Which is a function of an operating system?

Which company offers a free firewall that provides basic ingress and egress filtering?

A. Check Point B. IBM C. ZoneAlarm D. Barracuda

What does the firewall do about packets that it suspects (but cannot prove) are attack packets?

A. It will challenge the sender of the packet B. It will pass the packet C. It will drop the packet D. It will quarantine the packet