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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Mobility Design | 25% | - Roaming optimization
- Mobility architecture models
|
| Topic 2: Wireless Site Survey | 25% | - Pre-deployment survey and validation - Layer 1 site survey execution and analysis - RF propagation and attenuation analysis - Design requirements collection and constraint evaluation
|
| Topic 3: Wireless Infrastructure Design | 30% | - Wired-wireless integration design
|
| Topic 4: WLAN High Availability and Security Design | 20% | - Security architecture design
- High availability design
|
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質問 # 39
An engineer is designing a FlexConnect deployment for 40 remote branch offices, each with a 10 Mbps WAN circuit back to a central Catalyst 9800 WLC. Which design consideration must be validated before deployment?
正解：A
解説：
FlexConnect is designed specifically for branch deployments where APs are separated from the controller by a WAN link. Cisco supports a maximum round-trip time of 300 ms between the FlexConnect AP and the WLC, which accommodates the latency typical of terrestrial WAN and even some satellite links. This tolerance is possible because in FlexConnect local switching mode, user data is bridged directly onto the local branch VLAN and never traverses the WAN - only CAPWAP control traffic crosses the link. The 20 ms figure applies to centrally switched CAPWAP designs in a campus, where all client data is tunneled to the controller and latency directly impacts user traffic. Deploying a local WLC at every branch defeats the cost model that FlexConnect exists to address, and forcing central switching would push all branch user traffic across the 10 Mbps circuit, saturating it.
質問 # 40
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?
正解：D
解説：
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.
質問 # 41
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?
正解：B
解説：
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.
質問 # 42
A customer has two Cisco Catalyst 9800 Series WLCs named WLC-A and WLC-B in an N+1 configuration with the same WLANs but different Layer 3 interfaces for each WLC, and APs in local mode. WLC-A manages Building A APs and WLC-B manages Building B APs. The customer wants users to remain connected and retain their session state including the IP address when moving between buildings. How must this requirement be incorporated into the design?
正解：C
解説：
The requirement for users to retain their session state 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 a mobility tunnel between WLC-A and WLC-B with both controllers configured in the same mobility group name -- the group name is the trust identifier that permits the mobility tunnel and anchor- foreign relationship to form. Without the same group name, the controllers will not form a trusted mobility peer relationship.
質問 # 43
An engineer is implementing a wireless design for a manufacturing company with a Catalyst
9800, a stack of two Catalyst 9300-48HX switches, and 9166 APs. Each AP must be named using the Zone-053424189-01X string where X is the area number. The engineer needs to connect the APs to the switch stack using PoE. How many APs must the engineer connect to the stack so that they run with full functionality?
正解：A
解説：
The Cisco Catalyst 9300-48HX is a high-density PoE switch specifically designed for Cisco Catalyst 9100 Series AP deployments. The 48HX variant features 48 Multi-Gigabit PoE ports with IEEE 802.3bt (PoE++) support, providing up to 90W per port. The Cisco 9166 Access Point is a Wi-Fi 6E AP that requires IEEE 802.3bt (PoE++) power to achieve full radio functionality -- enabling all three radios including the 6 GHz radio. In a two-switch stack of 48HX units, the total PoE budget is designed and rated to support full-port utilization with Cisco 9100 series APs simultaneously. The design intent is to connect APs to all ports on all switches -- maximizing the deployment density and ensuring every AP runs with full functionality. Connecting to only half the ports on one switch (Option B), half of each switch (Option C), or all ports on only one switch (Option D) would underutilize the infrastructure and fail to achieve the full deployment density that the switch stack was architected to deliver. The AP naming scheme requiring sequential area numbering requires all APs to be connected and fully operational across the entire stack.
質問 # 44
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