JN0-253 Practice Questions

Alerts represent network and device issues that are ongoing. Juniper Mist™ categorizes them as follows:

Infrastructure Alerts—Repeated events involving servers and protocols that can potentially affect a large number of clients. For example, an event during which a Domain Name System (DNS), Dynamic Host Configuration Protocol (DHCP), or RADIUS server is unreachable can affect many clients. Similarly, if a power supply on a switch is in alarm state, a large number of clients and a large amount of traffic could be affected.

Marvis Alerts—Repeated events that Marvis tracks on the Marvis Actions dashboard. For example, if an access point (AP) regularly fails health checks, you'll see a Marvis alert for it.

Security Alerts—Repeated events that could dramatically affect network security. For example, these alerts appear if a rogue AP is detected and clients start connecting to it.

Certificate Alerts—Notification for expired, and soon-to-expire, user-added digital certificates. These include RadSec (configured at Organization > Settings > RadSec Certificates and AP RadSec certificate), SSO (configured at Organization > Settings > Single Sign-On), and PSK Portal IDP certificates (configured at Organization > Client Onboarding). Certificate alerts appear on the Alerts page and begin 30 days before the certificate's expiry date, then the notification repeats 15, 7, 3, and 1 day before expiration unless the certificate is renewed. .

https://www.juniper.net/documentation/us/en/software/mist/mist-aiops/topics/concept/alerts-overview.html

TheJuniper Mist Cloudoperates as aregionally distributed cloud infrastructure, where each geographic region (for example, US, EU, APAC) hosts its own isolated Mist Cloud instance. This design ensures compliance with regional data privacy regulations, improves network performance, and enhances scalability and reliability.

According to theJuniper Mist Cloud Administration and Operations Guide, user accounts and organizations are region-specific, meaning:

“Users and organizations exist within specific regional Mist Clouds. A user account created in one regional cloud is valid only within that region and cannot be used to access organizations hosted in another cloud.”

This structure ensures data sovereignty and security while maintaining logical separation between regions. When administrators create a new user, that user’s credentials and access privileges applyonly to the Mist Cloud region in which the user was created.

Therefore:

Bis correct because users created in a regional cloud can only manage organizations within that same cloud.

Cis correct because a newly created user is enabled only for the regional cloud where it was registered.

OptionsAandDare incorrect because Mist Clouds are isolated — cross-region user or organization access is not supported.

Two wired elements configured using an organization-level template in Juniper Mist are VLAN and DNS settings. Organization-level templates are designed to standardize and propagate common settings across all switches within an organization. As per official guides: "These templates can include VLANs and well-known services such as DNS (Domain Name System) that can be used across all devices within a site." VLAN and DNS settings are defined once at the organization (or switch group) template and automatically inherited by all devices, ensuring consistency. Host name and role are set at an individual switch level, not globally via templates.

When a customer requests asubscription renewalfor Juniper Mist services via e-mail, the process is handled through a coordinated workflow between theJuniper Mist Cloud licensing systemandJuniper Support. The renewal request ensures that existing service entitlements—such asWireless Assurance,Wired Assurance,WAN Assurance,Marvis AI, orPremium Analytics—continue without interruption.

According to theJuniper Mist Cloud Licensing and Subscription Management Guide, the renewal workflow is described as follows:

“When a renewal request is submitted via e-mail, Juniper Mist support receives and validates the request, initiates processing for the selected subscriptions, and issues a new activation code once the renewal is completed.”

Here’s what happens after the renewal request:

B.  

The Juniper Mist systemsends a confirmation e-mailacknowledging the renewal request and routes it tosupport for processing.

C.  

Once processed,Juniper Mist generates and delivers an activation codevia e-mail that must be entered into the Mist portal to activate the renewed subscription(s).

Incorrect options:

A:No promotional materials or physical packages are sent.

D:A cancellation notice is not sent for renewal requests; it applies only to expired or terminated subscriptions.

Therefore, the correct answers are

B.  

The Juniper Mist REST API primarily provides functions for Juniper Mist configuration and historic statistics monitoring. According to the Juniper Mist documentation and API reference, the REST API allows users to automate configuration changes and retrieve historical data for analysis and reporting. Specifically, “configuration” functions include creating, updating, and deleting sites, devices, SSIDs, VLANs, templates, and user roles through API calls. “Historic statistics monitoring” refers to the API’s capability to pull time-series analytics on network and device performance, enabling users to query device usage, client events, SLE metrics, and application data over customizable timeframes.

Real-time statistics and event-driven monitoring are typically accessed via Mist’s WebSocket API, not the REST API. The REST API focuses on configuration management and historical data extraction for audit and trend analysis, supporting full automation and integration with third-party tools.

Verification:

These answers match the selections marked in your image ("Juniper Mist configuration" and "historic statistics monitoring") and are verified per Juniper’s API documentation and feature matrix.