Juniper JN0-251 Mist AI, Associate Exam JNCIA-MistAI Exam Practice Test

Answer : C

According to the Cisco Content Hub1, Wi-Fi is half duplex, meaning we can either transmit (Tx) or receive (Rx) on the medium, the clients and the network take turns accessing the medium. Wi-Fi is contention based, meaning there are rules for stations trying to access the medium and collisions (due to two or more stations simultaneously accessing the medium) are worked out fairly so everyone gets a chance.

Answer : B, D

The correct answer is B. lower frequency and D. more congestion. These are two characteristics of the 2.4 GHz band when compared to the 5 GHz band.The 2.4 GHz band uses lower frequencies than the 5 GHz band, which means that it can penetrate solid objects better and have more range1.However, the lower frequencies also mean that the 2.4 GHz band has less bandwidth and speed than the 5 GHz band1.The 2.4 GHz band is also more congested than the 5 GHz band, as it has fewer non-overlapping channels and more interference from other devices and routers that use the same frequency band23.The 5 GHz band, on the other hand, has more non-overlapping channels and less interference, which makes it faster and more reliable23.

Answer : A, B

According to the official Mist documentation1, wireless packet captures are helpful when trying to dissect and dig down into the root cause of any wireless issue between a client and AP. You can determine if packets being sent are actually reaching their destination as well as identify if packets are corrupted. With the enhanced packet capture flow, Mist also introduced the ability to capture packets on the wired side of your network as well. This data is captured from the Eth0 port of your AP, and will examine the packets between the AP and the rest of your wired network. This includes any RADIUS, DHCP, or DNS servers you have set up.

The Mist UI does not support BLE packet capture or packet capture on cloud uplink.

Answer : A

The correct answer is A. microservices based. This is the characteristic that describes Mist's cloud software architecture.Mist's cloud software architecture is based on microservices, which are small, independent, and loosely coupled software components that communicate with each other through APIs1.Microservices allow for faster development, deployment, scaling, and maintenance of cloud applications, as well as improved reliability, performance, and security1.Mist's cloud software architecture leverages microservices to provide AI-driven network management and operations, as well as innovative features such as vBLE engagement, Marvis Virtual Network Assistant, and Wi-Fi Assurance2.

Answer : B

According to the web search results, the Mist Location Engine is a service that provides location-based services (LBS) for wireless networks, such as indoor positioning, wayfinding, or asset tracking1.The Mist Location Engine uses a patented dynamic BLE array that consists of 16 directional antennas that transmit BLE signals in eight different directions2.The user device, such as a smartphone or a tablet, can receive these signals and send the signal information, such as the RSSI and the device sensor data, back to the Mist Location Engine via Wi-Fi or cellular2.

The Mist Location Engine then processes the signal information and uses machine learning and probability surfaces to determine the location of the user device2.The location is expressed as an x,y coordinate on a floor plan map that represents the highest probability of where the user device is located2.The Mist Location Engine can also provide other information, such as the location accuracy, the location history, and the location events of the user device2.

Answer : A, C

According to the web search results, labels are a key feature for Mist, as they can be used to make decisions and policies easier to understand. Labels are similar to tags or groups that represent a collection of users or resources.Labels can be used to classify your users and resources while building the WxLAN policies, which define a list of rules, restrictions, and other settings that can be applied to devices in order to change how they are treated by the network1.Labels can also be used to create a group of access points and apply a WLAN configuration using the apply to Access Points configuration while creating a WLAN1.

Answer : A, C

A microservice can be added without system downtime. This is because microservices are independent and loosely coupled components that communicate over well-defined APIs. Adding a new microservice does not affect the functioning of other existing microservices or the overall application.The new microservice can be deployed and integrated seamlessly with the rest of the system1.

A microservice can be updated without system downtime. This is because microservices allow each service to be developed, tested, and deployed independently of other services. Updating a microservice does not require changing or restarting the entire application.The updated microservice can be rolled out gradually or reverted easily if needed2.