Alibaba Cloud DNS uses multiple resolution lines to deliver intelligent geolocation DNS (GEO DNS) services. That is, based on the visitor’s IP address, the most optimal resolution address is returned to allow users a fast and smooth access user experience.
For example, if a visitor is identified as a China Unicom user, the domain name is resolved to the IP address of the China Unicom server. If a visitor is identified as a China Telecom user, the domain name is resolved to the IP address of the China Telecom server.
Use ISP lines
You must specify an ISP line when adding a record. Alibaba Cloud DNS supports the following ISP lines:
China Telecom
China Mobile
China Unicom
CERNET (China Education and Research Network).
World Line (non-China based lines and specified at three different levels: the world, a continent, or a country).
Example
Add the following records for your domain name.
| Record | Type | Host | ISP Line | Value | TTL |
|---|---|---|---|---|---|
| 1 | A | www | Default | 1.1.1.1 | 600 |
| 2 | A | www | World line | 2.2.2.2 | 600 |
In this way, a visitor located in an area outside China is directed to 2.2.2.2, while a visitor located in China is directed to 1.1.1.1.