Most Recent Juniper JN0-251 Exam Questions & Answers

According to theJuniper Networks documentation, there are two methods that are supported for configuring a Mist environment: using the API and using the GUI1.The API is a programmatic interface that allows you to interact with the Mist cloud and perform various tasks, such as creating and managing organizations, networks, sites, devices, users, and policies2.The API uses the RESTful architecture and supports JSON and XML formats2.You can use the API to automate and customize your Mist environment according to your needs2.

The GUI is a graphical user interface that allows you to access and manage your Mist environment through a web browser1.The GUI provides a user-friendly and intuitive way to configure and monitor your Mist devices, networks, sites, users, and policies3.The GUI also provides various features, such as dashboards, reports, analytics, insights, troubleshooting tools, and Marvis virtual network assistant3.You can use the GUI to easily and quickly set up and optimize your Mist environment3.

According to the web search results, the Marvis Action category that will detect a bad cable based on information and behavior of a single AP is Switch1.The Switch category lists the issues related to the switches that are connected to the Mist APs, such as missing VLANs, L2 loops, or bad cables1.The bad cable action detects if an AP is connected to a switch port that has a faulty cable, which can cause packet loss, CRC errors, or link flaps1.The bad cable action is based on the information and behavior of a single AP, such as the AP's MAC address, IP address, switch port, and link status1.The bad cable action also provides a recommended solution, which is to replace the cable or use another switch port1.

WAN Assurance is a cloud-based service that provides visibility and insights into the WAN performance and user experience. WAN Assurance supports two device categories:SSRandSRX. SSR stands for Session Smart Router, which is a software-defined WAN (SD-WAN) solution that delivers high-performance, secure, and reliable connectivity for distributed enterprises. SRX stands for Services Gateway, which is a next-generation firewall (NGFW) that provides advanced security and threat prevention for branch and remote locations.

WAN Assurance does not support EX or Mist Edge devices. EX is a series of Ethernet switches that provide high-performance, scalable, and secure switching for campus and data center networks. Mist Edge is a device that extends the Mist Cloud to the edge of the network, enabling local processing of WLAN functions, such as authentication, encryption, and firewall.

You can find more information about WAN Assurance in the Juniper TechLibrary1or the Juniper Mist WAN Assurance Overview2.

According to the web search results, the administrator role that you must have to view audit logs is Network Admin.Audit logs are records of the actions and changes that occur on the Mist platform, such as configuration updates, firmware upgrades, device claims, or user logins1.Audit logs can help network administrators monitor, troubleshoot, and audit their network by providing information such as the date, time, user, site, device, and description of each action1.

According to theAdministrator Rolespage, there are five types of roles that can be assigned to users in a Mist organization: Super User, Network Admin, Helpdesk, Observer, and Installer2.Each type of role has different read and write capabilities for the organization and its sites2.Network Admin is one of the roles that can view audit logs, as it has limited read/write access to all sites under the organization and can access organization-level features such as Audit Logs and Inventory2.Network Admin can also open/update support tickets from the GUI2.

According to the [Service Level Expectations] page, Service Level Expectations (SLEs) are a set of metrics that measure the quality and performance of the wireless network from the user's perspective. SLEs can help network administrators monitor, troubleshoot, and optimize their network by providing real-time and historical data and analytics. SLEs can also help network administrators identify and resolve issues before they impact the user experience.

There are seven SLEs that are supported by Mist: Successful Connects, Time to Connect, Capacity, Coverage, Throughput, Roaming, and WAN. Each SLE has a target value and a threshold value that can be customized according to the network requirements. The SLE score is calculated as the percentage of clients that meet or exceed the target value for each SLE.

Two SLEs that report DHCP problems are Successful Connects and Time to Connect. DHCP (Dynamic Host Configuration Protocol) is a protocol that assigns IP addresses and other network configuration parameters to devices on a network. DHCP problems can occur when a device fails to obtain an IP address from the DHCP server or when the DHCP server is slow or unreachable.

Successful Connects is an SLE that measures the percentage of clients that successfully connect to the wireless network within a specified time frame. Successful Connects can report DHCP problems by showing the number of clients that fail to connect due to DHCP errors, such as DHCP timeout, DHCP NAK, or DHCP decline. Successful Connects can also show the root cause analysis and recommended actions for resolving DHCP problems.

Time to Connect is an SLE that measures the average time it takes for a client to connect to the wireless network from the moment it sends a probe request to the moment it receives an IP address from the DHCP server. Time to Connect can report DHCP problems by showing the breakdown of the connection time into different stages, such as probe, auth, assoc, EAPOL, and DHCP. Time to Connect can also show the outliers and trends for each stage and identify if there are any delays or failures in the DHCP process.