Types of Communication and there functionality

Email
E-mail is the fastest and most functional way to send a message to someone (as long as they have a computer with internet access) The advantages of E-mail include: you can send and receive attachments such as music files or word documents, its lightning quick and it can be up to 200,000 characters long.

Text message (SMS)
Text messages are the fastest way to send and receive messages on the move. A text message can be sent and received anywhere there is network coverage. The downside of texting is you can only have 160 characters and the only attachments that can be sent are pictures and very short video.

Instant Messaging
This is the best way to speak directly in real time over long distances (apart from telephone) the advantages are it is has no cost and it is instant. You can also send and receive any type of file or document. The disadvantages are that you can only speak to someone when there online.