An engineer is designing a new wireless network. Based on the design, O®ceExtend AP functionality must be used. Which type of license must the Cisco 5520 WLC v8.3 have?
A. Base license
B. O®ceExtend AP license
C. WPlus license
D. Plus license
Explanation:
Why D is Correct?
OfficeExtend AP (OEAP) functionality requires a Plus license on the Cisco 5520 WLC (v8.3).
The Plus license enables remote AP features, including OEAP, which allows employees to securely connect to the corporate network from home/remote offices.
Reference: Cisco WLC Licensing Guide (v8.3).
Why Other Options Are Incorrect?
A. Base license: Only supports local APs, not OEAP.
B. OfficeExtend AP license: Misleading—OEAP is a feature enabled by the Plus license, not a standalone license.
C. WPlus license: Doesn’t exist—Cisco uses Base/Plus/AP Count licenses.
Key Licensing Notes:
Plus License: Also enables FlexConnect, Mobility, and Guest Anchor.
OEAP Requirements:
WLC must run v8.3 or later.
APs must be in OEAP mode (not local mode).
Reference:
Cisco 5520 WLC Datasheet: Confirms Plus license for advanced features.
Final Note:
D (Plus license) is mandatory for OEAP. Options A/B/C are invalid or incomplete. Always verify license compatibility before deployment.
An engineer is working for an enterprise and deployed a Cisco 9800 Series Wireless Controller. The wireless infrastructure serves the employees and guest users across the company. The engineer must configure the controller to alleviate the sticky client issue in the deployment. Which action resolves the issue?
A. Enable CHDM.
B. Enable Optimize Roaming.
C. Enable 802.11k.
D. Enable data RSSI to -90db.
Explanation:
Why B is Correct?
Optimize Roaming on the Cisco 9800 WLC proactively forces sticky clients to roam to a better AP by:
Using Client Match to steer clients based on real-time RF conditions.
Enforcing load balancing and minimum RSSI thresholds.
This directly addresses sticky clients (clients clinging to weak AP signals).
Reference: Cisco 9800 Optimize Roaming Guide.
Why Other Options Are Incorrect?
A. CHDM (Cisco High-Density Mobility): Improves scalability in dense deployments but doesn’t fix sticky clients.
C. 802.11k: Provides neighbor reports to assist roaming but doesn’t enforce it.
D. Data RSSI -90dBm: Too low—clients will stay connected to unusably weak signals.
Steps to Enable Optimize Roaming:
Navigate to Configuration > Wireless > Advanced > Optimize Roaming.
Set Minimum RSSI (e.g., -70 dBm) and Client Match.
Reference:
CWNP Sticky Client Troubleshooting: Recommends active steering for sticky clients.
Final Note:
B is the only solution that enforces roaming. Options A/C/D are passive or unrelated. Always test post-configuration client behavior
A customer has multiple WLCs running N+1 redundancy with APs equally distributed. Only one WLC is a designated backup for all other WLCs so the customer must ensure that the most critical APs remain registered or get priority over other APs in case of a WLC failure. However, the customer notices on WLC failure that some critical APs remain unregistered What needs to be addressed in the design?
A. AP fallback is not enabled on the backup WLC.
B. AP failover priority is not enabled globally on the backup WLC.
C. AP failover priority is not enabled globally on the failed WLC.
D. AP fallback is not enabled on the failed WLC.
Explanation:
Why B is Correct?
AP Failover Priority must be enabled globally on the backup WLC to ensure:
Critical APs (marked as Critical/High priority) are prioritized during failover.
Non-critical APs are dropped if license limits are exceeded.
Without this, the backup WLC treats all APs equally, causing critical APs to fail registration due to oversubscription.
Reference: Cisco WLC AP Failover Priority Configuration.
Why Other Options Are Incorrect?
A/D. AP Fallback: Controls whether APs return to primary WLC post-failure—irrelevant here.
C. Failed WLC settings: Failover priority is enforced by the backup WLC, not the failed one.
Reference:
Cisco High Availability Best Practices: Requires priority on the backup WLC.
Final Note:
B is the root cause. Options A/C/D misdiagnose the issue. Always validate backup WLC settings pre-deployment.
The wireless survey report shows APs staggered throughout a facility, with several of them placed on the exterior walls. Other APs are located at building corners and major turns in the structure layout. Assuming that all survey locations are optimized with a minimum of -67 RSSI at cell edges with 20% overlapping cells, for which purpose is this survey model used?
