Technology is developing very fast. Computers are found in most households and are a must in businesses. Most of these computers are connected to the Internet, which leads to a more comfortable life. The Internet offers services 24 hours a day 7 days a week, and allows you to benefit from these services from the comfort of your home – of course provided you have access to the Internet. Some very common services include:
 Buying products online
Buying services online
Bank transactions However, is the Internet secure enough to send important, sensitive and personal information, across? Unfortunately, the Internet itself does not offer any security measures, and anyone can access your data. This is the reason why several network security schemes were developed and used throughout the years. Some threats or breaches to networks include:
Data diddling: changing existing data before it is input into an application or system.
Salami attack: a number of small crimes that when put together will make up a large crime.
Piggybacking: an unauthorised user logs on to a network using an authorised user's login information. This can be prevented by logging off before getting up from your computer.
Denial of Service (DoS): This attack floods a network with huge amounts of annoying data so that "regular traffic" is stopped or slowed down considerably.
Distributed Denial of Service (DDoS): this is the same as DoS, but computers which have been infected are used to send out additional messages, thus increasing the amount of unwanted traffic.
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