<P> In computing , a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules . A firewall typically establishes a barrier between a trusted internal network and untrusted external network , such as the Internet . </P>
<P> In computing , a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules . A firewall typically establishes a barrier between a trusted internal network and untrusted external network , such as the Internet . </P>
fire wall is used in communication to save from
fire wall is used in communication to save from
untrusted external network
untrusted external network