Authentic Juniper Certification Exam JN0-253 Questions Answers

Juniper MistAccess Assuranceis a cloud-based network access control service that provides secure wired and wireless access through identity- and policy-based mechanisms. According to the official Juniper Mist AI documentation, Access Assurance usesuser and device identityto determine network access privileges dynamically.

The service enforces access policies primarily in two ways:

Assigning Specific Roles to Users:Access Assurance dynamically assigns roles to users and devices after successful authentication. These roles are used to apply specific network policies and permissions, defining what level of access or network resources a user or device is allowed. Roles can be leveraged in wireless SSID configurations or switch access policies to ensure consistent enforcement across the infrastructure.

Grouping Users into Network Segments:Access Assurance also allows grouping of users and devices intonetwork segmentsusing VLANs or Group-Based Policy (GBP) technology. This segmentation isolates users or devices into logical groups, ensuring security and optimized traffic handling. Policies are then applied to these groups to control communication between segments, thereby maintaining a zero-trust framework.

Options A and B are incorrect because Access Assurance does not establish VPN tunnels or passively monitor traffic as its primary method of access control. It relies instead onidentity-based role assignment and segmentationto enforce network security.

Thesession policy settingsin theJuniper Mist Clouddefine how long a user session remains active and how the system manages session expirations due to inactivity. These configurations help ensure bothsecurityandefficient resource managementacross the Mist Cloud portal and API sessions.

According to theJuniper Mist Cloud Administration and Security Configuration Guide:

“Session policy defines session timeout and inactivity timeout parameters, controlling how long users can remain logged into the Mist Cloud portal or API before re-authentication is required.”

Session Timeout:Specifies the maximum duration a session can remain active, regardless of activity.

Inactivity Timeout:Defines how long a session can remain idle before automatic logout.

These policies help maintain strong access security by reducing the risk of unauthorized access through stale sessions.

Other options such as password complexity (A, C) and two-factor authentication (D) are configured underauthentication and access policies, not session policies.

Therefore, the correct answer isB. The duration for session timeout and inactivity timeout.

Marvis Minisis a component of theMarvis Virtual Network Assistant (VNA)within theJuniper Mist AI ecosystem. It is designed to proactively ensure optimal network performance and user experience by runningsynthetic network testsusing Mist-managed access points.

According to theJuniper Mist Marvis Minis Technical Overview, this feature allows APs to act asvirtual clientsthat automatically simulate user connection flows, including authentication, DHCP, DNS, and application reachability. These tests validate that thenetwork configuration and servicesare functioning as expected, even before real users experience issues.

The documentation states:

“Marvis Minis operates in conjunction with Mist AI to continuously validate network configurations and optimize user experience by identifying potential problems proactively.”

“Using Mist APs, Marvis Minis performs synthetic transactions to verify the performance of wireless, wired, and WAN segments without requiring external devices.”

Hence,Marvis Minis is not a support team (A),not a design AI model (B), andMarvis Actions (C)is a different feature for identifying and resolving live issues. The accurate description is thatMarvis Minis collaborates with Mist AI to validate configurations and optimize user experiences.