AJAX is a technique for accessing web servers from a web page using a combination of XMLHttpRequest objects, JavaScript, and HTML DOM to create fast and dynamic web pages without reloading. Server-sent events allow a web page to automatically receive updates from a server, sending data to the client as it is available without the client requesting it. Web sockets provide full-duplex real-time communication over a single TCP connection between a web client and server, enabling both sides to continuously send data to each other.

1.  AJAX
 SERVER SENT EVENTS
 WEB SOCKETS

2.  AJAX = Asynchronous JavaScript And XML.
 AJAX is not a programming language.
 AJAX is a technique for accessing web servers from a web page.
 Creates Fast And Dynamic web Pages
 AJAX just uses a combination of:
- XMLHttpRequest object (to request data from a web server)
- JavaScript and HTML DOM (to display or use the data)

3. HOW AJAX WORKS…?

4.  A server-sent event is when a web page automatically gets updates from a
server.
 The web page would have to ask if any updates were available
 With server-sent events, the updates come automatically
 Supported by Opera, Firefox, Chrome and Safari.
 Not Supported By Internet Explorer.
 Examples: Facebook/Twitter updates, stock price updates, news feeds, sport
results, etc.

5. HOW SERVER SENT EVENT WORKS…?

6.  It is a communication technology
 Real time communication between client and server.
 Provide full-duplex communication channels over a single TCP connection
 Enables interaction between web client (browser) and web server
 A persistent connection between the client and the server.
 Both can send data at anytime

7. THANK YOU.