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PDF Exam Material 2025 Realistic JN0-451 Dumps Questions
NEW QUESTION # 25
Regarding roaming, which device determines when it is time to connect to another AP?
- A. the gateway router
- B. the client device
- C. the primary AP
- D. the current AP
Answer: B
Explanation:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, roaming is the process of moving a wireless client device from one AP to another while maintaining network connectivity. The client device determines when it is time to connect to another AP based on its own roaming algorithm and criteria.
NEW QUESTION # 26
What are two ways to access Marvis? (Choose two.)
- A. Use Actions.
- B. Use Insights.
- C. Use the conversational assistant.
- D. Use config templates.
Answer: A,C
Explanation:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, there are two ways to access Marvis, which is a virtual network assistant that provides insights and troubleshooting for wireless networks:
Use the conversational assistant, which allows you to ask natural language questions and get answers from Marvis.
Use Actions, which are predefined queries that you can select from a list and get results from Marvis.
NEW QUESTION # 27
You are installing and booting up your first Juniper Mist AP at your site.
By default, which two statements are correct in this scenario? (Choose two.)
- A. The AP will send DHCP requests using the native VLAN.
- B. The AP will attempt to connect to the Mist cloud using port 443.
- C. The AP will attempt to connect to the Mist cloud using port 8080.
- D. The AP will send DHCP requests with a VLAN ID of 10.
Answer: A,B
Explanation:
According to the Initial AP Connection and VLANs & Static IP addresses - Mist document1, when a Juniper Mist AP boots up for the first time, it will expect to see a trunked port or the native VLAN=1 and will send a DHCP request on that VLAN. The AP will attempt to connect to the Mist cloud using port 443, which is the default HTTPS port.
NEW QUESTION # 28
Referring to the exhibit, what are two reasons why a Mist AP would have multiple IP addresses? (Choose two.)
- A. One IP address is used for redundancy.
- B. One IP address is used for control traffic and one address is used for management traffic.
- C. A guest portal is configured on a tagged VLAN.
- D. The Local Status Page is enabled in the site settings.
Answer: C,D
NEW QUESTION # 29
You are troubleshooting a client that has had intermittent connectivity problems. Using Marvis to troubleshoot, you see that AP uptime is negatively affecting the client. When inspecting Marvis' troubleshooting response, which category should you select to see when the AP went offline?
- A. AP Metrics
- B. Location
- C. Classifiers
- D. Correlation
Answer: A
NEW QUESTION # 30
Regarding the seven layer OSI networking model, which two layers are different between Ethernet and Wi-Fi?
(Choose two.)
- A. network layer
- B. logical link control (LLC) sub-layer
- C. physical layer
- D. media access control (MAC) sub-layer
Answer: C,D
Explanation:
Explanation
Regarding the seven layer OSI networking model, the two layers that are different between Ethernet and Wi-Fi are media access control (MAC) sub-layer and physical layer. So the correct answers are A. media access control (MAC) sub-layer and D. physical layer.
NEW QUESTION # 31
Which two statements are correct about Juniper Mist Dynamic Packet Capture? (Choose two.)
- A. It is automatically attached to the Affected Items list in the Successful Connects SLE.
- B. No configuration is necessary for Mist's Dynamic Packet Capture.
- C. It must be globally configured at the organization level.
- D. It is automatically attached to a client event displayed on the Insights page.
Answer: B,D
Explanation:
Two correct statements about Juniper Mist Dynamic Packet Capture are that no configuration is necessary for Mist's Dynamic Packet Capture and it is automatically attached to a client event displayed on the Insights page. So the correct answers are A. No configuration is necessary for Mist's Dynamic Packet Capture and B. It is automatically attached to a client event displayed on the Insights page.
NEW QUESTION # 32
Site A is configured with a WLAN and a policy. The administrator creates a configuration template at the organization level with additional policies for the same WLAN and mentions Site A in this template.
In this scenario, which statement is correct?
- A. The policy that is created at the site level will execute first.
- B. There is no option to mention the site in the config template at the organization level.
- C. The policy that is created in the config template at the organization level will execute first.
- D. The policy created at the organization level can be applied to a site group, not to an individual site.
Answer: A
Explanation:
Explanation
When there is a conflict between policies created at different levels, the policy created at the site level will execute first.
NEW QUESTION # 33
Which two statements correctly describe an extended service set (ESS)? (Choose two.)
- A. Each BSS within the ESS has its own unique BSSID.
- B. Each BSS within the ESS share a common BSSID.
- C. The SSID is unique across all BSSs within the ESS.
- D. The SSID is common across all BSSs within the ESS.
Answer: A,D
Explanation:
According to the Lecture 3 - Radio Frequency and Antenna Fundamentals - Part 2 document2, an extended service set (ESS) is a group of basic service sets (BSSs) that share a common SSID and are connected by a distribution system (DS). Each BSS within the ESS has its own unique BSSID, which is the MAC address of the AP.
NEW QUESTION # 34
Mist WLAN objects are configurable at which two levels? (Choose two.)
- A. organization
- B. access point
- C. site group
- D. site
Answer: C,D
Explanation:
Explanation
According to the Mist documentation1, WLANs are wireless networks that can be configured with different settings such as SSID, security, encryption, authentication, etc. WLANs can be created and managed at different levels of hierarchy in the Mist cloud.
The site group level allows you to create and apply WLANs to a group of sites that share common characteristics or requirements2. This helps you to simplify and standardize your WLAN configuration across multiple sites.
The site level allows you to create and manage WLANs for a specific site that may have unique needs or preferences1. This gives you more flexibility and granularity for your WLAN configuration at each site.
