priority and 5 to high failover priority -- a total of 12 APs attempting to join. Even though critical priority APs are processed before high priority APs, the backup WLC can only accept 10 APs total (its license limit). Since there are 7 critical priority APs and only 10 total licenses, all 7 critical APs will fail over successfully -- but if the scenario involves additional critical APs beyond the license limit, the excess will not be able to join. The oversubscription of the critical priority AP count relative to available backup WLC capacity is the root cause.
NEW QUESTION # 35
A university wants to deploy a high density of APs in an area where a high number of users congregate. Which functionality allows the university to optimize the RF settings for APs that operate in different environments or coverage zones?
Answer: B
Explanation:
RF Profiles are a Cisco WLC configuration construct that allows administrators to define a customized set of Radio Resource Management (RRM) parameters and apply them to a subset of APs operating in a specific environment or coverage zone. Within a university high-density deployment -- where a lecture hall, outdoor quad, cafeteria, and library may each require fundamentally different RF settings -- RF Profiles enable differentiation without globally modifying all RRM parameters. An RF Profile can define custom values for: minimum mandatory data rates, maximum transmit power, minimum transmit power, channel width (20/40/80 MHz), RxSOP thresholds, client load balancing parameters, and coverage hole detection sensitivity. This allows the engineer to apply aggressive interference mitigation settings to high-density assembly areas while maintaining full-coverage settings for perimeter zones.
NEW QUESTION # 36
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