What is the minimum number of network connections in a multihomed firewall?

What is the minimum number of network connections in a multihomed firewall?

• A. One
• B. Three
• C. Two
• D. Four

Answer: (C)

Multihoming means a device is connected to more than one network path, typically via separate upstream connections to different providers. To achieve that, you need at least two distinct external links. With two external connections, traffic has two independent routes to the Internet, enabling failover if one link or provider goes down and allowing possible load sharing between the paths. If there were only a single external link, the setup wouldn’t be multihomed; it would be single-homed. In practice, the firewall would also have an internal interface to reach the protected network, so a common deployment ends up with at least three interfaces, but the minimum for multihoming itself is two external connections.

Multihoming means a device is connected to more than one network path, typically via separate upstream connections to different providers. To achieve that, you need at least two distinct external links. With two external connections, traffic has two independent routes to the Internet, enabling failover if one link or provider goes down and allowing possible load sharing between the paths. If there were only a single external link, the setup wouldn’t be multihomed; it would be single-homed. In practice, the firewall would also have an internal interface to reach the protected network, so a common deployment ends up with at least three interfaces, but the minimum for multihoming itself is two external connections.