certificate
Parameters
Specifies which mode of certificate registration to use with this resource. Valid options are DEFAULT with CaCertificatePem and CertificatePem, SNI_ONLY with CertificatePem, and Default with CertificateSigningRequest. DEFAULT : A certificate in DEFAULT mode is either generated by AWS IoT Core or registered with an issuer certificate authority (CA). Devices with certificates in DEFAULT mode aren't required to send the Server Name Indication (SNI) extension when connecting to AWS IoT Core . However, to use features such as custom domains and VPC endpoints, we recommend that you use the SNI extension when connecting to AWS IoT Core . SNI_ONLY : A certificate in SNI_ONLY mode is registered without an issuer CA. Devices with certificates in SNI_ONLY mode must send the SNI extension when connecting to AWS IoT Core .