Practice Free JN0-452 Exam Online Questions
An IT team at a university is trying to resolve complaints from students who say it takes too long to connect to Wi-Fi. The admin checks the Mist dashboard and finds that the **Time to Connect SLE** is consistently above 4 seconds.
Which tool or capability should they use to identify the exact failure step in the client process?
- A . AP Health Metrics
- B . RRM Power Analysis
- C . Client Journey Timeline
- D . DHCP Server Logs
C
Explanation:
The Client Journey Timeline allows admins to trace each step in a client’s connection attempt―association, authentication, DHCP, DNS―and see where delays occur. It’s the most efficient way to troubleshoot SLE issues like long connection times.
Which two actions taken by Marvis Reactive Troubleshooting rely on correct LLDP information from wired switches? Choose two.
- A . Identifying “Bad‑cable” issues between AP and switch
- B . Suggesting PoE power budget re‑allocation
- C . Locating the client’s wired uplink path for roaming analysis
- D . Triggering “AP Offline” immediate alert
- E . Analysing switch queue drops causing Latency SLE hits
A, B
Explanation:
Marvis uses LLDP to detect cabling faults and confirm PoE provisioning. Client path mapping uses MAC tables, alerts rely on heartbeat loss, and queue analysis uses telemetry, not LLDP.
What is a key function provided by Mist Webhooks?
- A . Launch virtual SSIDs on-demand
- B . Poll client status periodically via SNMP
- C . Automate monthly license renewals via cloud
- D . Notify external systems in real-time about events like AP disconnections
D
Explanation:
Webhooks in Mist provide real-time event notifications (e.g., AP offline, client connect failure, SLE violations) to external platforms like Slack, ServiceNow, or SIEM systems.
A retail chain uses Mist’s LBS features to show promotions on a mobile app when customers enter the electronics zone. Recently, no promotions are appearing for users, despite BLE and Wi-Fi being enabled on their phones.
What should the admin check first?
- A . Whether the zone is using WPA3 Enterprise
- B . Whether the app has location and Bluetooth permissions enabled
- C . Whether DHCP leases are expiring too quickly
- D . Whether the Wi-Fi APs support 2.4 GHz
B
Explanation:
Location-based promotions rely on the **mobile app detecting BLE broadcasts**. Without proper permissions (especially on iOS), the app **won’t be able to receive or act on location data**.
A client is consistently trying to connect to the Mist WLAN but fails during authentication.
Which built-in Mist troubleshooting tool can provide a step-by-step view of where the failure is occurring?
- A . Historical SLE Summary
- B . RF Spectrum Analyzer
- C . Audit Log Viewer
- D . Client Journey Timeline
D
Explanation:
The Client Journey Timeline visually shows each step of the connection (association, auth, DHCP, DNS) and flags where a failure occurs.
What is the role of OFDM (Orthogonal Frequency Division Multiplexing) in Wi-Fi communication?
- A . Encrypts Wi-Fi frames for security
- B . Enables clients to roam between APs quickly
- C . Allows multiple subcarriers to transmit data simultaneously
- D . Converts analog signals to digital
C
Explanation:
OFDM divides a high-speed signal into multiple slower subcarriers, each carrying part of the data in parallel. This improves performance and resistance to interference in Wi-Fi communication.
Which two client metrics most influence the Mist Capacity SLE algorithm? Choose two.
- A . Airtime utilisation per AP radio
- B . Average TCP goodput per client
- C . Collision percentage on uplink
- D . Average SNR per client
- E . Beacon corruption rate
A, B
Explanation:
Airtime and goodput are core capacity indicators; collisions feed reliability, SNR feeds coverage, beacon errors are minor.
Which of the following best describes the deployment benefit of Mist vBLE compared to traditional Bluetooth beacons?
- A . Mist vBLE does not require physical beacon installation
- B . vBLE requires manual battery replacement
- C . Traditional beacons can be configured from the cloud
- D . Mist vBLE only supports proximity-based triggers
A
Explanation:
Mist vBLE is embedded into Mist APs, eliminating the need to manually deploy and manage battery-powered BLE beacons.
A Mist AP is running Marvis Minis. One test shows that DNS lookup fails, and the portal page doesn’t load.
What is most likely true?
- A . The client SNR is too low
- B . The AP needs reboot
- C . The user password is incorrect
- D . The captive portal or DNS server is misconfigured
D
Explanation:
Marvis Minis simulate client connections; failure in DNS and portal page access indicates issues in DNS settings or captive portal configuration.