Today, computer security comprises mainly "preventive" measures, like firewalls or an exit procedure. A firewall can be defined as a way of filtering network data between a host or a network and another network, such as the Internet, and can be implemented as software running on the machine, hooking into the network stack (or, in the case of most UNIX-based operating systems such as Linux, built into the operating system kernel) to provide real time filtering and blocking. Another implementation is a so-called physical firewall which consists of a separate machine filtering network traffic. Firewalls are common amongst machines that are permanently connected to the Internet.
Today , computer security comprises mainly " preventive " measures , like firewalls or an exit procedure . A firewall can be defined as a way of filtering network data between a host or a network and another network , such as the Internet , and can be implemented as software running on the machine , hooking into the network stack ( or , in the case of most UNIX - based operating systems such as Linux , built into the operating system kernel ) to provide real time filtering and blocking . Another implementation is a so - called physical firewall which consists of a separate machine filtering network traffic . Firewalls are common amongst machines that are permanently connected to the Internet .
Firewalls and exit procedures are considered what?
Firewalls and exit procedures are considered what ?
"preventive" measures
"preventive" measures