1. What roles does a firewall perform?2. Most enterprise networks use both host firewalls, such as Windows Firewall and network firewalls. Why would you want to use both?3. Which tool should you use to modify firewall rules on a Windows server?4. In the lab, you enabled a firewall rule that allowed users on an external network to connect to a Web server using HTTP. Which port is used for these connections?5. Can a host-based firewall help defend against malware and viruses?