Many organizations and even consumers use this to control access to a network like the internet, allowing only authorized traffic to pass. a) encryptionb) vpnc) firewalld) anonymizing toolse) filtering

c) Firewall

Explanation:

Firewall

For using the computer , firewall is installed , it is a network security system , which helps to monitor the incoming and the outgoing network traffic on the basic of some security rule .

The firewall act as a barrier between the untrusted external network and the trusted internal network .

So , it is used by consumers to control the access to any network .