Juniper Networks JN0-253: Mist AI, Associate (JNCIA-MistAI)

Last checked October 22, 2026 against the official Juniper Networks exam page.

1. Question 1Mist AI fundamentals

   An engineer deploys a new Juniper Mist access point. The AP must be managed from the Mist cloud rather than configured locally. Which component is responsible for the cloud management of the AP?

   1. AThe Mist cloud, which the AP connects to for configuration and telemetry
   2. BA local controller that must be installed in every branch office
   3. CA RADIUS server that stores the AP's configuration and its wireless certificates
   4. DA DHCP server running on each access switch that hands out addresses to the AP
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   Correct answer: A

   Mist APs are cloud-managed, and they connect to the Mist cloud for configuration, firmware and telemetry. The other components do not hold the AP's management configuration.

2. Question 2Wireless Operations

   Users connect to a corporate SSID and sometimes fail authentication. The team wants the Mist portal to show failure reasons for each client connection. Which view provides this?

   1. AThe switch's spanning tree summary for the uplink ports
   2. BThe printer's status page on the floor network for printing
   3. CThe client details and events for the connection in the Mist portal
   4. DThe router's OSPF link-state database for the core area
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   Correct answer: C

   Client events and details show the authentication sequence and failure reasons for each connection. Spanning tree summaries, OSPF databases and printer pages do not show wireless client authentication.

3. Question 3Wired Operations

   A Mist-managed switch must be configured so that its ports are assigned to the right VLANs based on the wired client's role. Which feature supports this?

   1. ADisabling all VLANs on the switch
   2. BManual VLAN configuration by a technician on each port in the closet
   3. CPort profiles or port configuration templates in the Mist portal
   4. DConfiguring the printer's IP address on the switch
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   Correct answer: C

   Port profiles and templates assign VLANs and settings consistently based on port roles, which scales well. Manual per-port changes are error-prone, disabling VLANs removes segmentation, and printer addresses are not switch port settings.

4. Question 4WAN and Branch

   A branch office needs secure routing and firewall functions to connect to headquarters over the internet. Which Juniper product category is appropriate?

   1. AA passive patch panel with 24 RJ-45 keystone ports
   2. BA wireless access point for branch Wi-Fi
   3. CAn SRX or Session Smart Router for the branch
   4. DA USB network adapter with gigabit Ethernet support
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   Correct answer: C

   SRX firewalls and Session Smart Routers provide branch routing, security and VPN capabilities. An access point, patch panel and USB adapter do not provide routing and firewall functions.

5. Question 5Mist AI fundamentals

   An administrator wants to know whether users are having a good experience on a wireless network, measured against the targets defined for the site. Which Mist concept measures this?

   1. ASpanning Tree bridge priority on uplinks
   2. BService-level expectations (SLEs)
   3. CThe DHCP lease time for wireless users
   4. DNative VLAN settings on the trunk ports
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   Correct answer: B

   SLEs measure user experience against defined targets, such as successful connections and throughput, for wireless and wired services. Spanning Tree priority, native VLANs and lease times are not experience measures.