Inexpensive, not Reliable (4)
Transit cost: $500/megabit/second/month at 40% utilization = $0.50/gigabit.
Reliable exchange cost: $10,000/month for 100 megabits/second at 15% utilization = $0.40/gigabit.
Unreliable exchange cost: $500/month for 100 megabits/second at 50% utilization = $0.005/gigabit.