Practice Free JN0-750 Exam Online Questions
A Network Architect is designing a "closed-loop" automation workflow. The requirement is that when Marvis detects a "Bad Cable" for a switch port, a notification is immediately pushed to a system that will automatically create a trouble ticket.
Which Mist automation tool or feature is the trigger for this event-driven workflow?
- A . Webhooks
- B . `mist-cli`
- C . REST API Polling
- D . Terraform
A Network Administrator is creating a standardized set of variables for their Ansible playbooks that automate Mist configurations. The variables are stored in a file named `vars.yml`.
A snippet of the file is as follows:
“`
site_details:
– name: "HQ-Site"
address: "1 Corporate Drive"
timezone: "America/New_York"
– name: "Branch-Site"
address: "200 Business Park"
timezone: "America/Chicago"
“`
What data structure format is being used in this file?
- A . XML
- B . YAML
- C . Jinja2
- D . JSON
A Network Administrator is using the Mist API to automate the generation of a performance report. They need to retrieve the same data that is shown on the "Application Insights" dashboard for a site.
Which family of API endpoints should the administrator’s script query?
- A . The `/sites/{site_id}/settings` endpoint.
- B . The `/audits` endpoints.
- C . The `/sites/{site_id}/insights` endpoints.
- D . The `/sites/{site_id}/stats` endpoints.
SCENARIO START
Scenario Title: Troubleshooting 802.1X Authentication with Mist Access Assurance
Scenario Description:
A Network Administrator is troubleshooting a widespread issue where corporate users are unable to connect to the main wired and wireless networks, which are secured with 802.1X. The authentication is handled by a central RADIUS server, and the policy is enforced by Juniper Mist Access Assurance. The issue started intermittently but is now affecting all users.
Technical Context:
– Authentication: WPA2-Enterprise (wireless) and 802.1X (wired).
– Authenticator: Juniper APs and EX Switches.
– Authentication Server: A central RADIUS server (`10.100.1.50`).
– Mist Policy: An Access Assurance policy is configured with the RADIUS server’s IP and a shared secret. It has a single rule to assign the "Corporate-User" role upon successful 802.1X authentication.
– Symptoms:
– The Mist dashboard shows a huge spike in "Authentication Failures" on the Time to Connect SLE.
– The Marvis Actions page has a critical action: "Authentication Failure – RADIUS Server Unreachable."
– The RADIUS server’s own logs show no incoming requests from any of the Mist authenticators.
Supporting Data:
A snippet of the Marvis Action details:
– Failure Type: RADIUS Server Unreachable
– Affected Devices: All APs and Switches at Corporate-HQ
– Impacted Clients: 583 clients
– Recommendation: "Verify connectivity between the authenticators (APs/Switches) and the RADIUS server `10.100.1.50`. Check for any intervening firewalls or network reachability issues."
SCENARIO END
Based on the scenario and supporting data, what is the most likely root cause of the widespread authentication failures?
- A . A network connectivity issue, such as a firewall rule change or a routing problem, is preventing the Mist authenticators (APs and switches) from reaching the RADIUS server.
- B . Users are entering the wrong passwords for their accounts.
- C . The shared secret configured in the Mist Access Assurance policy is incorrect.
- D . The SSL certificate on the RADIUS server has expired.
An Automation Developer needs to retrieve the raw data points that Mist uses to calculate the "Coverage" SLE for a specific client. They want to see the client’s RSSI, SNR, and data rate over the past hour.
Which Mist automation tool is designed to stream this type of detailed, real-time telemetry?
- A . The WebSocket API, by subscribing to the client’s telemetry channel.
- B . The REST API endpoint `GET /api/v1/sites/{site_id}/clients/{client_mac}`.
- C . The Audit Logs.
- D . A Webhook subscribed to the `client-events` topic.
An Automation Developer wants to create a proactive alert. The goal is to trigger a Webhook if the "Coverage" SLE for any AP at a specific site drops below 80% for more than 30 minutes.
What is the most efficient way to create this Day 2 automation?
- A . Configure an Alert Template in the Mist UI with the trigger set to a "Wireless SLE" event, specifying the Coverage metric and the threshold.
- B . Write a Python script that polls the `/api/v1/sites/{site_id}/stats/devices` endpoint every minute and implements the logic locally.
- C . Use a Webhook subscribed to the `device-stats` topic to stream all raw AP statistics to an external analysis engine.
- D . Use Marvis to ask "Which APs have bad coverage?".
A Guest User Manager is onboarding a new EX switch for a teleworker. Their automated script needs to claim the switch, assign it to a site, and then configure a specific port with a voice VLAN.
What is the correct order of operations?
- A . 1. Assign to site -> 2. Claim switch -> 3. Configure port
- B . 1. Configure port -> 2. Assign to site -> 3. Claim switch
- C . 1. Configure port -> 2. Claim switch -> 3. Assign to site
- D . 1. Claim switch -> 2. Assign to site -> 3. Configure port
A Guest User Manager is onboarding a new EX switch for a teleworker. Their automated script needs to claim the switch, assign it to a site, and then configure a specific port with a voice VLAN.
What is the correct order of operations?
- A . 1. Assign to site -> 2. Claim switch -> 3. Configure port
- B . 1. Configure port -> 2. Assign to site -> 3. Claim switch
- C . 1. Configure port -> 2. Claim switch -> 3. Assign to site
- D . 1. Claim switch -> 2. Assign to site -> 3. Configure port
A Network Administrator is setting the performance goals for their wired network. They want to ensure that the uplink ports on their EX switches are not becoming a bottleneck.
Which Wired Assurance SLE and threshold should they configure to monitor this?
- A . `Connection` SLE, with a threshold for STP flaps.
- B . `Roaming` SLE, with a threshold for high latency.
- C . `Switch Health` SLE, with a threshold for CPU utilization.
- D . `Throughput` SLE, with a congestion threshold (e.g., 90% utilization).
A Helpdesk Technician wants to create a simple notification system. The goal is to receive an email whenever a Marvis Action of "critical" severity is generated for any site in the organization.
Which features of the Mist platform must be used in combination to create this workflow? (Select all that apply.)
- A . An Alert Template configured to trigger on Marvis Actions with the specified severity.
- B . A Webhook configured to listen to the `alerts` topic.
- C . A WxLAN policy with an "Alert" action.
- D . An email-forwarding service that can be triggered by an HTTP request.
- E . A custom script that polls the `/api/v1/orgs/{org_id}/events` endpoint every second.