Review Questions

You can find the answers in Appendix A.

1. In general, firewalls work by ___________________.

A. Rejecting all packets regardless of security restrictions

B. Forwarding all packets regardless of security restrictions

C. Allowing only packets that pass security restrictions to be forwarded

D. None of the above

2. In which layer of the OSI model do software firewalls operate? (Choose all that apply.)

A. Application

B. Presentation

C. Physical

D. Network

3. What is the main difference between a network-based firewall and a host-based firewall?

A. A network-based firewall protects the Internet from attacks.

B. A network-based firewall protects a network, not just a single host.

C. A network-based firewall protects the network wires.