Dynamic Port Configuration (DPC) in the Juniper Mist cloud allows administrators to automatically apply a specific port configuration based on the attributes of the device connecting to a switch port. The configuration process requires two fundamental steps: first, specifying which ports on the switch will be enabled for dynamic configuration. Second, creating rules that define the device-matching criteria (e.g., LLDP information) and selecting the corresponding Port Profile (Configuration Profile) that should be applied to the port when a match occurs. This automates port provisioning for devices like access points, phones, and cameras.

B. Define the polling frequency for DPC.

DPC is an event-driven feature, typically triggered by link-up events and LLDP/CDP advertisements from a connected device, not by a configurable polling mechanism.

D. Define the minimum Junos version.

While a minimum Junos version is required for the feature to function, it is a system prerequisite, not a configurable parameter within the DPC policy itself.

1. Juniper Mist Documentation, "Dynamic Port Configuration": This official guide outlines the configuration steps. It explicitly states, "Select the ports on which you would like to enable Dynamic Configuration" and "In the rule configuration, select the Port Profile that client devices will be assigned to when matching the rule." This directly supports answers C and A, respectively. The document makes no mention of configuring a polling frequency or a Junos version within the DPC rule.

Source: Juniper Mist Cloud Documentation, available under the "Switches" section. (Direct link cannot be provided as it's within the authenticated Mist portal, but the public-facing documentation mirrors this process).

2. Juniper Networks, "Juniper Mist Wired Assurance Feature Guide", Section: Port Profiles: This guide details the use of Port Profiles, which are the core component applied by DPC. It explains that Port Profiles are applied to ports either statically or dynamically. The dynamic application is achieved through DPC, which requires associating these profiles with rules and applying them to a selection of ports.

Source: Juniper Networks Technical Documentation, specific guides for Mist Wired Assurance. The process described confirms that selecting a profile (A) and assigning it to ports (C) are the essential actions.