A network obviously contains personal information of the users or something that is very confidential for the concerned organizations. There are many unauthorized attempts that can be made by hackers to STEAL such information. For EXAMPLE the future plan of one company can be leaked to its competitors who can take the advantage of the same in advance. Thus securing a network is IMPORTANT. This can be DONE by using Network Firewall, Antivirus software, IMPOSING limits on data and through several other approaches. 

A network obviously contains personal information of the users or something that is very confidential for the concerned organizations. There are many unauthorized attempts that can be made by hackers to steal such information. For example the future plan of one company can be leaked to its competitors who can take the advantage of the same in advance. Thus securing a network is important. This can be done by using Network Firewall, Antivirus software, imposing limits on data and through several other approaches.