One interface is connected to the internal or trusted network, while the other interface is connected to the external or untrusted network describes which architecture?

• A. Dual-Home Firewall
• B. Multi-Homed Firewall
• C. Data Interface
• D. Extranet

Answer: (A)

Two-network separation with a firewall placed between internal and external networks is described as a dual-homed firewall. The idea is that the firewall has two interfaces, each on a different security domain—one facing the trusted internal network and the other facing the untrusted external network—so all traffic between the two must pass through the firewall for filtering. While a multi-homed firewall can also have multiple interfaces, the scenario given uses exactly two networks, making dual-homed the precise term. A multi-homed setup might imply more than two networks or redundancy, not the specific internal-external pairing described. An extranet refers to extending private access to external partners, not to the firewall’s interface arrangement, and a data interface isn’t a recognized architectural label.