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Advantages & Disadvantages of Synchronous / Asynchronous Communications?

 

Asynchronous Communication


Advantages:
  • Requests need not be targeted to specific server.
  • Service need not be available when request is made.
  • No blocking, so resources could be freed. 
  • Could use connectionless protocol
Disadvantages:
  • Response times are unpredictable.
  • Error handling usually more complex. 
  • Usually requires connection-oriented protocol. 
  • Harder to design apps

Synchronous Communication


Advantages:
  • Easy to program
  • Outcome is known immediately 
  • Error recovery easier (usually) 
  • Better real-time response (usually)

Disadvantages:
  • Service must be up and ready.
  • Requestor blocks, held resources are “tied up”. 
  • Usually requires connection-oriented protocol




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