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| Section | Objectives |
|---|---|
| Troubleshooting and Validation | - Wireless performance troubleshooting methodologies - Validation tools and post-deployment testing |
| Wireless Site Survey and Requirements Analysis | - Business and technical requirements gathering - Physical environment assessment and constraints - Coverage and capacity planning |
| High Availability and Performance Optimization | - Redundancy design for controllers and APs - Load balancing and RF optimization |
| RF Fundamentals and Design Principles | - RF behavior and propagation - Channel planning and interference mitigation - Antenna types and placement strategies |
| Wireless Security Design | - 802.1X authentication and RADIUS integration - WPA2/WPA3 enterprise security design - Guest access and segmentation strategies |
| Cisco Wireless Architecture | - Lightweight Access Point (LAP) deployment models - Mobility groups and roaming design - Controller-based architecture (WLC) |
300-110 考古題覆蓋了最新的考試指南，確保考生一次性通過 300-110 考試。Cisco 認證專家根據 300-110 考試主題編訂，適合全球的考生使用，提高考生的通過率。CCNP Wireless 是一張高級網路專家認可證書，亦是全球公認的專業認證。300-110 認證主要的目的是讓網路工程師能在現今變化迅速的資訊網路環境中，都能掌握和擁有最先進的網路技術，任何時候都能保持領導地位。
問題 #104
An engineer is designing a wireless network for a facility located 3 km from an airport with a terminal Doppler weather radar installation. Which design consideration applies to the 5 GHz channel plan?
答案：C
解題說明：
Dynamic Frequency Selection is a regulatory requirement that obligates a Wi-Fi device operating on affected 5 GHz channels to detect radar signals and vacate the channel within a defined interval, then remain off that channel for a non-occupancy period of 30 minutes. When this occurs, the AP moves to a new channel and associated clients must re-associate, producing a brief but real service interruption. Near an airport with terminal Doppler weather radar, the probability of these events is materially higher, so the engineer must weigh the additional channel capacity DFS provides against the risk of periodic disruption - often excluding the channels closest to the radar's operating frequency for latency-sensitive SSIDs while retaining the rest.
DFS channels cannot be locked against radar-triggered changes, since compliance is mandatory.
DFS does not confer higher transmit power, and radar detection applies to UNII-2 and UNII-2 Extended, not UNII-1.
問題 #105
During a site survey for a new wireless deployment in a multifloor office building, an engineer must identify sources of interference and ensure optimal AP placement for 5 GHz coverage.
While walking the site with a spectrum analyzer, the engineer notices periodic spikes in the noise floor on several channels and inconsistent signal strengths reported by the survey tool, despite visually unobstructed paths. Which action must the engineer take next to accurately assess and mitigate the Layer 1 interference?
答案：C
解題說明：
Layer 1 interference analysis is foundational to the Cisco site survey methodology. When a spectrum analyzer reveals periodic noise floor spikes across multiple channels with no clear line- of-sight obstruction, the root cause is almost certainly a non-802.11 device -- candidates include cordless phones, video cameras, microwave equipment, or radar systems triggering DFS events.
The correct engineering response is systematic documentation: capture the time of occurrence, the specific frequency or frequency range, and the geographic location of the interference signature. This triangulation data enables correlation with physical devices present in the facility.
問題 #106
A customer is planning to replace older access points with Cisco 4800 Series Access Points.
Unaware of the infrastructure requirements, the client has an engineer investigate the inline power requirement. Which IEEE 802.3 standard complies with the Cisco 4800 Series Access Points?
答案：B
解題說明：
The Cisco Aironet 4800 Series Access Point is a tri-radio, high-performance access point designed for high-density environments. It draws significantly more power than older dual-radio APs and requires IEEE 802.3bt (also known as PoE++), which provides up to 90W per port at the Power Sourcing Equipment. IEEE 802.3af (Type 1 PoE) delivers only 15.4W and 802.3at (Type 2 PoE+) provides up to 30W -- both are insufficient for full functionality of the 4800 series. The dedicated third security radio on the 4800 pushes the power budget beyond what 802.3at can reliably support. IEEE 802.3ac is a VLAN tagging standard entirely unrelated to Power over Ethernet. Engineers designing wired infrastructure for Cisco 4800 deployments must ensure switches support 802.3bt Type 3 or Type 4 to guarantee full AP functionality across all three radios simultaneously.
問題 #107
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?
答案：B
解題說明：
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. Reference: WLSD Study Guide
- EWC Architecture, N+1 Redundancy Hierarchy, AAA Override and Dynamic VLAN Assignment.
問題 #108
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.)
答案：A,E
解題說明：
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.
問題 #109
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