这是用在IPv4头部和IPv6头部的下一首部域的IP协议号列表。 Internet Protocol IPv4 IPv6 以太类型 存档副本 (PDF). [2006-05-27]. (原始内容 (PDF)存档于2007-09-27). Official list of protocol numbers(页面存档备份,存于互联网档案馆)
Transfer Protocol (HTTP/1.1): Message Syntax and Routing". "Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content". "Hypertext Transfer Protocol (HTTP/1