***Welcome to ashrafedu.blogspot.com * * * This website is maintained by ASHRAF***

Posts

    Latest Updates

    Thursday, April 6, 2023

    HTTP Protocols

    HTTP Protocols

    HTTP (Hypertext Transfer Protocol) is the underlying communication protocol of World Wide Web. HTTP functions as a request–response protocol in the client–server computing model.

    HTTP has four versions — HTTP/0.9, HTTP/1.0, HTTP/1.1, and HTTP/2.0. The common version in use is HTTP/1.1 and the future will be HTTP/2.0.

    HTTP/0.9 — The One-line Protocol

    • It is initial version of HTTP, a simple client-server, request-response, telenet-friendly protocol
    • Request nature is single-line (method + path for requested document)
    • Methods supported by this version is GET only
    • Response type is hypertext only
    • Connection  is terminated immediately after the response
    • No HTTP headers (cannot transfer other content type files), No status/error codes, No URLs, No versioning

    HTTP/1.0 — Building extensibility

    • Browser-friendly protocol
    • Provided header fields including rich metadata about both request and response (HTTP version number, status code, content type)
    • Response is not limited to hypertext (Content-Type header provided ability to transmit files other than plain HTML files — e.g. scripts, stylesheets, media)
    • Methods supported are GET , HEAD , POST
    • Connection is terminated immediately after the response

    HTTP/1.1 — The standardized protocol

    • This is the HTTP version currently in common use.
    • Introduced critical performance optimizations and feature enhancements — persistent and pipelined connections, chunked transfers, compression/decompression, content negotiations, virtual hosting (a server with a single IP Address hosting multiple domains), faster response and great bandwidth savings by adding cache support.
    • Methods supported are GET , HEAD , POST , PUT , DELETE , TRACE , OPTIONS
    • Connection is long-lived

    HTTP/2.0

    With Upgrade header introduced in HTTP/1.1, it is possible to start a connection using a commonly-used protocol, such as HTTP/1.1, then request that the connection switch to an enhanced protocol type like HTTP/2.0 or WebSockets.

    HTTPS

    Hyper Text Transfer Protocol Secure (HTTPS) is the secure version of HTTP. It uses SSL/TLS for secure encrypted communications.

    An HTTPS connection can protect the data transfer from the man-in-the-middle attacks and common security threats by providing bidirectional encryption for communications between a client and server.

    Although HTTPS is secure by its design, the SSL/TLS handshake process consumes a significant time before establishing an HTTPS connection. It normally costs 1–2 seconds and drastically slows down the startup performance of a website.

     

     

    No comments:

    Post a Comment

    Network session analysis

    Network session analysis Network session analysis is a method of monitoring network activity and availability to identify issues, such as ...