Information Series on DNS: Part 8

Abhijeet Modi/ September 16, 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 KX Records, what are they used for, and how do they work?

Commonly known as the Key Exchanger, KX records are identified by RFC 2230 and they have the type code of 36. Any type of domain, subdomain, or host can have the KX records. It is important to note that the KX records are not associated with any kind of security protocols, and thus they do not have any relation to the security of the DNS. The KX records can be used for a variety of domains and host addresses, however, they have a small deployment rate. The KX records are identified by 2230.

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

The LOC records are used for giving the geographical location of any domain or subdomain on the internet. In other words, these records specify the location linked to the current domain name. Specified by RFC 1876, the LOC records offer the WGS84 latitude, altitude, and longitude information. In addition to that, these records give the accurate location of the place from where the domain is hosted. Usually, the other computers searching for this domain might request information about the geographical location of the address.

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

Also known as the Mail Exchange records, these DNS records are used for delivering emails to the users’ computers. From the technical perspective, the mail exchange records suggest to the users which mail servers should the mail sent to your domain must be routed. It is important to connect the MX records to the accurate location, as you might not be able to receive the mails should you fail to point these records to the appropriate location. These records tell the mail servers that will be responsible for receiving the emails on behalf of any kind of domain. You can configure different types of MX records that point to multiple mail servers.

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