---
title: "Global CDN glossary"
slug: "globalcdn-glossary"
tags: ["glossary", "용어", "Global CDN"]
updated: 2026-09-17T09:18:17Z
published: 2026-09-17T09:18:17Z
canonical: "guide.ncloud-docs.com/globalcdn-glossary"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Global CDN glossary

Available in Classic and VPC

There are several terms that you need to know to use Global CDN. The terms in the glossary and their definitions are as follows.

### Global CDN

A NAVER Cloud Platform service that can deliver content quickly and stably anywhere around the world

### Multipurpose Internet Mail Extensions (MIME)

Initially developed to convert email file attachments into text and send them through the email system, they are currently used as a file conversion method when sending files in various formats through the web

### Security Token

A feature, whose design is based on QueryString, that delivers content only when access is authorized

### Referrer Domain

Method that provides content on specified domains only to prevent them from being referenced in other sites. Supports 'www.domain.com' or '###.domains.com' formats, and only numbers, English letters, "###", "-", and "." can be used.

### Cache expiry

Specifies the cycle for checking whether the content cached on CDN have been changed on the source server

### Caching

Behavior of storing on a cache server to provide user requested content quickly

### Ignore query string

Behavior of removing GET parameters included in the URL, such as ?id=1234, and then making the request when the CDN service requests to the source server

### Purge

Feature that deletes content saved on the CDN cache server

          Note

          

To see a full list of terms and definitions, go to [Glossary](https://www.ncloud.com/guideCenter/glossary) from the NAVER Cloud Platform portal.