Domain Name System (DNS)


(1) Short for Domain Name System (or Service or Server), an Internet service that translates domain names into IP addresses. Because domain names are alphabetic, they’re easier to remember. The Internet however, is really based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. For example, the domain name www.example.com might translate to 198.105.232.4.

The DNS system is, in fact, its own network. If one DNS server doesn’t know how to translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.

(2) Short for digital nervous system,a term coined by Bill Gates to describe a network of personal computers that make it easier to obtain and understand information.

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    Short for DNS Based List, DNS Blacklist, or DNS Blocklist. A published list of IP addresses that can be queried through the Internet. DNSBLs are used to publish IP addresses associated with e-mail spam and spamming. Most mail servers can be configured to reject messages from addresses on a DNSBL. An address found in a […]

  • DNS SEC

    Short for DNS Security Extensions, DNS SEC is a set of extensions used to add an additional layer of security to the Domain Name System (DNS). DNS SEC was designed to prevent specific types of popular attacks on the Internet and protect against these threats to the Domain Name System. The specific extensions provide origin […]

  • DNS parking

    In the Web hosting business, DNS parking is a service that the Web host will offer to its clients as a way of securing a domain name for future use. The Web host registers the domain name with the InterNIC and “parks” the domain name on a server until it is ready to be made […]

  • DOCSIS

    Developed by CableLabs and approved by the ITU in March 1998, Data Over Cable Service Interface Specification defines interface standards for cable modems and supporting equipment. With certification from CableLabs, manufacturers will be able to produce cable modems for retail, so consumers no longer have to depend on leased cable modems from their cable providers. […]

  • DOA

    On eBay, eBay alternatives, and classified ad Web sites, DOA is an abbreviation used to mean dead on arrival, meaning item did not work when received by the buyer.


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