Juniper JN0-252 Exam Dumps & Practice Test Questions
Question No 1:
What happens when a subscription for Mist devices expires?
A. The devices continue to operate normally, but management of these devices through the Mist management GUI is restricted.
B. The devices continue to operate normally, but certain functionalities related to expired subscriptions are hidden in the Mist management GUI.
C. The devices remain fully operational, and all management functionalities stay available for a one-year grace period after the subscription expiration.
D. The devices stop functioning, and you can no longer access them through the Mist management GUI.
Correct Answer:
B. The devices continue to operate normally, but certain functionalities related to expired subscriptions are hidden in the Mist management GUI.
Explanation:
When a subscription for Mist devices expires, the devices themselves will continue to function as expected, ensuring that basic connectivity and networking services remain unaffected. This means that end users will still experience the same level of service in terms of network access, such as Wi-Fi connectivity or traffic routing, regardless of the subscription status.
However, the Mist management GUI will be affected. Some advanced features, especially those tied to the subscription, such as AI-driven optimizations, advanced analytics, and cloud-based insights, will become inaccessible. These premium functionalities are linked directly to the active subscription, and once expired, they are no longer available through the management interface. They are effectively "hidden" from the GUI, which limits the capabilities available to administrators.
It's important to note that the basic management functions such as device monitoring, configuration updates, and simple performance management may still be available. This limitation encourages organizations to renew their subscriptions to regain access to the full suite of advanced tools that Mist offers for optimizing their network performance.
This structure allows organizations to continue using the core services, but it restricts access to the more sophisticated features, which are typically used for larger-scale network management and analytics.
Question No 2:
In Mist UI, which two Marvis Actions are associated with the AP (Access Point) category? (Choose two.)
A. Coverage Hole
B. Health Check Failed
C. MTU Mismatch
D. High CPU
Correct Answer:
A. Coverage Hole
C. MTU Mismatch
Explanation:
In Mist's Marvis AI-driven analytics system, Marvis Actions are automated features designed to help network administrators quickly identify and resolve issues. These actions are specific to different categories of devices and provide real-time insights into network performance. When it comes to the Access Point (AP) category, the most relevant Marvis Actions are:
Coverage Hole (Option A): This Marvis Action is triggered when an area of the wireless network lacks sufficient signal coverage, leading to weak or dropped connections. Marvis detects coverage gaps and notifies the administrator, helping to quickly resolve the issue. For example, the administrator may choose to reposition or add additional access points (APs) in the affected area to restore full coverage, ensuring a seamless wireless experience for users.
MTU Mismatch (Option C): The Maximum Transmission Unit (MTU) defines the maximum size of a packet that can be transmitted over a network. When the MTU settings on the AP and connected devices do not match, packet fragmentation or loss can occur, leading to network issues. Marvis automatically identifies these mismatches and alerts the administrator, enabling them to adjust the settings for optimized data transmission.
On the other hand:
Health Check Failed (Option B) and High CPU (Option D) are not exclusive to access points but apply to broader network devices. While these issues can impact network performance, they are more general problems affecting the overall device health and are not specifically tied to the AP category within Mist's Marvis system.
By leveraging Coverage Hole and MTU Mismatch Marvis Actions, administrators can proactively maintain optimal network performance and address any issues that may arise with access points in their Mist-managed network.
Question No 3:
What tool or technology is commonly used in Wireless Assurance to evaluate and analyze information regarding potential network faults, ensuring proper network performance and identifying issues proactively?
A. SNMP
B. Machine Learning
C. Tcpdump
D. Syslog Analysis
Correct Answer: D. Syslog Analysis
Explanation:
In the context of Wireless Assurance, ensuring network performance and proactively addressing potential issues is essential. One of the primary tools used for this purpose is syslog analysis. This technology involves collecting and analyzing log data generated by various network devices, such as routers, switches, and access points. The logs contain important details about system events, errors, and any network irregularities. By monitoring these logs, network administrators can identify potential problems like configuration errors, hardware issues, or software bugs before they lead to significant network disruptions. Syslog analysis provides real-time visibility into the health of the network and allows for rapid troubleshooting, ensuring that issues are resolved quickly.
