This topic describes the update history of Public DNS SDK for iOS.
Latest version of SDK for iOS: V1.1.1
The caching feature is added.
Negative caching is supported.
The optimal IP address selection feature is added.
The internal logic of the SDK is optimized.
The SDK is released for the first time to implement domain name resolution.
DNS requests are directly sent to the public DNS server of Alibaba Cloud, bypassing local DNS servers of the Internet service provider (ISP). This prevents domain name hijacking and inaccurate scheduling caused by local DNS servers.