{@link com.jme3.network.kernel.Kernel} defines the core of a server-side message broker that abstracts away the specific transport and underlying threading model used. For example, it might use NIO selectors in a single threaded model or straight multithreaded socket model. Or it might implement SSL connections. Once created, {@link com.jme3.network.kernel.Kernel} users don't need to care about the details.
{@link com.jme3.network.kernel.Endpoint} is a managed connection within a {@link com.jme3.network.kernel.Kernel} providing kernel to client connectivity.
{@link com.jme3.network.kernel.Connector} defines the basic client-side message sender and these objects are typically used to connect to a {@link com.jme3.network.kernel.Kernel} though they can connect to any network port that supports the implementation's protocol. Implementations are provided for straight TCP and UDP communication and could be extended to support SSL or different threading models.