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| Section | Objectives |
|---|---|
| Wireless Site Survey and Requirements Analysis | - Physical environment assessment and constraints - Business and technical requirements gathering - Coverage and capacity planning |
| High Availability and Performance Optimization | - Load balancing and RF optimization - Redundancy design for controllers and APs |
| Troubleshooting and Validation | - Validation tools and post-deployment testing - Wireless performance troubleshooting methodologies |
| RF Fundamentals and Design Principles | - RF behavior and propagation - Antenna types and placement strategies - Channel planning and interference mitigation |
| Wireless Security Design | - 802.1X authentication and RADIUS integration - WPA2/WPA3 enterprise security design - Guest access and segmentation strategies |
| Cisco Wireless Architecture | - Controller-based architecture (WLC) - Lightweight Access Point (LAP) deployment models - Mobility groups and roaming design |
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NEW QUESTION # 121
A community bank has three campus locations and one HQ with the data center. Each campus has four Cisco Catalyst 9120 APs. Poor WAN uplinks cause impacted connectivity back to HQ, and each campus is planned to have its own EWC controller based on C9120 AP to keep traffic local. Guest WLAN will be routed locally.
Employee WLAN must be authenticated 802.1x PEAP via HQ ISE but can pass traffic locally once authenticated. HQ WLC will be the primary backup WLC for each WLC. Which design approach should the consulting engineer take?
Answer: B
Explanation:
This community bank design scenario requires precise alignment of EWC deployment scale, AAA integration, and traffic routing decisions with the stated constraints. With four APs per campus and a goal of local traffic handling, converting a single C9120 to EWC mode is optimal - converting two APs to EWC (Options B and C) on a four-AP campus wastes 50% of campus AP infrastructure for controller functions rather than client service. The single EWC AP serves as the active local controller for the remaining three client-serving APs. The HQ WLC set as N+1 backup ensures that if the branch EWC fails, the remaining APs fall back to the centralized controller. For the guest WLAN, local web authentication on the guest VLAN provides the locally routed guest access requirement without requiring WAN connectivity to HQ. For the employee WLAN, adding the HQ ISE AAA server to the EWC ' s RADIUS configuration enables 802.1x PEAP authentication to traverse the WAN to ISE at the time of client association. Once authenticated, traffic is locally switched - satisfying both the central authentication and local traffic routing requirements simultaneously. Option D ' s use of guest anchor for the employee WLAN is architecturally incorrect and would route traffic through HQ rather than locally. Reference: WLSD Study Guide - EWC Design, N+1 Redundancy, AAA Integration for Branch WLANs, Local Web Authentication.
NEW QUESTION # 122
A customer has a Cisco wireless network with two Cisco Catalyst 9800 Series WLCs in a high availability cluster, 50 Cisco 2800I APs, and all SSIDs and services are 5 GHz only. A security mandate requires that rogue APs be scanned and identified in 2.4 GHz and 5 GHz bands without impacting existing client connectivity. How must the wireless network be reconfigured to meet the requirement without purchasing additional APs?
Answer: D
Explanation:
The Cisco Aironet 2800 Series APs feature a dual-radio architecture with a dedicated 5 GHz radio (slot 1) and a Flexible Radio Assignment (XOR) radio (slot 0) that can operate in either 2.4 GHz or 5 GHz, or be assigned to monitor mode for scanning functions. Since all existing SSIDs and services are 5 GHz only, the slot 1 (dedicated 5 GHz) radio is responsible for all current client connectivity - it must remain in Client Serving mode to maintain uninterrupted 5 GHz WLAN service. The XOR radio (slot 0), currently either idle or operating as a secondary 5 GHz radio, can be repurposed without impacting client service. Setting the XOR radio to Monitor mode enables it to continuously scan all channels across both the 2.4 GHz and 5 GHz spectrum for rogue AP detection, using the embedded CleanAir and WIDS capabilities. In Monitor mode, the XOR radio operates full-time as a dedicated scanner, providing rogue detection coverage on 2.4 GHz (previously uncovered since all services were 5 GHz) and supplementary scanning on 5 GHz. This eliminates the need for additional dedicated monitor mode APs. Options A, C, and D either place the slot 1 radio in a non-client-serving role (disrupting existing connectivity) or use the inappropriate Sniffer mode instead of Monitor mode for rogue detection. Reference: WLSD Study Guide - Cisco 2800 XOR Radio Architecture, Monitor Mode for Rogue Detection, Flexible Radio Assignment, WIDS Design.
NEW QUESTION # 123
How are mobility groups created, excluding mobility anchors?
Answer: C
Explanation:
Mobility groups are created by configuring each Wireless LAN Controller (WLC) to use the same mobility domain name (mobility group name) and defining each WLC as a peer in the static mobility members list of every other WLC in the group. This bidirectional configuration establishes the trusted peer relationship and enables WLCs to exchange client information, security credentials, and state data for seamless roaming. The same mobility group name on all WLCs creates a shared identity; the static peer list defines which controllers are trusted mobility partners and provides their management IP addresses and MAC addresses for tunnel establishment. Option A is incorrect because members should run compatible (ideally the same) software versions, not different ones. Option B is incorrect - all WLCs in a mobility group must use the same virtual IP address for proper roaming. Option D is incorrect - in an HA SSO pair, the pair presents as a single logical mobility entity, not as two separate peers. Reference: WLSD Study Guide - Mobility Group Configuration, Peer Configuration Requirements, Mobility Domain Architecture.
NEW QUESTION # 124
A network engineer is designing a new wireless network. The network must include these requirements: ?optimized performance ?avoid interference ?availability in high-density areas ?roaming Which two approaches must be taken? (Choose two.)
Answer: B,C
Explanation:
The design requirements -- optimized performance, interference avoidance, high-density support, and roaming capability -- collectively point to a dual-band strategy using narrow channel widths.
For 5 GHz operation (Option A), 20 MHz channels are the correct choice for high-density and campus- scale deployments. The 5 GHz band has significantly more non-overlapping channels compared to 2.4 GHz (up to 24 non-overlapping 20 MHz channels in UNII-1, UNII-2, and UNII-3), enabling a robust channel reuse plan with minimal co-channel interference and excellent roaming cell separation.
NEW QUESTION # 125
An engineer is designing a WLAN to support wireless VoIP handsets in an enterprise campus.
Which set of RF design targets must be met at the cell edge?
Answer: A
Explanation:
Cisco's validated design targets for voice over WLAN require a stronger and cleaner signal than data-only deployments because voice is delay- and loss-sensitive and cannot tolerate retransmissions. The cell edge RSSI target is -67 dBm, which ensures the handset can sustain a high enough data rate to keep airtime consumption low. The SNR target is 25 dB, which provides sufficient margin above the noise floor for reliable demodulation without excessive retries. Cell overlap of 20% ensures the handset can find and associate to the next AP before the current signal degrades, allowing roams to complete without dropped audio. Data-only designs typically use -72 dBm and 20 dB SNR with 15% to 20% overlap, which is insufficient for voice. Overly aggressive targets such as -62 dBm with 35% overlap create unnecessary co-channel interference and increase cost.
NEW QUESTION # 126
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