Disclosed is an architecture for automating testing tasks, which would otherwise have to be done manually using actual hardware, by providing the capability to dynamically create many types of networked computing devices with different network configurations, eliminating the need to have actual test machines physically networked. Virtual endpoints are virtual computing devices networked to virtual adapters on a real computer. The virtual endpoints architecture comprises a miniport driver, a filter engine, virtual networked computing devices, a virtual stack, and a user mode to kernel mode interface. The virtual endpoints architecture technology can be used to test bridge and Internet connection sharing features as well as for testing any NDIS driver or client/server application. The virtual endpoints architecture lowers the cost of testing and allows for the ability to run the aforementioned types of tests in a batch nodal stress suite and without the need for large test network topologies.