An example of dual-homed devices are enthusiast computing motherboards that incorporate dual Ethernet network interface cards.
This feature was designed to provide telecommunications grade reliability and redundancy to Ethernet networks.
Firewall dual-homing provides the first-line defense and protection technology for keeping untrusted bodies from compromising information security by violating trusted network space.
Dual-homed is a general term for proxies, gateways, firewalls, or any server that provides secured applications or services directly to an untrusted network.
[3] Dual-homed hosts can act as firewalls provided that they do not forward IP datagrams unconditionally.