Juniper JN0-251 Online Practice Questions and Exam Preparation

Juniper JN0-251 Online Questions & Answers

• Question 1:

  You have just brought online a new site of AP43s. While verifying that everything looks good, you notice that all of the access points (APs) are reporting "insufficient power." The APs are connected to an 802. 3at-capable switch. In this scenario, what would be the cause of the error?

  A. The cable run to each AP is too long.
  B. The Ethernet cable is plugged into the wrong port on the AP.
  C. The APs' firmware must be upgraded.
  D. LLDP-MED is not configured on the switch.
  D. LLDP-MED is not configured on the switch.

• Question 2:

  Click the Exhibit button.

  

  You notice a green LED emitted from your AP43. Referring to the exhibit, what does this signal indicate?

  A. The AP is configured correctly and at least one user is connected to it.
  B. The AP is configured correctly with no users connected to it.
  C. The AP is not configured correctly with no users connected to it.
  D. The AP is not configured correctly but one user is connected to it.
  A. The AP is configured correctly and at least one user is connected to it.

• Question 3:

  Which protocol does the REST API use?

  A. syslog
  B. SNMP
  C. HTTP
  D. SSL
  C. HTTP

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  Explanation/Reference:

  Reference: https://www.juniper.net/documentation/us/en/software/junos/rest-api/topics/concept/rest-api-overview.html

• Question 4:

  You just received the newest Mist AP and want to enable a feature that is only available at this time on Release Candidate 1.

  In this scenario, using the Mist GUI, where would you determine which version of Release Candidate 1 is available for your AP?

  A. Support Tickets and Documentation-> Feature Updates
  B. Support Tickets and Documentation-> Ports and Endpoints
  C. Support Tickets and Documentation-> Mist Edge Updates
  D. Support Tickets and Documentation-> Firmware Updates
  D. Support Tickets and Documentation-> Firmware Updates

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  Explanation/Reference:

  Reference: https://www.juniper.net/documentation/us/en/software/nce/nce-214-midsize-branch-mist-pwp/topics/topic-map/nce-214-midsize-branch-mist-example_part2.html

• Question 5:

  You attempt to log in to manage.mist.com, however you receive a 404 error from your browser. You are able to browse other public websites and you suspect a problem with manage.mist.com. In this scenario, which step would you take to immediately find out the status of the Mist cloud?

  A. Visit https://support.juniper.net/support/.
  B. Visit https://status.mist.com.
  C. Visit https://mist.com/status.
  D. Visit https://www.mist.com/support.
  B. Visit https://status.mist.com.

• Question 6:

  Which Mist AI feature would help you to troubleshoot a client's failed authentication?

  A. client dashboard
  B. live view
  C. dynamic packet capture
  D. WLAN profile
  C. dynamic packet capture

• Question 7:

  Which Mist supported API is considered data-driven?

  A. RESTful
  B. Webhook
  C. WebSocket
  D. gRPC
  D. gRPC

• Question 8:

  Which statement is correct about a WLAN RF medium?

  A. A WLAN RF is a full duplex, contention free medium where each client transmits on a separate channel.
  B. A WLAN RF is a full-duplex, contention-free medium where 802.11 stations can transmit and receive at the same time.
  C. A WLAN RF is a half-duplex, shared medium where 802.11 stations contend with each other for access.
  D. A WLAN RF is a half-duplex, contention-free medium where the access point polls each station in turn.
  C. A WLAN RF is a half-duplex, shared medium where 802.11 stations contend with each other for access.

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  Explanation/Reference:

  Reference: https://thewlan.com.au/2017/01/13/cwna-chapter-7-wireless-lan-topologies/

• Question 9:

  You want to obtain detailed information on a wireless client.

  In this scenario, which area would you use to accomplish this task?

  A. Insights
  B. Templates
  C. SLEs
  D. Security
  A. Insights

• Question 10:

  Which two APIs are supported by Mist? (Choose two.)

  A. SOAP
  B. gRPC
  C. Webhook
  D. REST
  A. SOAP
  D. REST