Intelligent Resolution Overview

Updated on 2025-02-28 GMT+08:00

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What Is DNS Resolver?

Typically, a DNS server returns the same resolution result to visitors from different networks or geographical locations. However, in case of cross-network or cross-region access, this would lead to long latency and poor user experience.

With configurable resolution lines, you can specify that the DNS server return different resolution results for the same domain name based on the networks or geographical locations of visitors' IP addresses.

In addition to ISP and region lines, the DNS service allows you to define resolution lines based on IP address ranges to route visitors to different web servers.

For a website deployed on multiple servers, you can set different weights for the record sets to balance the loads of these servers.

Where to Use

Table 1 describes the application scenarios of DNS Resolver.

**Table 1** Application scenarios of DNS Resolver
Operation	Scenario	Constraints
Configuring ISP Lines for Record Sets	Configure ISP lines to distinguish visitors by carrier.	Resolution lines can be configured only for public zones.
Configuring Region Lines for Record Sets	Configure region lines to distinguish visitors by geographical location.	Resolution lines can be configured only for public zones.
Configuring Custom Lines	Configure custom lines to distinguish visitors by IP address range.	Resolution lines can be configured only for public zones.
Configuring Weighted Routing	Configure weight-based resolution for load balancing based on the proportion of requests to each record set.	Resolution lines can be configured only for public zones.