The other technologies mentioned also play important roles, but they serve slightly different purposes:
SNMP (Simple Network Management Protocol) is used for real-time monitoring and collecting device data, but it’s not as focused on fault analysis as syslog analysis.
Machine Learning is an emerging technology that helps predict and diagnose network problems by analyzing historical data, but it's still being developed for full-scale implementation in network management.
Tcpdump is a packet-sniffing tool useful for analyzing network traffic, but it doesn’t provide the same fault detection or proactive monitoring as syslog analysis.
Therefore, syslog analysis stands out as the primary method for detecting network faults in wireless assurance, enabling effective and proactive network management.
Question No 4:
Which two of the following Mist UI options can be configured to receive notifications about changes in the status of the Mist Cloud? (Select two.)
A. Slack
B. Email
C. RSS
D. SNMP
Correct Answer:
A. Slack
B. Email
Explanation:
Mist, a cloud-managed networking solution, enables administrators to efficiently monitor the operational status of the Mist Cloud platform. To ensure timely responses to any changes or disruptions in the cloud’s status, the Mist UI provides multiple options for receiving notifications. Among these, Slack and Email are the primary methods used for real-time alerts:
Slack (Option A): Slack is a popular collaboration and communication tool used by many organizations for team messaging and real-time updates. Mist allows seamless integration with Slack channels, enabling administrators to receive instant notifications directly within their workspace. When there is a change in the status of the Mist Cloud—such as a service disruption or maintenance update—Slack notifications keep the relevant team members informed, allowing them to take immediate action.
Email (Option B): Email notifications provide a traditional, reliable way to keep administrators informed about the status of the Mist Cloud. Email alerts can be configured to include detailed information, ensuring that administrators and stakeholders are aware of any critical updates. Given that email is a widely-used communication channel, it serves as a trusted method for delivering urgent notifications.
In contrast, RSS (Option C) and SNMP (Option D) are not typically configured for receiving Mist Cloud status notifications. RSS is primarily used for delivering content updates like news feeds, and while it may be used for monitoring updates, it is not a common choice for cloud status notifications. SNMP (Simple Network Management Protocol) is widely used in network management for device monitoring but is not tailored for cloud service status alerts in Mist.
By configuring Slack and Email for notifications, administrators can ensure they receive immediate alerts on Mist Cloud changes, helping them respond quickly to potential issues. This integration plays a key role in proactive network management, minimizing downtime and service interruptions.
Question No 5:
According to Juniper Networks, what are two recommended best practices for the placement of Access Points (APs), excluding AP12, to ensure optimal accuracy and stability of location-based services? (Choose two.)
A. Ensure that each Access Point (AP) has an unobstructed line of sight to at least two other Access Points.
B. Enable a wireless mesh network for improved connectivity.
C. Mount the Access Point on the ceiling with its LED indicator facing down toward the floor.
D. Mount the Access Point above the ceiling, and the orientation of the LED indicator does not impact performance.
Correct Answer:
A. Ensure that each Access Point (AP) has an unobstructed line of sight to at least two other Access Points.
C. Mount the Access Point on the ceiling with its LED indicator facing down toward the floor.
Explanation:
Juniper Networks recommends certain best practices to ensure optimal performance for location-based services (LBS), which depend heavily on precise and stable connectivity. The placement of Access Points (APs) plays a crucial role in enhancing location accuracy and network stability. Here’s why the correct options matter:
Unobstructed Line of Sight (Answer A):
Ensuring that each Access Point (AP) has an unobstructed line of sight to at least two other APs helps improve signal propagation and minimizes the potential for interference. A clear communication path between APs enables better triangulation of device locations, which is crucial for accurate location-based services. This setup reduces disruptions caused by walls or other physical barriers, allowing for more precise tracking.Mounting the AP on the Ceiling with the LED Indicator Facing Down (Answer C):
Mounting the Access Point on the ceiling ensures that the coverage is maximized across the floor area, which is especially important for maintaining stable wireless connectivity. Orienting the LED indicator to face down not only helps with easier identification and troubleshooting but also ensures that the AP’s performance status is visible without having to access the ceiling. This makes ongoing maintenance and monitoring more efficient.
