For a greenfield deployment, Juniper Mist provides several flexible methods to onboard switches. The Juniper Mist AI mobile application can be used to scan the QR code on a switch, which contains the unique claim code, to add it to an organization's inventory. For large-scale deployments, an entire purchase order can be linked to the Mist organization, automatically populating the inventory with all associated devices. Additionally, the comprehensive Mist API allows for programmatic and automated onboarding of switches, which is highly efficient for new, large-scale site rollouts.

A. The serial number is a device identifier but is not used as the primary input for the initial claiming process in the Mist portal or app; the claim/activation code is required.

E. The system MAC address is used for device identification and communication on the network, but it is not the primary credential used to claim a new switch into a Mist organization.

1. Juniper Mist Documentation, "Onboard a Switch to Your Organization": This document explicitly lists the valid methods for claiming a switch: "You can claim a switch by using one of the following methods: Activation Code, QR Code, Purchase Order." This directly supports options B and C. The document also mentions the API as a method for automation. (Source: Juniper Networks TechLibrary, Mist Wired Assurance section).

2. Juniper Mist Documentation, "Claim Switches by Purchase Order": This guide details the procedure for linking a Juniper sales order to a Mist organization. It states, "You can claim switches by using the purchase order (PO) that you used to buy the switches... When you claim switches by using a PO, all the switches in that PO are automatically assigned to your organization." This validates option C as a bulk onboarding method ideal for greenfield sites. (Source: Juniper Networks TechLibrary, Mist Wired Assurance section).

3. Juniper Mist API Documentation: The official API documentation outlines the endpoints available for managing an organization's inventory. Specifically, the POST /api/v1/orgs/{orgid}/inventory endpoint allows for programmatically adding devices to the inventory using their activation codes. This confirms that the API can be used to automate the provisioning and onboarding process, supporting option D. (Source: api.mist.com, Official Juniper Mist API Documentation, Org Inventory Operations).