---
id: "dns-caching"
kind: "glossary-term"
title: "DNS缓存"
language: "zh-Hans"
category: "DNS与技术基础"
updated: "2026-10-10T12:00:00Z"
canonical: "https://tldlog.com/zh/cihui/dns-huancun/"
translations:
  en: "https://tldlog.com/glossary/dns-caching/"
  es: "https://tldlog.com/es/glosario/almacenamiento-cache-dns/"
  de: "https://tldlog.com/de/glossar/dns-caching/"
  fr: "https://tldlog.com/fr/glossaire/mise-cache-dns/"
  it: "https://tldlog.com/it/glossario/caching-dns/"
  pt-BR: "https://tldlog.com/pt/glossario/cache-dns/"
  ru: "https://tldlog.com/ru/glossariy/keshirovanie-dns/"
---

# DNS缓存

将DNS应答保存一段时间、无需再次查询的做法。解析器、操作系统和浏览器都会这样做。每条记录的TTL规定了可保存的时长，这就是DNS变更不会在所有地方同时生效的原因。

## 相关术语

- [TTL](https://tldlog.com/zh/cihui/ttl/)
- [解析器](https://tldlog.com/zh/cihui/jiexiqi/)
- [否定缓存](https://tldlog.com/zh/cihui/fouding-huancun/)
- [DNS传播](https://tldlog.com/zh/cihui/dns-chuanbo/)
- [存根解析器](https://tldlog.com/zh/cihui/cungen-jiexiqi/)