One of the many challenges that can face a person while attempting to make modifications to a zone file is knowing what all of the different records are used for. This article highlight several of the commonly used records in an attempt to help demystify them. ; Panel 11.24.4-CURRENT_33868 ; Zone file for $TTL 14400 @ 86400 IN SOA ns. ( 2009022402 ; serial, todays date+todays 86400 ; refresh, seconds 7200 ; retry, seconds 3600000 ; expire, seconds 86400 ) ; minimum, seconds

It associates various information with domain names assigned to each of the participating entities.

Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for the purpose of locating and identifying computer services and devices with the underlying network protocols.

By providing a worldwide, distributed directory service, the Domain Name System is an essential component of the functionality of the Internet.

The Domain Name System delegates the responsibility of assigning domain names and mapping those names to Internet resources by designating authoritative name servers for each domain.

Mail Exchange record — The MX record state the location that mail directed at the domain will be sent.

Nameserver — The servers listed in the NS record are the authoritative nameservers for the domain.

IN TXT “v=spf1” Time to Live — The time to live value sets how long this information will be good for when a recursive DNS server queries for information on your domain name. Sate of Authority — The state of authority record specifies the DNS server providing authoritative information about an Internet domain, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.

The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or any resource connected to the Internet or a private network.

Network administrators may delegate authority over sub-domains of their allocated name space to other name servers.

This mechanism provides distributed and fault tolerant service and was designed to avoid a single large central database.

The Domain Name System also specifies the technical functionality of the database service which is at its core.