Future Business Leaders of America (FBLA) Cybersecurity Practice Test

Which of the following describes a dual-homed host?

1. A type of VPN using private connections

2. A firewall with multiple public interfaces

3. A firewall with two network interfaces

4. A standalone server without any external connections

The correct answer is: A firewall with two network interfaces

A dual-homed host specifically refers to a network device or host that has two network interfaces, allowing it to connect to two different networks. This setup is commonly used in firewalls, where one interface connects to an internal network and the other connects to an external network, such as the internet. This dual connection enables the host to provide enhanced security functions by controlling and filtering the network traffic that enters and exits either side. The significance of having two interfaces is that it allows the dual-homed host to act as a gateway between the two networks, applying security policies and protocols as necessary. This functionality is crucial in preventing unauthorized access and providing network segmentation. In contrast, the other options represent different network configurations or concepts that do not specifically describe a dual-homed host. For instance, options discussing VPNs or firewalls with multiple public interfaces do not emphasize the distinct characteristic of having two network interfaces, which is the essence of a dual-homed host. A standalone server without external connections lacks the networking aspect that defines a dual-homed host.