Nowadays almost all the organizations, no matter how big they are, do use internet for communication, cooperation and creation of new incomes. But the internet connection can mean a threat such as hackers and possible steal of information. Those threats are growing more and more nowadays. Virus can get into system trough different ways. Most common ways of virus transfer into companies system us with programs, transferred and installed trough internet, with USB keys, with optical media or with floppies. Virus, which is searching for security holes in our network, can be disabled with the use of firewall.
Keywords: antivirus, networks, protection, Internet, security, virus.