Delivery, nonself-movement, can achieve movement of a virus from S to D by delivery of storage media including ROM and hard disks. A virus with wandering property released from node S begins to move from the node to a randomly selected adjacent node A , or B . Since the virus arrived at A or B , the virus also would show same movements that it moves to any other adjacent nodes. The movements will be continued unless all the resources run out thus no more space to move or all viruses are detected and eliminated. Although wandering has neither any destination nor intent to arrive at D in movements, a trip from S to D is still occurred by coincidence, even a trip along the best S-D path.
Movements stop upon arriving at the destination.
Trip from S to D is intent. Selecting the best path from the S-D paths for the route. The high probability in accomplishing trips from S to D . In cruise, S , source, is a vertex from which movements begin, and D is a vertex, the destination at which the movements end. Another difference is the probability of accomplishing trips from S to D , however, blind cruise may exhibit same probability of cruise as high as cruise only by chance.