Which of the following firewalls filters ports and system service calls on a single computer operating system?
- Network address translation firewall
- Transport layer firewall
- Host-based firewall
- Network layer firewall
- Application layer firewall
Explanation: A host-based firewall is specifically designed to run on a single computer with the purpose of protecting that one device by filtering ports and system service calls on its operating system. Other firewall types, such as network layer or transport layer firewalls, typically focus on filtering external network traffic based on IP addresses or connection states.
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