[ns] Different ways to generate random motion

[shshah@cairo.cs.uiuc.edu]

Hi, 

I am slightly confused between the different ways of generation of random
motion of mobile nodes. Could someone please explain to me the differences
between the motion generated for an individual node by the following
methods:

1. By using setdest (motion generated for any particular node 'k' in the
   scenario)
2. By saying $node_($k) random-movement 1
3. By the method described in Section 15.1.2 of the NS Users Manual,
   namely:
	Use the primitive $mobilenode start followed by routined updates
	to change the direction/speed of the node. 

Thanks and regards,
Samarth.