What does http in the URL refer to?

The http in the URL refers to the Hypertext Transfer Protocol, which is a communication protocol based on TCP/IP to transmit data; the HTTP protocol is the most widely used network transmission protocol on the Internet, and all WWW files This standard must be adhered to.

The http in the URL refers to the Hypertext Transfer Protocol.

HTTP protocol (HyperText Transfer Protocol) is the most widely used network transmission protocol on the Internet. All WWW files must comply with this standard.

HTTP is a communication protocol based on TCP/IP to transfer data (HTML files, image files, query results, etc.).

HTTP working principle

The HTTP protocol works on a client-server architecture. As an HTTP client, the browser sends all requests to the HTTP server, that is, the WEB server, through the URL.

Web servers include: Apache server, IIS server (Internet Information Services), etc.

The Web server sends response information to the client according to the received request.

The default HTTP port number is 80, but you can also change it to 8080 or other ports.

Three things to note about HTTP:

HTTP is connectionless: connectionless means that each connection is limited to processing only one request. After the server processes the client's request and receives the client's response, it disconnects. This method saves transmission time.

HTTP is media independent: this means that any type of data can be sent over HTTP as long as the client and server know how to handle the data content. Clients and servers specify the appropriate MIME-type content type to use.

HTTP is stateless: The HTTP protocol is a stateless protocol. Stateless means that the protocol has no memory ability for transaction processing. The lack of status means that if subsequent processing requires the previous information, it must be retransmitted, which may result in an increase in the amount of data transferred per connection. On the other hand, the server responds faster when it does not need previous information.

The following chart shows the HTTP protocol communication process:

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