Advantages	Disadvantages
Messages can be sent very quickly to anyone else on the network Sharing of data or information is private and confidential These are similar to those of  LAN's except the scale of sharing etc. becomes far greater and can be world-wide	Again these are similar  to those of LAN's except that issues such as security become even more important as potential hackers could break into a computer system from anywhere in the world rather than having to physically be in a building Encryption of secure data such as financial transactions is necessary because it even easier to capture data