protocol ..local remote

1.An event occurence at remote site ... reflected by arrival of a packet at local machine can cause
2.reaction:
1.Some memory allocated in the local machine protocol layers to be freed/or new allocated
2.Some variable values will be modified
3.Packets coming from the upper layer is discarded , queued or it is morphed and forwarded
4.Packets are routed in a different channel other than normal
5.states are changed(some variables are changed)