All Products
Search
Document Center

Terms

Last Updated: Apr 15, 2021

This topic describes the terms of Domain Name System (DNS) to help you use Alibaba Cloud Public DNS.

DNS

DNS is an Internet service that translates domain names into IP addresses. Based on a distributed database, DNS makes it easier for you to access the Internet without the need to remember a string of machine-readable IP addresses.

domain name

To accommodate the increasing number of Internet users, a hierarchical tree structure is used for naming on the Internet. A host or router connected to the Internet has a unique name in the DNS hierarchy. This name is called the domain name.

application terminal

The terminal devices and application services that are dedicated for network access, including but not limited to mobile devices, Internet of Things (IoT) terminals, mobile apps, and mini programs.

DNS over HTTPS (DoH)

A security protocol for encrypting DNS requests. Public DNS uses TLS-encrypted HTTP connections that are specified in the RFC 8484 specifications to implement DNS resolution.

DNS over TLS (DoT)

A security protocol for encrypting DNS requests. Public DNS uses TLS-encrypted TCP connections that are specified in the RFC 7858 specifications to implement DNS resolution.