A. location services, VoIP, data, and video
B. streaming video with VoIP, data, and HD resolution
C. location-based services, BYOD preparation, and HD video streaming
D. voice, data clients, and video on demand
Explanation:
Why A is Correct?
The described survey model (APs on exterior walls, corners, and turns with -67 dBm edge coverage and 20% overlap) is optimized for:
Location services: Requires uniform signal propagation for triangulation.
VoIP: Needs consistent -67 dBm RSSI and overlap for seamless roaming.
Data/Video: Balanced coverage ensures throughput for general and real-time traffic.
This design avoids coverage holes and supports diverse applications.
Reference: Cisco High-Density Wireless Design Guide.
Why Other Options Are Less Accurate?
B. HD video streaming: Requires higher RSSI (-65 dBm) and more overlap (25–30%).
C. BYOD/HD video: Overkill—BYOD doesn’t need corner APs, and HD video demands stricter thresholds.
D. Video on demand: Less critical for corner/wall APs—focuses on capacity, not edge coverage.
Key Design Metrics:
-67 dBm edge RSSI: Ideal for VoIP and location tracking.
20% overlap: Ensures roaming without packet loss.
Reference:
CWNP Voice over Wi-Fi (VoWLAN) Guidelines: Recommends -67 dBm for voice.
Final Note:
A is the most balanced use case. Options B/C/D either over-specify or misalign with the survey model. Always validate with application requirements.
A customer requires that two wireless APs be installed in a reception area, in a historic building, the impact of the APs on the appearance of the reception area must be minimized. Which two AP antennas should be used? (Choose two.)
A. AP with a Yagi antenna
B. AP with a patch antenna
C. AP with a monopole antenna
D. AP with an integrated antenna
E. AP with a dipole antenna
Explanation:
Why D and B are Correct?
D (Integrated antenna AP):
Low-profile design blends into ceilings/walls (e.g., Cisco 9105/9120 with internal antennas).
Ideal for aesthetic-sensitive areas like historic buildings.
B (Patch antenna):
Flat, discreet form factor (e.g., mounted behind paintings or decor).
Directional coverage minimizes visible hardware.
Both options minimize visual impact while maintaining performance.
Reference: Cisco Aironet Antenna Guide.
Why Other Options Are Incorrect?
A (Yagi) / E (Dipole): Bulky and visually intrusive.
C (Monopole): Obtrusive; typically used outdoors.
Key Considerations for Historic Buildings:
Integrated antennas: Hidden in ceiling tiles or faux fixtures.
Patch antennas: Concealed behind decor (e.g., bookshelves, moldings).
Reference:
CWNP Aesthetic Deployment Guidelines: Recommends integrated/patch antennas for historic sites.
Final Note:
D and B are the only discreet options. Options A/C/E are unsuitable for aesthetic needs. Always verify coverage post-installation.
When conducting a site survey for real-time traffic over wireless, which two design capabilities of smartphones and tablets must be considered? (Choose two.)
A. no support for 802.11ac
B. higher data rates than laptops
C. fewer antennas than laptops
D. no support for 802.11r
E. lower data rates than laptops
Explanation:
Why C and E are Correct?
C (Fewer antennas):
Most smartphones/tablets have 1x1 or 2x2 MIMO antennas (vs. laptops with 2x2 or 3x3), limiting spatial streams and throughput.
E (Lower data rates):
Due to smaller antennas and power constraints, mobile devices achieve lower PHY rates than laptops (e.g., 433 Mbps vs. 1.3 Gbps on 802.11ac).
These factors directly impact real-time traffic (VoIP, video) by reducing capacity and increasing latency.
Reference: Cisco Wireless Design for Mobile Devices.
Why Other Options Are Incorrect?
A (No 802.11ac support): False—most modern smartphones support 802.11ac.
B (Higher data rates than laptops): False—laptops typically outperform mobile devices.
D (No 802.11r support): False—many iOS/Android devices support 802.11r for fast roaming.
Key Design Adjustments:
Higher AP density to compensate for mobile device limitations.
Enable WMM (Wi-Fi Multimedia) to prioritize real-time traffic.
Reference:
IEEE 802.11ac Whitepaper: Highlights mobile device antenna constraints.
Final Note:
C and E are the only factual constraints. Options A/B/D misrepresent mobile device capabilities. Always test with target devices during surveys.
How should the concept of mobility domains and mobility groups be explained to a customer?
A. WLCs do not need to be in the same mobility domain to communicate with each other Mobility groups constrain the distribution of security context of a client and also constrain AP fail-over between controllers.
B. A mobility group does not constrain the distribution of security context of a client and also does not constrain AP fail-over between controllers when the WLCs are in the same mobility domain.
