Practice Free JN0-252 Exam Online Questions
When assessing a Wi-Fi client’s signal-to-noise ratio, which statement is correct?
- A . The signal should be at least 25 dB greater than the noise floor.
- B . The signal should be at least -25 dBm greater than the noise floor.
- C . The signal should be at least -76 dBm greater than the noise floor.
- D . The signal should be at least 76 dB greater than the noise floor.
Which 802.11 amendment added OFDMA?
- A . 802.11ac
- B . 802.11n
- C . 802.11ax
- D . 802.11b
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 Ethernet cable is plugged into the wrong port on the AP.
- B . The cable run to each AP is too long.
- C . LLDP-MED is not configured on the switch.
- D . The APs’ firmware must be upgraded.
What are three alert levels used in the Mist UI? (Choose three.)
- A . critical
- B . warning
- C . error
- D . notice
- E . informational
What are asked to create a label that will be applied to a WLAN template.
This scenario, under which level should you create the label?
- A . clients
- B . organization
- C . site
- D . WLAN
C
Explanation:
When creating a label to be applied to a WLAN template in Mist AI, you should create the label at the site level. This is because WLAN templates are designed to be associated with specific sites or site groups, allowing you to customize WLAN configurations per site. Creating labels at the site level ensures that these configurations are applied appropriately within the desired site context.
Reference: Mist AI Documentation
Juniper Networks Site Groups
In the Mist UI, which two options are available when applying configuration templates? (Choose two.)
- A . Sites and Site Groups
- B . Location Zone
- C . Entire Org
- D . Specific AP
Which two statements are true about the Mist Cloud? (Choose two.)
- A . The Mist Cloud manages devices and collects data over separate connections
- B . Application payload data is not stored
- C . The Mist Cloud manages devices and collects data over the same connection
- D . Application payload data is stored offsite
How does Mist detect rogue APs?
- A . by using Radio Resource Management (RRM)
- B . by using the AP’s 5 GHz radio band
- C . by using the AP’s 2.4 GHz radio band
- D . by using the AP’s third dedicated radio
Which two statements are true about packet captures on an AP? (Choose two.)
- A . Only wireless packets can be captured.
- B . Wireless and wired packets can be captured.
- C . The involved APs are taken out of service.
- D . The involved APs remain in service.
B D
Explanation:
Mist APs have the capability to capture both wireless and wired packets. This feature allows for comprehensive network troubleshooting by providing visibility into both types of traffic.
When performing packet captures on Mist APs, the APs remain in service. This means they continue to operate and serve clients while the capture is ongoing, ensuring minimal disruption to network operations.
This functionality is critical for maintaining network availability and performance while conducting detailed packet analysis.
Reference: Juniper Networks documentation on Mist AI AP packet capture features.
…are asked to enable Mist management at an existing site with previously configured EX3400 brownfield switches, and to add a new greenfield switch, which statement is correct in this scenario?
- A . You can mix brownfield switches and greenfield switches as long as they are running a Mist-supported version of Junos.
- B . You cannot mix greenfield and brownfield switches at the same site.
- C . Brownfield switches can be adopted but not managed.
- D . You can mix brownfield switches and greenfield switches at the same site, but only if they are running the same version of Junos.
A
Explanation:
In the context of Mist management, "brownfield" switches refer to those that are already configured and deployed in a network, while "greenfield" switches are new and have no pre-existing configuration.
Mist supports the integration and management of both brownfield and greenfield switches within the same site. The crucial requirement is that all switches, regardless of their initial state, must be running a version of Junos that is supported by Mist.
This compatibility ensures that Mist can apply policies, configurations, and monitoring uniformly across all devices, facilitating a seamless management experience.
Reference: Juniper Networks documentation on Mist AI and Junos compatibility requirements.