Every applicant must indicate which RSPs will support the gTLD's critical registry functions. These functions are: Domain Name System (DNS), Domain Name System Security Extensions (DNSSEC), Extensible Provisioning Protocol (EPP), Registration Data Access Protocol (RDAP), and Data Escrow.
At a minimum, each application must designate one Main RSP, one DNS RSP, and one DNSSEC RSP. Proxy RSPs are optional and may be used when registration validation is needed for local legal compliance. An organization may be evaluated for one or more RSP types through the RSP Evaluation Program.