On Jun 16, 2004, at 5:00 PM, Mikel King wrote: > smoke signals, Teletype, or tin cans with string? Interesting. Might be worth exploring for a given network for meta-services, According to OSI Network layer hierarchy, Smoke Signals and Teletype Machines, and Tin Cans; all fall under, Physical Layer (1) String, (for Tin Cans): Data Link Layer(2) hrm... Rocket- .ike