Juniper Juniper Certification JN0-451 Questions & Answers

• Question 61:

  Which Wireless Assurance SLE has classifiers of Association, Authorization, DHCP, and Internet Services?

  A. Roaming

  B. Coverage

  C. Time to Connect

  D. Capacity

  Correct Answer: D

  Reference: https://www.mist.com/documentation/service-level-expectations-sle/

• Question 62:

  A user with a PSK calls you and says, "The Wi-Fi worked for a week and now it does not work." There have not been any recent configuration changes to the network. You suspect that a time-based setting has reset the key. In this scenario, where would you begin troubleshooting?

  A. Site-level Pre-Shared Keys

  B. Organization-level Pre-Shared Keys

  C. WLAN-level Pre-Shared Keys

  D. RADIUS Pre-Shared Keys

  Correct Answer: C

• Question 63:

  What is the AP's role in the IEEE 802.1X authentication process?

  A. It acts as an authenticator.

  B. It acts as a RADIUS proxy server.

  C. It acts as a supplicant.

  D. It acts as an authentication server.

  Correct Answer: D

• Question 64:

  You have deployed location services at a site and have installed an application which includes the Mist SDK on Bluetooth-only mobile client devices. The devices with the SDK- enabled app have Bluetooth enabled, but the devices do not appear in the Mist GUI under Clients/App Clients.

  What is causing this problem?

  A. There is BLE and Wi-Fi co-channel interference.

  B. The clients are connected to the wrong WLAN.

  C. The AP BLE radios do not hear the SDK-enabled client's BLE beacons.

  D. The client devices are not connected to Wi-Fi or to a cellular data plan.

  Correct Answer: C

• Question 65:

  According to the 802.11 standard, how wide are 2.4 GHz band OFDM channels?

  A. 5 MHz

  B. 22 MHz

  C. 20 MHz

  D. 3 MHz

  Correct Answer: C

  Reference: https://www.cnrood.com/en/media/solutions/Wi- Fi_Overview_of_the_802.11_Physical_Layer.pdf

• Question 66:

  Regarding the seven layer OSI networking model, which two layers are different between Ethernet and Wi-Fi? (Choose two.)

  A. media access control (MAC) sub-layer

  B. network layer

  C. logical link control (LLC) sub-layer

  D. physical layer

  Correct Answer: AD

• Question 67:

  Which two SLEs measure the amount of time that it takes for a process to complete? (Choose two.)

  A. roaming

  B. AP uptime

  C. throughput

  D. time to connect

  Correct Answer: CD

  Reference: https://www.juniper.net/documentation/us/en/day-one-plus/mist/mist-cloud-day- one-plus.pdf

• Question 68:

  Some users cannot connect to the network. You want to identify these users. In Marvis, which query accomplishes this task?

  A. troubleshoot access points

  B. unhappy clients

  C. troubleshoot clients

  D. list clients

  Correct Answer: D

  Reference: https://www.mist.com/documentation/useful-marvis-queries/

• Question 69:

  Your customer added an Apple TV in their conference room so that employees can easily share their screen. However, the Apple TV cannot be discovered by the employees' devices. Which two settings are causing the problem? (Choose two.)

  A. MDNS

  B. Broadcast/Multicast

  C. Ignore Broadcast SSID Probe Requests

  D. ARP

  Correct Answer: AD

• Question 70:

  Which two events are displayed under the Client Events area found on the Insights page? (Choose two.)

  A. Reassociation

  B. Restart by User

  C. Reflection (Loop Detection)

  D. DHCP Denied

  Correct Answer: AD