C. if WLCs are in same mobility domain, they communicate with each other. Mobility groups constrain the distribution of security context of a client and also constrain AP fail-over between controllers.
D. If WLCs are in the same mobility domain, they communicate with each other but. if an anchor WLC ® present, it must: be in the same mobility domain for communication to be possible.
Explanation:
Why C is Correct?
Mobility Domain:
A mobility domain is a logical group of WLCs that share client context (e.g., security keys, QoS policies) for seamless roaming.
WLCs in the same mobility domain can communicate to transfer client sessions (e.g., Layer 3 roaming).
Mobility Group:
A mobility group is a subset of WLCs within a mobility domain that constrains AP failover and client context distribution.
APs fail over only to WLCs in their mobility group, not the entire domain.
Reference: Cisco Mobility Groups and Domains.
Why Other Options Are Incorrect?
A:Incorrect—WLCs must be in the same mobility domain to share client context.
B:Incorrect—Mobility groups do constrain AP failover and client context distribution.
D:Incorrect—Anchor WLCs do not need to be in the same mobility domain as foreign WLCs (they use guest tunneling).
Key Concepts:
Mobility Domain: Enables inter-controller roaming.
Mobility Group: Limits AP failover targets and context sync scope.
Reference:
Cisco Mobility Design Guide: Explains domain/group roles in roaming.
Final Note:
C is the clearest and most accurate explanation. Options A/B/D contain factual errors or omissions. Always map mobility groups to redundancy requirements.
An engineer is designing a mesh wireless network. The network must full these requirements: • bridge mode APs must be used • WPA2-PSK • minimize wireless traffic tunneled to the WLC
A. bridge RAP
B. Flex + Bridge
C. FlexConnect
D. bridge MAP
Explanation:
Why D is Correct?
Bridge Mode MAP (Mesh Access Point):
Operates in local bridging mode, forwarding client traffic locally (not tunneling to the WLC), meeting the requirement to minimize tunneled traffic.
Supports WPA2-PSK for mesh link encryption.
Works with RAP (Root AP) to form a mesh without FlexConnect.
Reference: Cisco Mesh Networking Guide.
Why Other Options Are Incorrect?
A. Bridge RAP: A RAP is the root of the mesh and must tunnel traffic to the WLC—violates the "minimize tunneling" requirement.
B. Flex + Bridge: FlexConnect tunnels traffic by default unless configured for local switching (overcomplicates the design).
C. FlexConnect: Primarily for remote sites; doesn’t natively support mesh bridging.
Key Design Points:
RAP: Connects to the WLC and establishes mesh backhaul.
MAP (Bridge Mode): Forwards client traffic locally (no tunneling).
WPA2-PSK: Secures mesh links between RAP and MAP.
Reference:
Cisco Outdoor Mesh Design: Recommends bridge MAPs for local traffic handling.
Final Note:
D (bridge MAP) is the only option meeting all requirements. Options A/B/C either tunnel traffic or add unnecessary complexity. Always validate mesh links with spectrum analysis
A rapidly expanding company has tasked their network engineer with wirelessly connecting a new cubicle area with Cisco workgroup bridges until the wired network is complete. Each of 42 new users has a computer and VoIP phone. How many APs for workgroup bridging must be ordered to keep cost at a minimum while connecting all devices?
A. 4
B. 5
C. 6
D. 7
Explanation:
Why C is Correct?
Cisco Workgroup Bridges (WGBs) support up to 8 wired clients per device in Universal WGB mode (required for VoIP phones + computers).
42 users ÷ 8 clients/WGB = 5.25 → Round up to 6 WGBs to cover all devices.
Ordering 5 WGBs would leave 2 clients unconnected (5 × 8 = 40 < 42).
Reference: Cisco WGB Client Limits.
Why Other Options Are Incorrect?
A. 4 WGBs: Supports only 32 clients (4 × 8), leaving 10 unconnected.
B. 5 WGBs: Supports 40 clients, leaving 2 unconnected.
D. 7 WGBs: Over-provisions (56 clients), increasing cost unnecessarily.
Key Notes:
Universal WGB Mode: Required for both VoIP phones and computers.
Client Limit: Hard-capped at 8 wired clients per WGB.
Reference:
Cisco WGB Deployment Guide: Confirms 8-client limit for Universal WGB.
Final Note:
C (6 WGBs) is the minimal cost solution. Options A/B under-provision; D overspends. Always validate client counts per WGB mode.
