Information Series on DNS: Part 4

Abhijeet Modi/ September 11, 2021/ Blog

The following series of articles details information of DNS Records, we are covering each setting in the series, providing basic use and purpose.

What are CSYNC Records, what are they used for, and how do they work?

The general use of the CSYNC is to synchronize one or more files efficiently. The records synchronize the files located on multiple systems or different directories. The records are identified by RFC 7477 and the main use of these records is to suggest the sync system between the parent and the child DNS system.

What are DHCID Records, what are they used for, and how do they work?

The DHCIF records are designed to be utilized by the DHCP servers and clients. Only the DHCP clients can add these records to your domain, as it is not possible to add them through any other random interface. The main use of these records is to link the domain name to the DHCP client. The DHCID records are identified by RFC 4701.

What are DLV Records, what are they used for, and how do they work?

DLV records are quite similar to the DS records, in a sense that the presentation as well the structure of the records of DLV is similar to the DS records.  Defined by RFC 4431, the DLV records are pretty simple DNS records. It is not associated with any kind of processing requirements. Despite having the same structure as the DS records, DLV records do no have the special management requirements as the former. You may have to refer to the RFC 5074 to get a better idea of how these records are to be used. The main application of the DLV records is in the publication of DNNSEC trust anchors.

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