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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Mobility Design | 25% | - Mobility architecture models
|
| Topic 2: Wireless Infrastructure Design | 30% | - High-density wireless design
|
| Topic 3: WLAN High Availability and Security Design | 20% | - High availability design
|
| Topic 4: Wireless Site Survey | 25% | - Layer 1 site survey execution and analysis - Design requirements collection and constraint evaluation
- Pre-deployment survey and validation |
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NEW QUESTION # 50
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?
Answer: B
Explanation:
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, which has a dedicated third scanning radio that requires the additional power budget provided by 802.3bt. IEEE 802.3ac is a standard related to VLAN tagging and is 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. Reference: WLSD Study Guide - Wired Infrastructure Design, PoE Standards and Power Budget Planning, Cisco 4800 Series AP Specifications.
NEW QUESTION # 51
A wireless engineer is designing a wireless network for a warehouse using access points with internal antennas. Which two elements have a negative effect on the wireless users? (Choose two.)
Answer: A,C
Explanation:
In a warehouse setting, two elements with a significant negative effect on wireless performance are AP height and absorption. AP height (Option B) is critical because warehouses often have very high ceilings (25-45 feet). When APs with internal (omnidirectional) antennas are mounted too high, the signal propagates primarily in the horizontal plane and the path loss to floor-level worker devices becomes excessive.
Additionally, metal shelving between the AP and users further attenuates the already weak signal at high mounting heights. Absorption (Option E) is a major challenge in warehouses because the inventory stored on metal racks, particularly liquid goods, dry goods in cardboard, and dense materials, absorbs RF energy significantly. Metal racking causes both absorption and reflection, creating RF shadows and multipath environments that degrade connection quality. Wireless channels (Option A) are a design parameter, not an environmental impediment. Client authentication (Option C) and authorization (Option D) are network security processes unrelated to RF propagation quality. Reference: WLSD Study Guide - Warehouse Wireless Design, AP Height Considerations, RF Absorption in Industrial Environments.
NEW QUESTION # 52
A customer is migrating from a legacy Cisco AireOS WLC to a new Cisco 9800 IOS XE WLC with Cisco 9100 APs. The new APs must associate to the Catalyst 9800 WLC, and wireless clients must seamlessly roam between the old and new WLCs even during SSO. The new Catalyst 9800 WLC deployment is configured to use SSO. Which command must be added to meet the requirements?
Answer: C
Explanation:
In a mixed deployment where a Cisco Catalyst 9800 IOS XE WLC operating in SSO is required to establish a mobility peer relationship with a legacy AireOS WLC, the critical configuration requirement is that the 9800 SSO pair presents a single, consistent mobility MAC address to all peer WLCs. When the 9800 is in SSO mode, the active and standby controllers function as a single logical entity, but AireOS WLCs identify mobility peers by MAC address. If the MAC address changes during an SSO switchover, the AireOS peer will detect the change and tear down the mobility tunnel, disrupting inter-controller client roaming. The command 'wireless mobility mac-address <MAC>' configures a static, persistent mobility MAC address on the 9800 SSO pair that remains constant regardless of which physical unit is active. This ensures the AireOS WLC always identifies the 9800 pair by the same MAC address, maintaining the mobility tunnel and enabling seamless client roaming.
NEW QUESTION # 53
A wireless consultant must design a Cisco WLAN. The consultant recommends a solution that requires 12 Cisco 9100 Series APs connected to a Cisco 3800 Series PoE+ switch. Each AP requires PoE+ for full functionality. What is the total PoE requirement in watts?
Answer: D
Explanation:
This question requires a straightforward PoE power budget calculation. The IEEE 802.3at standard (PoE+) delivers a maximum of 30W at the Power Sourcing Equipment (PSE/switch port). Cisco 9100 Series access points such as the C9120, C9130, and C9136 are designed to operate with full functionality using PoE+ at 30W per AP. The total PoE power requirement for 12 APs is calculated as:
12 APs ?30W per AP = 360W. This figure represents the total power draw that the Cisco 3800 Series PoE+ switch must be capable of supplying across the connected AP ports simultaneously.
The Cisco Catalyst 3800 Series switches offer a total PoE power budget that must be validated against this 360W requirement during the design phase.
Note that some Cisco 9100 APs support higher power modes through IEEE 802.3bt (PoE++), which can provide up to 90W -- but the question specifies PoE+ (802.3at) for the switch infrastructure, making 30W ?12 = 360W the correct answer. Option D (720W) would correspond to 24 APs at 30W each.
NEW QUESTION # 54
An engineer is designing a wireless network in a historic building that has large rooms and ornate wall coverings. Which approach must be considered first when placing access points?
Answer: D
Explanation:
When designing a wireless network for any environment, including a historic building with ornate wall coverings and aesthetic constraints, RF coverage must always be considered first when placing access points.
RF coverage is the fundamental requirement - without adequate signal strength throughout the space, no other design objective can be met. The engineer must first determine AP locations that provide the required signal strength and coverage to all areas before addressing aesthetics, overlap calculations, or interference mitigation. In a historic building specifically, the ornate wall coverings and dense construction materials may cause unexpected signal attenuation, making it even more important to model RF coverage before committing to AP positions. Once RF coverage requirements are established, aesthetic concerns (Option A) can guide the choice of AP form factor, enclosures, or cabling routes. Cell overlap (Option C) is derived from coverage calculations. RF interference (Option D) analysis follows after RF coverage baseline is established.
Reference: WLSD Study Guide - Site Survey Methodology, AP Placement Priority, Special Environment Wireless Design.
NEW QUESTION # 55
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