This topic describes the terms of Domain Name System (DNS) to help you use Alibaba Cloud Public DNS.
DNS
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 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 a domain name.
application terminal
A device or an application service that is dedicated for network access. Application terminals include but are not limited to mobile devices, Internet of Things (IoT) devices, mobile apps, and mini programs.
DNS over HTTPS (DoH)
A security protocol for encrypting DNS requests. This protocol is defined in RFC 8484 and allows Alibaba Cloud Public DNS to use TLS-encrypted HTTP connections to implement DNS resolution.
DNS over TLS (DoT)
A security protocol for encrypting DNS requests. This protocol is defined in RFC 7858 and allows Alibaba Cloud Public DNS to use TLS-encrypted TCP connections to implement DNS resolution.