How can ETags help improve performance?

ETag如何帮助提升性能？

youdao

IIS 5.0 and 6.0 have a similar issue with ETags.

IIS 5.0和6.0出现ETags类似问题。

youdao

IIS 5.0 and 6.0 have a similar issue with ETags.

IIS 5.0和6.0出现ETags类似问题。

youdao