To provide the upper-level name server with thenecessary resource records (RRs), the following infor

-mation must be provided: 1. The domain name of the upper-level name server. 2. The IP address of the upper-level name server. 3. The hostname of the primary authoritative name server for the domain. 4. The IP address of the primary authoritative name server for the domain. 5. The contact information (e-mail address) for a responsible person in charge of this domain's DNS records. 6. Any other resource records that are necessary, such as MX records, A records, CNAMEs, etc., that are needed to resolve queries for this domain and its subdomains or services (such as mail servers).