HTTP is a request-response protocol for communication between clients and servers on the internet. A client, such as a web browser, sends an HTTP request to the server hosting a web resource and the server responds with the resource or an error message. HTTP uses TCP/IP as its transport protocol and identifies resources using URLs. The development of HTTP standards is overseen by organizations like the W3C and IETF.
HTTP is the protocol used to deliver web pages over the internet. It uses a request/response model where clients make HTTP requests to servers, which respond with HTTP responses. Common HTTP request methods include GET, POST, PUT, DELETE, and HEAD. A request contains an initial line specifying the method, URL, and protocol version. A response contains a status line with the protocol version, status code, and description. Common status codes include 2xx for success, 3xx for redirects, 4xx for client errors, and 5xx for server errors.
This document provides an overview of the HTTP protocol. It discusses that HTTP has been used by the World Wide Web since 1990 to enable communication between web browsers and servers. It describes some popular web servers like Apache and clients like Firefox. It explains the basic operation of HTTP including requests with methods like GET and responses with status codes. It also discusses URLs, URIs, and different versions of HTTP from 0.9 to 1.1.
This document summarizes a lecture on computer networks and the hypertext transfer protocol (HTTP). It first reviews the early history of computer networking and the development of the world wide web. It then provides details on HTTP, including requests and responses, methods, status codes, and cookies. It discusses how caching works to improve performance by satisfying requests locally when possible. Methods like If-Modified-Since are described which check if a cached object has been updated before retrieving from the origin server.
HTTP is a stateless protocol that uses a request/response model for communication. A client sends a request via a URL to a server, which responds with status codes and content. Common request methods include GET, POST, PUT, DELETE. Responses have status codes like 200 for success and 404 for not found. Caching of responses helps improve performance. HTTPS provides encryption for secure communication via SSL/TLS certificates.
HTTP is the protocol that powers the web. It uses a request-response model where clients make requests that servers respond to. Common request methods include GET, POST, HEAD, PUT, DELETE, and OPTIONS. Responses include status codes like 200 for OK and content types. HTTP 1.1 added features like persistent connections and chunked encoding. Cookies are used to maintain statelessness. HTTPS uses SSL/TLS to secure HTTP connections with encryption, server authentication, and integrity.
This document discusses the Hypertext Transfer Protocol (HTTP) and how it enables communication on the World Wide Web. It begins by explaining some key concepts like URLs, web pages, and objects. It then describes how HTTP uses a client-server model where clients like web browsers make requests to servers, which respond with requested objects. The document outlines both non-persistent and persistent HTTP, how they establish TCP connections, and how persistent HTTP can improve performance. It also examines HTTP request and response messages, status codes, and how cookies can be used to maintain state across client-server interactions.