NEW QUESTION # 35
Which Wireless Assurance SLE has classifiers of Association, Authorization, DHCP, and Internet Services?
- A. Coverage
- B. Time to Connect
- C. Capacity
- D. Roaming
Answer: C
NEW QUESTION # 36
You are asked to forward event messages from Mist to an external log collector.
In this scenario, which feature would enable this capability?
- A. SNMP traps
- B. webhooks
- C. NETCONF
- D. syslog
Answer: D
Explanation:
Explanation
Syslog is a protocol that can be used to forward event messages from Mist to an external log collector.
NEW QUESTION # 37
Which two SLEs measure the amount of time that it takes for a process to complete? (Choose two.)
- A. roaming
- B. throughput
- C. AP uptime
- D. time to connect
Answer: A,D
Explanation:
According to the Virtual Network Assistant | Juniper Networks US document3, two SLEs that measure the amount of time that it takes for a process to complete are:
Roaming, which measures how long it takes for a client to switch from one AP to another without losing connectivity.
Time to Connect, which measures how long it takes for a client to complete all steps of network access such as authentication, DHCP, and DNS.
NEW QUESTION # 38
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. ARP
- B. Ignore Broadcast SSID Probe Requests
- C. Broadcast/Multicast
- D. MDNS
Answer: C,D
Explanation:
Explanation
If a customer added an Apple TV in their conference room so that employees can easily share their screen but the Apple TV cannot be discovered by the employees' devices, two settings that could be causing this problem are MDNS and Broadcast/Multicast. So the correct answers are A. MDNS and B. Broadcast/Multicast.
NEW QUESTION # 39
Asset tracking using Mist-supported third-party BLE beacons has been installed in a warehouse. The BLE beacons were configured using their manufacturer-supplied configuration utility and BLE was properly configured for the site settings. When the warehouse floor plan is opened in Live View, the third-party beacons are not shown.
Which two statements describe causes for this issue? (Choose two.)
- A. The APs are installed at 19 feet from the floor, above the recommended 15 feet.
- B. The Show assets check box has not been selected in Live View.
- C. The Locate this Client as an Asset check box has not been selected at the BLE client level.
- D. Marvis was not enabled for the site.
Answer: B,C
Explanation:
According to the Mist documentation1, asset tracking is a service that allows you to find key assets and people with detailed analytics based on their location using Mist-supported third-party BLE beacons. To enable asset tracking, you need to configure both the BLE beacons and the Mist cloud settings.
The Show assets check box is a setting in Live View that allows you to display or hide the assets on the floor plan2. If this check box is not selected, you will not be able to see the third-party beacons on Live View.
The Locate this Client as an Asset check box is a setting at the BLE client level that allows you to treat a BLE client as an asset for location purposes3. If this check box is not selected, you will not be able to track the BLE client as an asset.
NEW QUESTION # 40
What happens first when a client requests to join a WLAN?
- A. 802.11 association
- B. DHCP discovery
- C. 802. 11 authentication
- D. ARP request
Answer: C
NEW QUESTION # 41
You are asked to set up occupancy analytics for an office that has an existing Mist AP.
Which three types of devices are counted by default? (Choose three.)
- A. Wi-Fi clients
- B. BLE assets
- C. Zigbee clients
- D. cellular clients
- E. mobile app clients
Answer: A,D,E
Explanation:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide3, three types of devices that are counted by default for occupancy analytics are:
Mobile app clients, which are devices that have a mobile app installed with the Mist SDK or BLE beaconing enabled.
Cellular clients, which are devices that have cellular connectivity and can be detected by Mist APs using LTE sensing.
Wi-Fi clients, which are devices that have Wi-Fi connectivity and can be detected by Mist APs using Wi-Fi scanning.
NEW QUESTION # 42
Site A is configured with a WLAN and a policy. The administrator creates a configuration template at the organization level with additional policies for the same WLAN and mentions Site A in this template.
In this scenario, which statement is correct?
- A. The policy that is created in the config template at the organization level will execute first.
- B. There is no option to mention the site in the config template at the organization level.
- C. The policy that is created at the site level will execute first.
- D. The policy created at the organization level can be applied to a site group, not to an individual site.
Answer: A
NEW QUESTION # 43
Under which hierarchy level would you create a new site configuration?
- A. organization
- B. access points
- C. clients
- D. location
Answer: A
Explanation:
Explanation
To create a new site configuration in Juniper Mist UI, you would do so under the organization hierarchy level.
So the correct answer is D. organization.
NEW QUESTION # 44
According to the Coverage SLE, which classifier tracks an AP that transmits at a lower data rate than a connected client?
- A. Device Capability
- B. Asymmetry Downlink
- C. Latency
- D. Slow OKC Roam
Answer: D
NEW QUESTION # 45
Referring to the exhibit, what are two reasons why a Mist AP would have multiple IP addresses? (Choose two.)
- A. One IP address is used for redundancy.
- B. The Local Status Page is enabled in the site settings.
- C. A guest portal is configured on a tagged VLAN.
- D. One IP address is used for control traffic and one address is used for management traffic.
Answer: C,D
NEW QUESTION # 46
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 AP BLE radios do not hear the SDK-enabled client's BLE beacons.
- C. The client devices are not connected to Wi-Fi or to a cellular data plan.
- D. The clients are connected to the wrong WLAN.
Answer: B
NEW QUESTION # 47
Which two events are displayed under the Client Events area found on the Insights page? (Choose two.)
- A. Reflection (Loop Detection)
- B. Reassociation
- C. DHCP Denied
- D. Restart by User
Answer: B,C
NEW QUESTION # 48
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