Describe the setup in which a dual-homed host is used.  What are the limitations of this configuration?

What will be an ideal response?

Originally, the term dual-homed host was used for a computer equipped with two separate network interface cards (NICs), with one NIC for each interface. Now this term is used to describe the setup in which a firewall is placed between the network and the Internet. A dual-homed host provides only limited security because the firewall depends on the same computer used for day-to-day communication.  Therefore, any problem with the host computer weakens the firewall. The big disadvantage is that the host serves as a single point of entry to the network, so attackers have to break through only one layer of protection to infiltrate the network.