How do we know which is appropriate in a particular circumstance, for example how would you greet a;

·         Casual acquaintance : Hi

·         Your best friend: Hey there :)

·         Your Grandma: Hi, Hru

·         An old friend you have not seen for a long time: I havent seen you in ages , HRU?

In some ways computer systems are the same, communication between them relies upon agreed methods. These methods are called communication protocols.

The list below has some of the protocols that we have discussed before. Give an example of where they would be used.

·         TCP/IP-

·         http-

·         simple mail transfer protocol (smtp) - sending an email to another person via the internet

·         file transfer protocol  (FTP)- sending of files to another person via the internet.

·         html-

·         xml-