Question

A(n) _____ is a combination of hardware and software that acts as a filter or barrier between a private network and external computers or networks.

1) rootkit
2) intrusion detection system
3) firewall
4) electronic tracker

Answer 1

A firewall is a combination of hardware and software that acts as a filter or barrier between a private network and external computers or networks.

Step-by-step explanation:

A firewall is a combination of hardware and software that acts as a filter or barrier between a private network and external computers or networks. It helps to protect the private network by controlling incoming and outgoing network traffic based on predetermined security rules.