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Cisco 300-110 Exam Syllabus Topics:

Section	Weight	Objectives
Wireless Infrastructure Design	30%	- Wireless Controller architecture and deployment 1. Controller models and scalability 2. Redundancy and high availability design 3. AP modes and deployment options - Wired-wireless integration design 1. Switching infrastructure requirements 2. VLAN and QoS design 3. PoE and power planning - High-density wireless design 1. Co-channel interference mitigation 2. Channel planning and power management 3. Capacity optimization techniques
Wireless Site Survey	25%	- RF propagation and attenuation analysis - Pre-deployment survey and validation - Layer 1 site survey execution and analysis - Design requirements collection and constraint evaluation 1. Security requirements definition 2. Real-time application requirements 3. Client density and capacity planning 4. AP and antenna type selection 5. Deployment type considerations
Mobility Design	25%	- Mobility architecture models 1. Layer 2 and Layer 3 roaming 2. Mobility groups and domains 3. Anchor and foreign controller design - Guest mobility and BYOD design - Roaming optimization 1. 802.11r/k/v standards implementation 2. Fast Secure Roaming
WLAN High Availability and Security Design	20%	- Security architecture design 1. Encryption and privacy mechanisms 2. Wireless intrusion prevention design 3. Authentication and authorization frameworks - Management and monitoring design - High availability design 1. Controller failover and stateful switchover 2. AP redundancy and resiliency 3. N+1 and N+N redundancy models

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Cisco Designing Cisco Wireless Networks Sample Questions (Q19-Q24):

NEW QUESTION # 19
During a post-deployment site survey, issues are found with non-Wi-Fi interference. What should the engineer use to identify the source of the interference?

A. Cisco spectrum expert
B. Wireshark
C. Network analysis module
D. Wireless intrusion prevention

Answer: A

Explanation:
Cisco Spectrum Expert is a dedicated spectrum analysis tool designed to identify and analyze non-Wi-Fi interference sources at Layer 1. During a post-deployment site survey, it can detect interference from various devices such as cordless phones, Bluetooth devices, microwave ovens, video cameras, and other unlicensed RF emitters. The tool provides a visual representation of the RF environment across the frequency spectrum, allowing engineers to pinpoint the exact source of interference and characterize it by duty cycle, frequency, and interference pattern. A network analysis module (Option A) operates at Layer 2 and above, unable to detect non-802.11 RF emissions. Wireless intrusion prevention (Option B) detects rogue APs and 802.11 attacks but not Layer 1 RF noise. Wireshark (Option C) is a packet capture tool for Layer 2-7 analysis and cannot detect non-Wi-Fi RF energy. Reference: WLSD Study Guide - Layer 1 Spectrum Analysis, Post- Deployment Survey, Non-Wi-Fi Interference Identification.

NEW QUESTION # 20
An engineer is performing a Layer 1 passive wireless site survey utilizing a channel analyzer software in the
2.4 GHz spectrum. Which chart indicates the ratio of interference present during the duration of the capture?

A. Option C
B. Option B
C. Option A
D. Option D

Answer: A

Explanation:
In a Layer 1 passive wireless site survey using a channel analyzer tool (such as Metageek Chanalyzer or Cisco Spectrum Expert) in the 2.4 GHz spectrum, the chart that indicates the ratio of interference present during the capture duration is the Duty Cycle chart. The duty cycle chart displays the percentage of time that detected energy - including both Wi-Fi and non-Wi-Fi signals - is present on each channel. A high duty cycle on a channel indicates that the channel is occupied by transmissions for a significant portion of time, reducing available airtime for Wi-Fi clients. This chart directly communicates the ratio of interference because it shows what fraction of the observation period had detectable RF energy above the noise floor. Signal strength charts show amplitude (how strong), while duty cycle charts show temporal occupancy (how often) - the latter is the correct metric for quantifying interference ratio. Reference: WLSD Study Guide - Layer 1 Spectrum Analysis, Duty Cycle Chart Interpretation, Spectrum Analyzer Methodology.

NEW QUESTION # 21
A stadium deployment requires maximum channel reuse across 300 APs in the 5 GHz band.
Which channel design should the engineer specify?

