Search results
Results From The WOW.Com Content Network
Under HTTP 1.0, connections should always be closed by the server after sending the response. [1]Since at least late 1995, [2] developers of popular products (browsers, web servers, etc.) using HTTP/1.0, started to add an unofficial extension (to the protocol) named "keep-alive" in order to allow the reuse of a connection for multiple requests/responses.
Keepalive time is the duration between two keepalive transmissions in idle condition. TCP keepalive period is required to be configurable and by default is set to no less than 2 hours. Keepalive interval is the duration between two successive keepalive retransmissions, if acknowledgement to the previous keepalive transmission is not received.
A request that upgrades from HTTP/1.1 to HTTP/2 MUST include exactly one HTTP2-Settings header field. The HTTP2-Settings header field is a connection-specific header field that includes parameters that govern the HTTP/2 connection, provided in anticipation of the server accepting the request to upgrade. [19] [20] HTTP2-Settings: token64: Obsolete
In HTTP/1.0, as stated in RFC 1945, the TCP/IP connection should always be closed by server after a response has been sent. [ note 3 ] In HTTP/1.1 a keep-alive-mechanism was officially introduced so that a connection could be reused for more than one request/response.
With HTTP 1.1, persistent connections are the default so the keep-alive connection-token and the Keep-Alive: header are not needed anymore, instead HTTP 1.1 compliant clients and servers use the "Connection: close" header to tell the other end it want to close the persistent connection. When used, the Keep-Alive header seems to accept ...
A keepalive is a message sent by one device to another to check that the link between the two is operating, or to prevent the link from being broken. Keepalive or keep-alive may also refer to: HTTP keep-alive, using a single TCP connection to send and receive multiple HTTP requests/responses; Keep-alive electrode, of a krytron
HTTP pipelining is a feature of HTTP/1.1, which allows multiple HTTP requests to be sent over a single TCP connection without waiting for the corresponding responses. [1] HTTP/1.1 requires servers to respond to pipelined requests correctly, with non-pipelined but valid responses even if server does not support HTTP pipelining.
The request/response message consists of the following: Request line, such as GET /logo.gif HTTP/1.1 or Status line, such as HTTP/1.1 200 OK,; Headers; An empty line; Optional HTTP message body data