- RFC 7230 - HTTP/1.1: - low-level message parsing and connection management
- RFC 7232 - HTTP/1.1: Conditional Requests - e.g., If-Modified-Since
- RFC 7233 - HTTP/1.1: - getting partial content
- RFC 7234 - HTTP/1.1: Caching - browser and intermediary caches
- (中文版)