Network security consists of the policies and practices adopted to prevent and monitor the unauthorized access, misuse, modification or denial of a network of computers and resources accessible to the network. Having un-authorized access to a network my break the organisation law, and user my suffer from Legal Custody.
The security of the network implies the Law full authorization of access to data in a network, which is controlled by the administrator of the network. Users choose or are assigned an identification and password or other authentication information that allows them to access information and programs within their authority.
Network security covers a variety of computer networks, both public and private, that are used in day-to-day work; Realization of transactions and communications between companies, government agencies and individuals. Networks can be private, such as within a company, and others that can be open to public access. The security of the network is involved in organizations, companies and other types of institutions. It does what its title explains: it secures the network, besides protecting and supervising the operations that are carried out. The most common and easiest way to protect a network resource is by assigning it a unique name and a corresponding password.