Similar to HTTPの持続的接続
 - Constrained Application ProtocolConstrained Application Protocol
 - HTTP ETagHTTP ETag
 - HAProxyHAProxy
 - HAR (ファイルフォーマット)HAR (file format)
 - HTTP 302HTTP 302
 - HTTP Strict Transport SecurityHTTP Strict Transport Security
 - HTTP/1.1 UpgradeヘッダーHTTP/1.1 Upgrade header
 - HTTP/2HTTP/2
 - HTTP/3HTTP/3
 - HTTPSHTTPS
 - HTTPリファラHTTP referer
 - HTTPパイプラインHTTP pipelining
 - LibwwwLibwww
 - MIMEMIME
 - RESTCONF
 - Secure HyperText Transfer ProtocolSecure Hypertext Transfer Protocol
 - WebDAVWebDAV
 - WebhookWebhook
 - WebSocketWebSocket
- X-Forwarded-ForX-Forwarded-For
 - XMLHttpRequestXMLHttpRequest
 - HTTP cookieHTTP cookie
 - Server Name IndicationServer Name Indication
 - SPDYSPDY
 - セッション (コンピュータ)Session (computer science)
 - Digest認証Digest access authentication
 - HTTP認証
 - Hyper Text Coffee Pot Control ProtocolHyper Text Coffee Pot Control Protocol