This topic describes the benefits of Alibaba Cloud Public DNS. Public DNS features authoritative Domain Name System (DNS) resolution, end-to-end recursive DNS resolution, access acceleration, global multi-node deployment, and high service stability.
End-to-end resolution and accelerated access to domain names
About half of the domain names in the globe are hosted in Alibaba Cloud DNS, and the data for both authoritative DNS resolution and recursive DNS resolution is stored in Alibaba Cloud DNS. This reduces the number of recursive lookups so that requests for accessing domain names are directly sent to the requested nodes, which accelerates access to domain names.
Update of resolution results in seconds and support for failover
Public DNS works with Alibaba Cloud DNS and Global Traffic Manager to update resolution results in seconds.
Public DNS supports various scheduling policies to implement disaster recovery.
Global multi-node deployment
A total of 27 DNS cluster nodes are deployed around the globe (China (Hangzhou), China (Shanghai), China (Chengdu), China (Shenzhen), China (Beijing), China (Qingdao), China (Nanjing), China (Dalian), China (Xian), China (Changsha), China (Tianjin), China (Jinan), China (Hongkong), US (Silicon Valley), US (Virginia), Singapore, Germany (Frankfurt), Australia (Sydney), Japan (Tokyo), UK (London), India (Mumbai), Indonesia (Jakarta), Philippines (Manila), Malaysia (Kuala Lumpur), South Korea (Seoul), Thailand (Bangkok), SAU (Riyadh)). This allows users to access the nearest nodes and obtain DNS responses with minimum latency.
Public DNS provides resolution lines of six major Internet service providers (ISPs) in China, which cover most provinces in the Chinese mainland. The ISPs are China Unicom, China Telecom, China Mobile, China Education and Research Network (CERNET), Dr. Peng Telecom & Media Group, and China Broadcasting Network. The resolution lines outside the Chinese mainland are distributed in different countries and regions.
Public DNS supports intelligent DNS resolution to direct users to the nearest nodes based on the sources of access requests. This enables fast access with low latency.
Advanced technologies and rich experience in DNS
Alibaba Cloud has been committed to the DNS field for many years and has developed a comprehensive series of DNS solutions. This helps Alibaba Cloud implement the resolution on its authoritative and recursive DNS servers by using its own DNS solutions.
High service stability
Public DNS runs on abundant nodes and supports precise scheduling. Based on years of experience in the DNS field, Alibaba Cloud delivers high-quality and stable DNS services to all users.
Multi-terminal integration
Public DNS Commercial Edition supports multiple types of terminals. Terminals that run iOS or Android can use Public DNS Commercial Edition as the DNS service by using SDKs or calling open API operations.