TIME TO LIVE

Domain	Definition
Computing	Time to Live (TTL) A field in the Internet Protocol header which indicates how many more hops this packet should be allowed to make before being discarded or returned. (1994-12-12). Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

Specialty Definition: Time to live

Time to live (TTL) is a field in the Internet Protocol header which indicates how many more hops this packet should be allowed to make before being discarded or returned.

TTL's also occur in the Domain Name System where they are set by an authoratitive nameserver for a particular Resource Record. When a Caching (recursive) nameserver queries the authoratitive nameserver for a Resource Record it will cache that record for the time specified by the TTL. If a stub resolver queries the caching nameserver for the same record before the TTL has expired the caching server will simply reply with the already cached resource record rather than retrieve it from the authoratitive nameserver again. Nameservers also have negative TTL's for negative replies (NXDOMAIN) they are generally short in duration (3 hours max).

Shorter TTL's can cause heavier loads on an authorative nameserver, but can be usefull when changing the address of critical services like web servers or MX records, and therefore are often lowered by the dns admin prior to a service being moved in order to minimise disruption.

see also traceroute, ping

This article (or an earlier version of it) contains material from FOLDOC, used with permission.

Modern Usage: TIME TO LIVE

Domain	Usage
Lyrics	A time to live and a time to die ("Rapper's Delight"; performing artist: Sugarhill Gang)
Movie/TV Titles	Time to Live (1964) A Time to Live (1954)
Source: compiled by the editor from various references; see credits.

Commercial Usage: TIME TO LIVE

Domain	Title
Books	A time to live (reference) Court Reporters & Stress : How to Find the Time to Live (reference) Simplify Your Work Life: Ways to Change the Way You Work So You Have More Time to Live (reference) (more book examples)

Music	Live in Houston / No Time to Live (reference) No Time to Live (reference) (more classical music examples; more popular music examples)
Source: compiled by the editor from various references; see credits.

Familiar Quotations: TIME TO LIVE

Author	Quotation
Johann Wolfgang Von Goethe	Rejoice that you have still have a long time to live, before the thought comes to you that there is nothing more in the world to see.
Source: compiled by the editor from various references.

Frequency of Internet Keywords: TIME TO LIVE

Anagrams: TIME TO LIVE

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "e-e-i-i-l-m-o-t-t-v"
	-1 letter: leitmotiv.
	-3 letters: emotive.
	-4 letters: etoile, iolite, mettle, motile, motive, mottle, omelet, telome, toilet, violet, vittle.
	-5 letters: elemi, elite, emote, evite, lieve, limit, lotte, motel, motet, motte, movie, olive, teloi, title, toile, totem, voile, volte, volti, vomit.
	Words containing the letters "e-e-i-i-l-m-o-t-t-v"
	+3 letters: competitively.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.