Application/Telnet objects generate packets in one of two ways.
If the member variable interval_ is non-zero,
then inter-packet times are chosen
from an exponential distribution with average equal to interval_.
If interval_ is zero, then inter-arrival times are chosen
according to the tcplib distribution (see tcplib-telnet.cc).
The start method starts the packet generation process.
Tom Henderson
2011-11-05