Refer to the exhibit.A WLC is deployed at a branch location to facilitate secure client connectivity. A network engineer configures one WLAN using WPA2 Personal passphrase and activates ASCII format key to align with company security policies.Which configuration enables client authentication for this WLAN?
Answer(s): D
WPA2-Personal authenticates clients with a preshared key, not with 802.1X. Cisco documents WPA/WPA2 as supporting multiple authentication methods, including 802.1X and PSK, and specifically states that when PSK is selected, a preshared key or passphrase must be configured. The configuration element that enables client authentication in this scenario is the PSK ASCII key function represented by optionD. On Catalyst 9800 IOS XE, the PSK method is enabled with PSK authentication key management, and the passphrase is defined with security wpa psk set-key {ascii | hex} {0 | 8} password; Cisco’s example is security wpa psk set-key ascii 0 test.Option A disables 802.1X AKM, which is appropriate for Personal mode, but it does not by itself authenticate clients. Option B controls DHCP proxy behavior and has no role in WPA authentication. Option C enables AES for WPA2 encryption, which protects traffic confidentiality but does not supply the authentication secret. Reference topics: Client Connectivity Configuration — WPA2-Personal, PSK authentication, AKM selection, AES encryption, and Catalyst 9800 WLAN security configuration.
A wireless administrator must configure detailed and comprehensive monitoring for client devices across branch locations. The team wants to streamline operations for faster response during performance degradation. To support the organization's growth, the administrator needs a centralized reporting platform that displays aggregated data.Which solution must the administrator use to monitor the clients in the network?
Answer(s): B
Cisco Catalyst Center Assurance is the correct solution because the requirement is centralized, scalable, multi-site client monitoring with aggregated health and troubleshooting data. Cisco states that Catalyst Center Assurance provides a Client health dashboard and supports both wired and wireless clients. It is specifically used to obtain a global view of all client device health and determine whether issues require action.This directly matches the need for monitoring clients across branch locations and responding faster during performance degradation. Catalyst Center Assurance also provides location-based visibility, health scoring, client trend analysis, onboarding failure reasons such as AAA or DHCP, and Client 360 views for detailed troubleshooting. Cisco documents that Client 360 provides detailed client connectivity troubleshooting, including what problem occurred, when it occurred, why it occurred, and whether the impact is isolated or widespread. Cisco’s Catalyst Center data sheet further describes Network and Client Health dashboards as giving administrators a high-level overview of every network device and client, with expansion by geographical site, device list, client list, or topology. Syslog, WLC CLI logging, and a local WLC dashboard are useful operational tools, but they do not provide enterprise-scale assurance analytics. Reference topics: Wireless Monitoring and Management — Catalyst Center Assurance, Client Health, Client 360, centralized wireless monitoring, and operational analytics.
What is a benefit of network adaptability in terms of improved operational outcomes when using AI-RRM in Cisco Catalyst Center?
The correct answer is reduction of co-channel interference. AI-RRM in Cisco Catalyst Center is designed for RF optimization, not IP addressing, software scheduling, or user identity classification. Cisco describes AI-enhanced RRM as applying artificial intelligence and machine learning to optimize RF environments and automate/adapt RF parameter tuning for Cisco wireless networks. This is directly tied to operational RF outcomes such as improved channel planning, transmit power behavior, channel width decisions, and better spectrum utilization.Co-channel interference occurs when multiple AP radios operate on the same channel within hearing range, forcing devices to share airtime and increasing contention. AI-RRM uses telemetry, analytics, and learned RF behavior to recommend or apply more optimal RF configurations. Cisco specifically states that AI-enhanced RRM optimization can produce improvements such as up to a 40 percent reduction in co-channel interference and SNR gains for wireless clients. Cisco’s AI-RRM deployment guidance also identifies AP radio distribution and utilization analysis as critical for minimizing co-channel interference and optimizing wireless performance.Therefore, option B is the only operational outcome aligned with AI-RRM’s purpose. Reference topic: Automation and AI — Cisco Catalyst Center AI-RRM, RF analytics, RRM automation, channel optimization, and wireless AIOps.
Refer to the exhibit.A network administrator is working on a WLC to enable user access for contractor desktops using WPA2-Enterprise using EAP-TTLS. The administrator verified the external authentication configuration and now must test network connectivity.Which code snippet must be added to the box in the code to complete the configuration on the WLC that supports authentication with an external server?
Answer(s): A
The missing command must create the RADIUS server group context before the existing server name external-radius command can bind the defined RADIUS server into that group. Cisco’s Catalyst 9800 802.1X configuration workflow shows the exact CLI sequence: define the RADIUS server, then enter aaa group server radius <radius-grp-name>, then add server name <radius-server-name>. The Catalyst 9800 configuration guide likewise states that the RADIUS server-group identification is created with aaa group server radius server-group, followed by the server name assignment.In this exhibit, external-radius is already declared under radius server, and aaa authentication dot1x CLIENT_GROUP group RADIUS-GRP already points the 802.1X method list to the server group namedRADIUS-GRP. Therefore, the box must contain aaa group server radius RADIUS-GRP so that server name external-radius is syntactically valid and functionally associates the external server with the group. Cisco also identifies dot1x authentication lists as the AAA method type used for 802.1X SSIDs, with “group” directing authentication to an external RADIUS server. Reference topics: Client Connectivity Configuration — WPA2-Enterprise, 802.1X/EAP, AAA method lists, RADIUS server groups, and Catalyst 9800 WLAN security
What defines device sensitivity in a wireless environment?
