Syllabus 

Types and characteristics of communication protocols including;                12 ATAR

  • TCP/IP Transmission Control Protocol/Internet Protocol
  • HTTP HyperText Transfer Protocol
  • HTTPS HyperText Transfer Protocol over secure socket layer
  • WAP Wireless Application Protocol

Background

  • For a network to work correctly it needs to have rules to make the system work. 
  • These rules are called protocols. for example when you type in a web address, it is the HTTP protocol that is working
  • A protocol is a set of rules that allow a computing device to communicate with another computing device

TCP/IP - Transmission Control Protocol / Internet Protocol

  • is the standard to connect to a web server
  • is the standard that divides your expected webpage into smaller 'packets'
  • gives an address for each packet
  • gets sent
  • is the standard for receiving a webpage
  • it does error checking to make sure some of the packets aren't missing
  • it reassembles the 'packets' into the correct sequence for the expected webpage
  • now the browser is ready to display the webpage, BUT, we need HTTP for that

HTTP - HyperText Transfer Protocol

  • is the standard to transfer hypertext
  • HTTP is the request, response protocol
  • a client requests, yes via typing http...    into the web address bar
  • if the web server can proceed with the request, ie the web address is correct, it will send the page
  • if the server cannot proceed with the request, ie the web address is wrong, it will send an error page 404 page not found

HTTPS - HyperText Transfer Protocol Secure (Secure Socket Layer-SSL)

  • is the standard to transfer hypertext, but with a secure connection
  • it is secure because data passes within a connection encrypted by SSL
  • a web server will authenticate to see if the password, called a digital certificate public/private key matches,
  • if this key setup matches, it remains secure and you can get into the webpage

WAP - Wireless Application Protocol

  • is the standard to access data over a mobile wireless system
  • it can access all operating systems, on all mobile devices such as smartphones, tablets, laptops
  • Wireless Markup Language (WML) delivers the content to the smaller display screens
  • WML is similar to HyperText Markup Language

 For You To Do

  1. What is a protocol?
  2. How is HTTP different from  HTTPS?
  3. How does TCP/IP work?
  4. How does HTTP work?
 Learn more from TCP/IP at wikipedia, HTTP at wikipedia, HTTPS at wikipedia, WAP at wikipedia, SSL explained at digicert.com.SSL more
 
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