The Juniper Mist cloud UI provides extensive remote troubleshooting capabilities. It allows network administrators to initiate live packet captures directly on managed devices without needing physical access. This includes capturing 802.11 wireless frames on a specific radio or for a particular client connected to a Mist Access Point. Additionally, for Juniper EX Series switches managed by the Mist cloud, the UI enables the initiation of wired packet captures on any specific switch port to analyze traffic and diagnose connectivity issues.

C. It can initiate a BLE packet capture.

The Mist UI provides extensive BLE analytics and location data but does not offer a user-facing tool to initiate a raw BLE protocol packet capture.

D. It can initiate a packet capture on cloud uplink.

While you can capture packets on a physical uplink port (as a wired capture), there is no distinct feature specifically to capture the "cloud uplink" control traffic.

1. Juniper Mist Documentation, "Live Packet Captures": This document details the wireless packet capture feature. It states, "You can use the packet capture tool to capture wireless frames on the AP. You can run the capture for a specific client or on a specific radio (2.4 GHz or 5 GHz)." This directly supports option A.

Source: Juniper Networks, Mist Cloud Documentation, Access Points > Troubleshoot with Live Tools > Live Packet Captures.

2. Juniper Mist Documentation, "Packet Capture (Switches)": This section explains the process for capturing wired packets on managed switches. It states, "You can use the packet capture tool to capture packets on a specific port of a switch... The packet capture tool is useful for troubleshooting network issues." This directly supports option B.

Source: Juniper Networks, Mist Cloud Documentation, Switches > Troubleshoot a Switch > Packet Capture.