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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Wireless Infrastructure Design | 30% | - Wired-wireless integration design
|
| Topic 2: WLAN High Availability and Security Design | 20% | - High availability design
|
| Topic 3: Wireless Site Survey | 25% | - Design requirements collection and constraint evaluation
- Pre-deployment survey and validation - Layer 1 site survey execution and analysis |
| Topic 4: Mobility Design | 25% | - Mobility architecture models
- Roaming optimization
|
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질문 # 68
An engineer is designing a WLAN for a 4000-seat auditorium where a single SSID must behave differently than the same SSID elsewhere on campus. Which design construct allows different RF and WLAN parameters to be applied to the auditorium APs only?
정답：A
설명：
An AP group is a logical collection of APs that allows a specific set of WLANs, interfaces, and settings to be applied to just those APs, and an RF profile attached to that AP group allows band- specific RF parameters - such as minimum mandatory data rates, TPC power thresholds, RRM channel and power ranges, client limits, and coverage hole thresholds - to be applied only to that group. This combination is exactly what a high-density venue requires, because an auditorium needs higher minimum data rates, reduced transmit power, and narrower channel widths than the general campus while still broadcasting the same SSID. A mobility group defines the set of controllers that exchange client context to support seamless roaming, and an RF group defines the set of controllers and APs that share RRM calculations under a common group leader - neither applies per-AP WLAN parameters. FlexConnect groups are used to manage branch APs performing local switching and are not relevant to a campus auditorium.
질문 # 69
A company is upgrading its wireless infrastructure and is in a state of transition. Some parts of the company's building still run on the legacy WLC. The new WLC is not located at the same site as the legacy WLC. The company requires seamless client inter-controller roaming between the new WLC and the legacy WLC, with no disruptions. Both WLCs are separated by firewalls. Which troubleshooting command validates that the mobility control packets between the WLCs can be sent and received?
정답：A
설명：
The command 'debug mobility handoff enable' is used to validate the mobility control packets between Wireless LAN Controllers (WLCs). This command enables debugging of the handoff process, which is critical for ensuring seamless client roaming between controllers. When WLCs are separated by firewalls, it is essential to confirm that mobility control packets can traverse these firewalls without being dropped or rejected. The 'debug mobility handoff enable' command allows network administrators to monitor the handoff process in real time and identify whether mobility PDUs are being exchanged successfully. If mobility control packets are being blocked by the firewall, this debug output will show failures in the handoff sequence. This command directly validates bidirectional mobility traffic flow, making it the correct troubleshooting tool for the scenario described.
질문 # 70
A customer has a single anchor WLC named Anchor A.
Anchor A is in a DMZ and provides guest access. The customer wants to deploy an additional anchor controller named Anchor B to provide redundancy if Anchor A fails. Which design approach should be taken for the guest WLAN priority on the foreign WLC for each anchor WLC?
정답：D
설명：
In a wireless network design where anchor redundancy is required for guest access, setting different priorities for the anchor controllers ensures deterministic primary and backup behavior.
Cisco anchor priority uses a lower numerical value to indicate higher preference -- Priority 1 is the highest priority (most preferred) anchor, and Priority 3 is lower priority.
Setting Anchor A to priority 1 (Option D) makes it the primary anchor controller -- all new guest client sessions will preferentially anchor to Anchor A.
Setting Anchor B to priority 3 makes it the standby anchor -- guest clients will only be anchored to Anchor B when Anchor A is unavailable. This creates a clear primary/backup relationship with deterministic failover.
질문 # 71
A stadium deployment requires maximum channel reuse across 300 APs in the 5 GHz band.
Which channel design should the engineer specify?
정답：A
설명：
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.
질문 # 72
An enterprise is using wireless as the main network connectivity for clients. To ensure wireless network availability, two standalone controllers are installed in the head office. APs are connected to the controllers using a round-robin approach to load balance the traffic. After a power cut, the wireless clients disconnect while roaming. An engineer tried eping from the controller but fails.
Which protocol needs to be allowed between the networks that the controllers are installed?
정답：B
설명：
When eping (EoIP ping) fails between two Cisco Wireless LAN Controllers, it indicates that the data path of the mobility tunnel is blocked. In Cisco AireOS wireless networks, the mobility data path uses IP Protocol 97 (EtherIP -- Ethernet-over-IP encapsulation) for tunneling client traffic between the anchor and foreign controllers. This is distinct from the control path, which uses UDP port 16666. When the mobility data path (IP Protocol 97) is blocked by a firewall or ACL between the two controllers' networks, eping will fail because eping specifically tests the EoIP data encapsulation path. After a power cut, when clients disconnect and attempt to roam between APs on different controllers, the mobility tunnel must be operational for session continuity. If IP Protocol 97 is blocked, the mobility data plane cannot function, causing client disconnections during inter- controller roaming events. The other IP protocols listed (67, 77, 87) are not used for Cisco WLC mobility tunneling.
질문 # 73
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