Which device is described as a node with multiple NICs that connects to two or more networks, increasing the efficiency and reliability of an IP network?

Which device is described as a node with multiple NICs that connects to two or more networks, increasing the efficiency and reliability of an IP network?

• A. DMZ
• B. Bastion Host
• C. Multi-homed Firewall
• D. Software Firewall

Answer: (C)

Connecting a device to more than one network with separate NICs is called multi-homing. A firewall that is multi-homed has interfaces on two or more networks (for example, internal and external) and filters traffic between them. This setup improves efficiency and reliability by providing direct network paths while enforcing security across boundaries, and it adds redundancy if one link or interface fails. The other options don’t describe a device that intentionally spans multiple networks: a DMZ is a network segment exposed to untrusted networks; a Bastion Host is a hardened server placed in a DMZ to provide services; a Software Firewall is firewall software running on a single host.

Connecting a device to more than one network with separate NICs is called multi-homing. A firewall that is multi-homed has interfaces on two or more networks (for example, internal and external) and filters traffic between them. This setup improves efficiency and reliability by providing direct network paths while enforcing security across boundaries, and it adds redundancy if one link or interface fails. The other options don’t describe a device that intentionally spans multiple networks: a DMZ is a network segment exposed to untrusted networks; a Bastion Host is a hardened server placed in a DMZ to provide services; a Software Firewall is firewall software running on a single host.