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Do you know?


               TCP/IP was developed in 1978 and driven by Bob Kahn and Vint Cerf.



        Some Common TCP/IP protocols
          HTTP: It is a protocol that is used to transfer information on the  orld  ide  eb. It defines how messages
           are formatted, transmitted and what action web servers and browsers should take in response to various
           commands. Its main purpose is to provide a way to display and retrieve   M  pages. It is a re uest
           response protocol between clients and server. The originating client, such as a web browser is referred to

           as the user agent.  he server which stores or creates resources such as   M  files and images is called the
           origin server. In between the user agent and origin server, there may be several intermediaries, such as
           proxies  gateways  tunnels  etc.      is called a stateless protocol because it does not keep the previously
           executed command in memory.

              S:  sed between a web client and a web server  to secure data transmissions. Often used for sending
           credit card transaction data or private data from a web client  i.e.  Internet browser on a computer  to a web
           server.


        UDP/IP
        The User Datagram Protocol does not ensure that all packets are delivered and remain in order. It doesn’t
        establish a connection before beginning or receiving transmissions. It is an alternative to     I  that sacrifices
        reliability for speed and simplicity.

        UDP/IP is usually utilised for streaming audio or video, as the risk of dropped packets is outweighed by the
        need to keep the transmission real-time.


            INSTANT MESSAGING

        Instant Messaging  IM  refers to instantaneous exchange of messages between the sender and and receiver
        on Internet. Instant Messaging takes place with specially developed applications, like Google Chat, Skype,
         ike    e hat   Facebook  Messenger    hats pp   etc.  Other  than  text  messages   many  instant  messaging
        applications enable file transfer  audio chat  video calling  etc. Instant messaging software is widely used for
        the personal as well as commercial use.
        Unlike email, instant messaging takes place in real-time and the response from the participants are spontaneous.
        If the receiver is online, message is received as soon it is sent. In Instant Messaging, text messages can be sent
        to one or more persons at a time. The message history is recorded for future too.


         o use an instant messaging application  a user must create his  I    identity or account  to open his account
        whenever needed. Some instant messaging application such as  oogle  angout   ahoo  Messenger  and
         indows  ive Messenger uses email addresses for managing the account and software app such as  hats pp
        Skype are used with name or numbers as identity.









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