Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » S »

Start of Authority

Abbreviated SOA, a type of resource record that is used by the Domain Name System (DNS). Every domain name has an SOA record in its database that indicates basic properties of the domain and the zone that the domain is in. The SOA record contains:
  • The host name for the primary name server for the zone.
  • An e-mail address of the person who is responsible for the domain.
  • The serial number for the zone.
  • The refresh interval. This is how often, in seconds, the secondary name servers check with the primary name server to see if any changes have been made to the domain's zone file.
  • The time, in seconds, a secondary server waits before retrying a failed zone transfer. This time is typically less than the refresh interval.
  • The time, in seconds, before a secondary server stops responding to queries, or "expires" a zone, after a lapsed refresh interval where the zone was not refreshed or updated.
  • The minimum time-to-live (TTL). This value is supplied in query responses by servers for the zone to inform others how long they should cache a resource record provided in an answer.






TECH RESOURCES FROM OUR PARTNERS
DID YOU KNOW?
11 Tips to Boost Your Wi-Fi Signal

It's not just your lawnmower and household tools that your neighbor won't return. Our top picks include everything from updating device firmware... Read More »

Interesting Times: Transformation in the IT Channel

Business transformation will remain the buzzword of the moment as channel firms continue to assess the direction of their companies in the age of... Read More »

What is a Virtual Private network (VPN)?

Companies and organizations will use a VPN to communicate confidentially over a public network and to send voice, video or data. Read More »

QUICK REFERENCE
29 Free Android Apps for Cash-Strapped Students

From wacky alarm clocks to lecture hall tools and after class entertainment, these Android apps are a good fit for a student's life and budget. Read More »

Network Fundamentals Study Guide

A network is a group of two or more computer systems or devices, linked together to share resources, exchange files and electronic communications.... Read More »

Computer Architecture Study Guide

This Webopedia  study guide describes the different parts of a computer system and their relations. Read More »