Why the other options are incorrect:
Option B (Enabling a wireless mesh) is beneficial for extending coverage and improving redundancy but does not directly influence the accuracy or stability of location-based services from a placement perspective. It focuses more on network connectivity rather than AP placement.
Option D (Mounting above the ceiling with LED orientation irrelevant) is not ideal. While mounting above the ceiling might make the AP less obtrusive, it can cause signal attenuation and create maintenance challenges. The orientation of the LED does affect troubleshooting and visibility, so this option doesn’t align with best practices.
By adhering to these placement best practices, the network’s performance and the accuracy of location-based services can be maximized, leading to a more reliable system.
Question No 6:
In the Mist UI, which component of the system platform provides information about missing VLANs?
A. Events
B. Service-Level Exceptions
C. Switch Insights
D. Marvis Actions
Correct Answer: C. Switch Insights
Explanation:
In Mist UI, Switch Insights is the component that provides detailed insights into the network’s switch configurations, including identifying any missing VLANs. VLANs are critical in network segmentation, and ensuring they are properly configured on switches is essential to maintaining optimal performance and preventing issues.
Switch Insights actively monitors the switches in the network and highlights any misconfigurations, including missing VLANs. If a VLAN is not properly configured or is missing from a switch, Switch Insights will flag this issue, enabling network administrators to take corrective action quickly. This helps ensure that the network operates smoothly, and all network segments function as expected.
Here’s why the other options are not correct:
A. Events track system-wide occurrences, like errors or significant network changes. While events could potentially capture issues related to VLANs, they do not specifically highlight missing VLANs or provide insights on VLAN configurations.
B. Service-Level Exceptions are used to track performance metrics such as latency, packet loss, and throughput. Missing VLANs are not related to performance issues but rather to network configuration, so this option is not relevant for identifying missing VLANs.
D. Marvis Actions is an AI-driven network assistant that helps optimize network performance by providing suggestions and insights. While Marvis is useful for overall network management, it is not the primary component for monitoring VLAN configurations or identifying missing VLANs.
Therefore, Switch Insights is the correct component within Mist UI for providing information about missing VLANs.
Question No 7:
Why is it important to set the correct time zone for a Mist site, and what benefit does this provide?
A. Enable remote access to the site during specific time slots
B. Optimize network performance based on time-of-day usage
C. Facilitate troubleshooting by aligning event timestamps with local time
D. Synchronize device clocks for accurate scheduling of events
Correct Answer: C. Facilitate troubleshooting by aligning event timestamps with local time
Explanation:
Setting the correct time zone for a Mist site is essential for accurate event logging and troubleshooting. By aligning event timestamps with the local time zone, it becomes much easier to identify and resolve issues. Misaligned timestamps can cause confusion during troubleshooting, as the timing of events may appear out of sync, making it challenging to pinpoint when problems occurred.
For example, when network issues or security events are logged with incorrect timestamps due to a time zone mismatch, administrators may struggle to assess the situation correctly. Having synchronized time stamps ensures that the sequence of events is clear, which is crucial for effective troubleshooting and investigation.
Why Other Options Are Incorrect:
Option A: Remote access management is not directly related to time zone settings.
Option B: Network optimization based on time-of-day is not the primary concern of time zone configuration.
Option D: Synchronizing device clocks is important but not as critical for troubleshooting as aligning event timestamps.
Thus, the correct benefit is related to troubleshooting, making C the most accurate answer.
Question No 8:
Which of the following statements accurately describe the relationship between Mist organizations and sites? (Select two options.)
A. An organization is contained within a site.
B. A site is contained within an organization.
C. Multiple sites may exist within a single organization.
D. Multiple organizations can exist within a single site.
Correct Answers:
B. A site is contained within an organization.
C. Multiple sites may exist within a single organization.
Explanation:
In Mist’s architecture, the organization is the highest level of management, representing the overall account that holds network configurations, devices, and settings. A site, on the other hand, corresponds to a specific physical location (such as an office or store) within the organization where the actual network devices (like access points) are deployed and managed.