A. 40 MHz channel width with UNII-2 excluded
B. 160 MHz channel width with DFS channels enabled
C. 20 MHz channel width with DFS channels enabled
D. 80 MHz channel width with DFS channels disabled

Answer: C

Explanation:
In very high density environments, the dominant design constraint is the number of unique non- overlapping channels available for reuse, not the peak throughput of any single client. A 20 MHz channel width yields the largest number of distinct channels, which minimizes co-channel interference between the tightly spaced APs a stadium requires. Enabling DFS channels adds the UNII-2 and UNII-2 Extended bands, roughly doubling the available channel count in most regulatory domains and further improving the reuse pattern. Widening the channel to 40, 80, or
160 MHz has the opposite effect - each doubling of channel width halves the number of available channels, so an 80 MHz plan in a 300-AP venue guarantees that many APs share the same channel and contend for the same airtime. Disabling DFS or excluding UNII-2 discards channels the design cannot afford to lose.

NEW QUESTION # 22
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?

A. Create a mobility group between the two WLCs to allow auto-anchoring.
B. Enable AP groups using the same name on both WLCs for each group.
C. Enable 802.11r on each SSID on both WLCs to allow caching of the PMK.
D. Create an SSO cluster to ensure that client sessions sync between WLCs.

Answer: A

Explanation:
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.

NEW QUESTION # 23
A retail customer opened two new branch locations, and the main store HQ handles data center operations. Each branch location has three Cisco Catalyst 9130 APs. The data center has a Catalyst 9800 WLC with 18 Catalyst 9130 APs. Growing business and poor WAN uplinks cause impacted branch AP and wireless client connectivity back to HQ, and each branch location is now planned to have its own EWC controller based on C9130 AP to keep traffic local. This new design must accommodate: guests and employees sharing the same WLAN with different VLANs, guest uplink and downlink traffic restricted to 2 Mbps, and each branch acting as secondary or tertiary backup to another branch with the data center WLC always being the primary. Which design approach should the consulting engineer take?

A. Two C9130 branch APs must be converted to EWC mode, one for the active controller and the other for standby, with HQ WLC set as a primary N+1 backup, and other branches' EWC must be added as mobility peers. The branch WLAN will use the guest anchor to HQ WLC for guest VLAN access.
B. Two C9130 branch APs must be converted to EWC mode, one for the active controller and the other for standby, with the standby EWC set as N+1 backup. HQ AAA must be added to EWC, and WLAN with dot1x + AAA override must be configured.
C. One C9130 branch AP must be converted to EWC mode, and the preferred controller is set to that AP with HQ WLC set as a primary N+1 backup and other branches' EWC AP as secondary and tertiary. HQ AAA must be added to EWC, and WLAN with MAB + AAA override must be configured.
D. One C9130 branch AP must be converted to EWC mode, and the preferred controller is set to that AP with HQ WLC set as N+1 backup. The branch guest WLAN will use local web auth on guest VLAN.

Answer: C

Explanation:
This multi-constraint design scenario requires precise alignment of EWC architecture, N+1 redundancy hierarchy, AAA integration, and WLAN security policies. Option B correctly addresses all requirements. With only three APs per branch and a requirement to keep traffic local, converting a single C9130 to EWC mode is the correct and resource-efficient approach -- converting two APs to EWC (Options A and C) wastes AP capacity in a small three-AP branch.
The preferred controller set to the EWC AP ensures local APs join locally. The HQ WLC as primary N+1 backup satisfies the data center WLC always being primary requirement. Other branches' EWC APs configured as secondary and tertiary controllers creates the cross-branch redundancy hierarchy. Since guests and employees share the same SSID but require different VLANs, MAC Authentication Bypass (MAB) with AAA override allows the HQ ISE/AAA server to return VLAN attributes based on device or user identity -- dynamically assigning the correct VLAN at the policy level. The 2 Mbps guest rate limiting is applied through per-client QoS policies on the EWC. Option D's use of local web auth for guests does not enable dynamic VLAN assignment from AAA.

NEW QUESTION # 24
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