Question

What is used to protect network from outside internet access?

(a) A trusted antivirus

(b) 24 hours scanning for virus

(c) Firewall to separate trusted and untrusted network

(d) Deny users access to websites which can potentially cause security leak

I have been asked this question during an interview for a job.

My enquiry is from Security in division Security of Operating System

Answer 1

Right answer is (c) Firewall to separate trusted and untrusted network

To explain: Firewall create a protective barrier to secure internal network. An antivirus can only detect harmful viruses but cannot stop illegal access by remote attacker.