Answer Breakdown:
Option B is correct because a site is always part of an organization, not the other way around.
Option C is correct because an organization can host multiple sites, allowing for management of several locations under the same organizational structure.
Option A is incorrect because it suggests that an organization exists within a site, which is the reverse of the actual structure.
Option D is incorrect because a site can only belong to one organization. Multiple organizations cannot share a single site.
Thus, the correct answers are B and C, reflecting how Mist structures its network management: an organization can contain multiple sites, but a site can only be part of one organization.
Question No 9:
Which of the following statements accurately describe the capabilities of Mist's Single Sign-On (SSO) feature? (Select two.)
A. Guest user access can utilize SSO.
B. Mist administrative logins can utilize SSO.
C. Mist administrative logins cannot utilize SSO.
D. Guest user access cannot utilize SSO.
Correct Answer:
B. Mist administrative logins can utilize SSO.
D. Guest user access cannot utilize SSO.
Explanation:
Mist, part of Juniper Networks, offers a cloud-managed network solution with advanced authentication features, one of the key offerings being Single Sign-On (SSO). SSO enables users to authenticate once and then access multiple systems or applications without needing to log in repeatedly, which simplifies user management and enhances security. In the case of Mist, SSO serves different purposes depending on the type of user accessing the system.
Mist administrative logins can utilize SSO (Option B):
Mist allows network administrators to leverage SSO for logging into the platform. This integration simplifies the authentication process for admins by enabling them to use a centralized identity provider (IdP) for authentication. With SSO, administrators don’t need to remember and maintain separate credentials for Mist’s administrative interface, which improves both security and operational efficiency. Moreover, it ensures that the organization's existing authentication methods, such as multi-factor authentication (MFA), are applied consistently.
Guest user access cannot utilize SSO (Option D):
On the other hand, SSO is not designed to support guest user access in Mist’s system. Guest users, typically with temporary or limited access, often use a separate authentication flow, such as through a captive portal. This is generally distinct from the SSO flow used by administrators. Guest access tends to be more straightforward, usually involving simple credentials or automated authentication through a different system, but does not integrate with the enterprise-level identity management systems required by SSO. Given the temporary nature of guest access, utilizing SSO for this user type would introduce unnecessary complexity and security concerns.
In summary, Mist’s SSO feature is primarily intended for administrative purposes, where managing a small number of users with high-level access is critical. Meanwhile, guest access remains separate, with simpler authentication processes that do not leverage SSO integration.
Question No 10:
Which of the following features are provided by the Junos OS in terms of routing policy configuration? (Choose three)
A. Policy-based routing
B. Route maps
C. Prefix lists
D. Routing filters
E. Static routes
Correct Answers:
A. Policy-based routing
D. Routing filters
E. Static routes
Explanation:
Junos OS, which powers Juniper devices, provides several mechanisms for configuring routing policies that control the flow of traffic in and out of networks. The following features are commonly used in routing policy configuration:
Policy-based routing (A): This allows traffic to be routed based on specific criteria such as source IP address, destination IP address, or even application type, rather than relying solely on the destination IP. Policy-based routing is essential in network environments where you need to influence routing decisions beyond standard IP routing metrics.
Routing filters (D): Routing filters are used in Junos OS to control the advertisement and acceptance of routing information. They allow network administrators to specify which routes should be included or excluded based on defined criteria such as prefixes, community attributes, and more. Filters are a key part of fine-tuning routing policies, especially in complex networks.
Static routes (E): Static routing is one of the simplest methods for directing network traffic to specific destinations. Although it doesn’t dynamically adapt to network changes, static routes are still essential for ensuring predictable routing paths in certain scenarios, such as point-to-point links or small networks.
Not applicable:
Route maps (B) are typically a feature found in Cisco networking devices rather than Junos.
Prefix lists (C) are also more common in Cisco environments and aren’t used directly in Junos OS for routing policy configuration.
Thus, Policy-based routing, Routing filters, and Static routes are the correct choices.
