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

# LDH

字母、数字、连字符

传统域名标签中仅允许使用的字符的英文简称：字母a到z、数字0到9以及连字符。标签不能以连字符开头或结尾。其他文字的名称必须转换为这种形式才能在DNS中使用。

## 相关术语

- [标签](https://tldlog.com/zh/cihui/biaoqian/)
- [A标签](https://tldlog.com/zh/cihui/a-biaoqian/)
- [Punycode](https://tldlog.com/zh/cihui/punycode/)
- [IDN](https://tldlog.com/zh/cihui/idn/)
- [域名](https://tldlog.com/zh/cihui/yuming/)