---
title: "TTL (Time To Live) — Definition | FourSight Glossary"
url: https://foursight.cloud/glossary/ttl
description: "How long, in seconds, a DNS resolver may cache a record before re-querying. Low TTL = fast propagation but higher query volume; high TTL = the opposite."
lang: en
---

Back to glossary: https://foursight.cloud/glossary

Web & Networking

# TTL (Time To Live)

How long, in seconds, a DNS resolver may cache a record before re-querying. Low TTL = fast propagation but higher query volume; high TTL = the opposite.

Source

- IETF — RFC 1035 — TTL (https://datatracker.ietf.org/doc/html/rfc1035#section-3.2.1)

## Related terms

HTTP Status Codes (2xx / 4xx / 5xx)

Three-digit response codes returned by HTTP servers.
https://foursight.cloud/glossary/http-status-codes

Timeout

The maximum time a client waits for a response before giving up.
https://foursight.cloud/glossary/timeout

DNS (Domain Name System)

The internet's address book — translates human-readable domain names like foursight.cloud into IP addresses…
https://foursight.cloud/glossary/dns

A Record

A DNS record that maps a hostname to an IPv4 address (e.g.
https://foursight.cloud/glossary/a-record

AAAA Record

Maps a hostname to an IPv6 address.
https://foursight.cloud/glossary/aaaa-record

CNAME Record

An alias DNS record that points one hostname to another (e.g.
https://foursight.cloud/glossary/cname-record

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