Device sensitivity in a wireless environment refers to receiver sensitivity: the minimum RF signal level a client or AP radio must receive to successfully detect, demodulate, and decode a transmission. Cisco defines receiver sensitivity as the minimum signal power level, expressed in dBm or mW, required for a receiver to accurately decode a given signal. Cisco RF design guidance further states that sensitivity indicates the lowest received power before the receiver considers the signal unintelligible.Therefore, option A is correct because sensitivity is fundamentally about the radio’s capability to process a received signal at low power levels. A more sensitive receiver can decode weaker frames, improving effective coverage and receive performance, provided the signal-to-noise ratio and interference conditions remain acceptable. Cisco also notes that individual device sensitivity determines how well a device can hear and demodulate RF energy, which directly affects contention behavior and WLAN performance in dense environments. Redundant gateways, beacon interval synchronization, and key refresh schedules are Layer 3 availability, 802.11 timing, and security-key management topics; they do not define RF receiver sensitivity. Reference topics: RF Fundamentals — receiver sensitivity, RSSI, dBm, SNR, demodulation, and WLAN coverage behavior.
Refer to the exhibit.A wireless controller is deployed at a branch location to facilitate guest client connectivity. A network engineer configures one WLAN using Web authentication and activates web-based method to align with company security policies.Which configuration enables client authentication for this WLAN?
The command that enables web-based client authentication on the WLAN is security web-auth. Cisco’s Catalyst 9800 Web-Based Authentication guide shows the WLAN configuration workflow: enter WLAN configuration mode, disable WPA security for the open Layer 2 guest WLAN, then “Enable web authentication for WLAN” using security web-auth. Cisco then applies the authentication list and parameter map with security web-auth authentication-list ... and security web-auth parameter-map ..., which refine the WebAuth method and portal behavior after WebAuth itself is enabled.Cisco’s LDAP authentication example mirrors the exhibit exactly: wlan webauth 2 webauth, removal of WPA/802.1X Layer 2 security, security web-auth, security web-auth authentication-list ldapauth, and security web-auth parameter-map global. Option B only creates or enters the WLAN profile with WLAN ID 2 and SSID name. Options C and D disable WPA2 and 802.1X AKM; they do not authenticate clients. Reference topics: Client Connectivity Configuration — guest WLAN authentication, WebAuth, Layer 3 security, authentication lists, parameter maps, and Catalyst 9800 WLAN security configuration.
Which Cisco technology leverages machine learning methods and a cloud learning platform that helps to identify critical issues?
The correct Cisco technology is AI Network Analytics. Cisco describes Cisco AI Network Analytics as a Catalyst Center capability that uses machine learning and machine reasoning to generate deployment-specific insights, identify operational issues, and accelerate troubleshooting. Cisco’s official Catalyst Center Assurance documentation states that Cisco AI Network Analytics uses advanced machine learning techniques and an advanced cloud learning platform with deidentified network event data to identify critical issues in the network.This makes option D the only precise match. Catalyst Center Assurance is the broader assurance and monitoring framework where AI Network Analytics is surfaced, but it is not the specific technology named in the question. Network Services is a generic platform function area, not the AI/ML analytics feature. Catalyst Center LLM Insights is not the established Cisco wireless assurance feature associated with cloud-based machine learning for issue detection. AI Network Analytics provides AI-driven baselining, anomaly detection, root-cause assistance, trends, insights, and comparative benchmarking. Cisco also documents that the AI Network Analytics cloud runs machine learning models using deidentified network event data and returns issues and insights back into Catalyst Center. Reference topics: Automation and AI — Cisco Catalyst Center, AI Network Analytics, AI-driven baselining, anomaly detection, and wireless assurance intelligence.
What does an elevated noise floor indicate in an RF environment?
An elevated noise floor indicates degraded RF conditions and directly reduces wireless link reliability. Cisco defines the noise floor as the ambient RF noise level, expressed in dBm, below which received signals are unintelligible. Cisco also defines SNR as the ratio of signal strength to the noise floor, meaning that when the noise floor rises, the usable separation between the desired signal and background RF energy decreases.For a receiver to decode frames reliably, the received signal must remain sufficiently above the noise floor. Cisco site-survey guidance states that RF signals must be higher than the noise floor to be detectable as valid useful signals, and gives the common design example of -67 dBm signal with a -92 dBm noise floor to maintain 25 dB SNR.When the noise floor is elevated, SNR drops, clients experience more retries, lower modulation rates, reduced throughput, and possible disconnects. Cisco’s high-density wireless guidance states that raised noise floor lowers SNR, translating to lower speeds and higher airtime utilization. Options B, C, and D describe unrelated timing, spectrum-planning, or bandwidth-demand concepts. Reference topics: RF Fundamentals — noise floor, SNR, RSSI, RF interference, retries, and wireless link quality.
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