The StartTLS extended operation is a type of extended operation that can be used to initiate a TLS-secured communication channel over an otherwise clear-text connection.

StartTLS allows clients to use the same network port for both secure and insecure communication.

The LDAP StartTLS SupportedExtension operation is defined in RFC 4511 and further described in RFC 4513.

The StartTLS extended operation uses an OID of with no value. The response includes an OID of (the same as the request OID) with no value.

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