A customer has a single anchor WLC named Anchor A. Anchor A is in a DMZ and provides guest access. The customer wants to deploy an additional anchor controller named Anchor B to provide redundancy if Anchor A fails. Which design approach should be taken for the guest WLAN priority on the foreign WLC for each anchor WLC?
A. Set Anchor A to priority 3 and Anchor B to priority 3
B. Set Anchor A to priority 3 and Anchor B to priority 1.
C. Set Anchor A to priority 1 and Anchor B to priority 1.
D. Set Anchor A to priority 1 and Anchor B to priority 3.
Explanation:
Why D is Correct?
Anchor Priority determines the order in which guest clients are assigned to anchor controllers.
Priority 1 (Anchor A): Primary anchor for guest traffic.
Priority 3 (Anchor B): Backup anchor (lower priority) used only if Anchor A fails.
This ensures high availability while avoiding load balancing (which could disrupt sessions).
Reference: Cisco Anchor Priority Configuration.
Why Other Options Are Incorrect?
A. Both priority 3: No primary anchor—clients may randomly connect to either.
B. Anchor A (3), Anchor B (1): Reverses failover logic (Anchor B becomes primary).
C. Both priority 1: Causes load balancing, risking session drops during failover.
Reference:
Cisco Guest Access HA Design Guide: Recommends priority-based anchor failover.
Final Note:
D is the only correct HA design. Options A/B/C risk instability or incorrect failover. Always test failover scenarios.
A customer asks an engineer to explain the concept of mobility domains and mobility groups. Which statement does the engineer respond with?
A. A mobility group does not constrain the distribution of security context of a client and also does not constrain AP fail-over between controllers when the WLC are in the same mobility domain.
B. If WLCs are in the same mobility domain, they communicate with each other but, if an anchor WLC is present it must be in the same mobility domain for communication to be possible.
C. If WLCs are in the same mobility domain, they communicate with each other. Mobility groups constrain the distribution of security context of a client and also constrain AP fail-over between controllers.
D. WLCs do not need to be in the same mobility domain to communicate with each other. Mobility groups constrain the distribution of security context of a client and also constrain AP fail-over between controllers.
Explanation:
Why C is Correct?
Mobility Domain:
A mobility domain is a logical group of WLCs that share client context (security keys, QoS policies) for seamless roaming.
WLCs in the same mobility domain can communicate to transfer client sessions (e.g., Layer 3 roaming).
Mobility Group:
A mobility group is a subset of WLCs within a mobility domain that constrains AP failover and client context distribution.
APs fail over only to WLCs in their mobility group, not the entire domain.
Reference: Cisco Mobility Groups and Domains.
Why Other Options Are Incorrect?
A: Incorrect—Mobility groups do constrain AP failover and client context distribution.
B: Incorrect—Anchor WLCs do not need to be in the same mobility domain as foreign WLCs (guest tunneling works across domains).
D:Incorrect—WLCs must be in the same mobility domain to share client context.
Key Concepts:
Mobility Domain: Enables inter-controller roaming.
Mobility Group: Limits AP failover targets and context sync scope.
Reference:
Cisco Mobility Design Guide: Explains domain/group roles in roaming.
Final Note:
C is the clearest and most accurate explanation. Options A/B/D contain factual errors or omissions. Always map mobility groups to redundancy requirements
An engineer must decide the cell overlap for a wireless voice deployment. Which Cisco measurement recommendation should be considered?
A. The edge of the cell should be -67 dBm.
B. The edge of the cell should be below 35 RSSI.
C. The measurement should be done on the 2.4-GHz band.
D. One AP should be deployed per 3000 square feet.
Explanation:
For voice over Wi-Fi deployments, Cisco recommends:
-67 dBm as the minimum signal level at the cell edge to ensure consistent voice quality and minimal packet loss.
This provides sufficient signal strength for real-time applications like VoIP while maintaining smooth roaming between APs.
Why Other Options Are Incorrect:
B) The edge of the cell should be below 35 RSSI – RSSI is a relative measurement (0–100 scale) and is less precise than dBm. Cisco recommends dBm for proper RF planning.
C) The measurement should be done on the 5-GHz band – Voice deployments should prioritize 5 GHz (not 2.4 GHz) due to less interference and more available channels.
D) One AP per 3000 square feet – This is a generic guideline for data coverage, not voice. Voice requires denser AP placement (smaller cells) for better roaming and call quality.
Reference:
Cisco Voice over Wireless LAN (VoWLAN) Design Guide recommends -67 dBm for voice applications.
Cisco Enterprise Mobility 4.1 Design Guide (CVD) also supports this value for real-time traffic..
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