1. Supplier / Consumer communications model 1.One supplier / one consumer 2.Many suppliers / one consumer 3.One supplier / many consumers 4.Many suppliers / many consumers

2. Groups by Coupling Coupled in timeUncoupled in time Coupled in space Uncoupled in space

3. Coupled in time… Strong coupling –Supplier and consumer both know the state of the other –Communication synchronizes supplier and consumer Weak coupling –Supplier and consumer both know the state of the other

4. Coupling in Space Supplier knows the specific consumer address and port

5. One Supplier / One Consumer Coupled in space, coupled in time –Strong time: UDP –Weak time: TCP Uncoupled in space, coupled in time –?? Coupled in space, uncoupled in time –?? Uncoupled in space and time –??

6. Many Suppliers / One Consumer Coupled in space, coupled in time –?? Uncoupled in space, coupled in time –?? Coupled in space, uncoupled in time –?? Uncoupled in space and time –??

7. One Supplier / Many Consumers Coupled in space, coupled in time –?? Uncoupled in space, coupled in time –?? Coupled in space, uncoupled in time –?? Uncoupled in space and time –??

8. Many Suppliers / Many Consumers Coupled in space, coupled in time –?? Uncoupled in space, coupled in time –?? Coupled in space, uncoupled in time –?? Uncoupled in space and time –??