Host model

Strong Host Model is an option of designing TCP/IP stack on networking Operating System like Microsoft Windows or Linux and so on.

If you implement your IP stack with Weak Host Model, it accepts any locally destined packet regardless of the network interface on which the packet was received.

If you implement you IP stack with Strong Host Model, it only accepts locally destineed packets if the destination IP address in the packet matches an IP address assigned to the network interface on which the packet was received.

The weak host model provides better network connectivity (ex. you can easily find any packet arriving at your host by ordinary tools ), but it also makes hosts susceptible to multihome-based network attacks.