Which solution is used for automating the configuration of a device when it is first powered on, using DHCP and TFTP?

Cisco Plug and Play (PnP) is designed for automating the configuration of new devices as they are powered on, specifically utilizing DHCP to discover a PnP server and TFTP to download initial configuration files or bootstrap images, streamlining network device deployment.

IPXE is a preboot execution environment for booting operating systems over a network, but it's a general network boot technology, not a specific solution for automating initial device configuration in the context implied by Cisco networking devices.

SNMP (Simple Network Management Protocol) is used for monitoring and managing network devices *after* they are configured, not for their initial, automated configuration at power-on.

FTP (File Transfer Protocol) can be used to transfer files, but it's not a comprehensive solution for automating the initial configuration process including device discovery and configuration application like PnP is.