How Microservices Communicate? Sync vs Async. Direct vs Brokers And Event Busses

How should we design communication between microservices? Should it be synchronous or asynchronous? Should it be direct or through message brokers, event bussed, and gateways?

#Microservices

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🎬 What is microservices architecture?:    • What is microservices architecture?  

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▬▬▬▬▬▬ ⏱ Timecodes ⏱ ▬▬▬▬▬▬
00:00 Introduction To Microservices
01:50 Monoliths vs. Microservices
04:23 Communication Protocols
07:32 Receivers
10:54 Sync vs Async
16:42 Kubernetes As An Example Of Async Communication And Events