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Message queues allow services to communicate asynchronously, improving scalability and reliability.

Message delivery semantics define how messages are sent in distributed systems and handle failures.

Microservices can communicate using five key patterns based on their needs.

Request-Response asks for a result, while Events notify that something has happened.

gRPC supports four communication patterns: Unary, Server Streaming, Client Streaming, and Bidirectional Streaming.

Synchronous communication waits for a response, while asynchronous continues without waiting.

REST, RPC, and gRPC are different methods for communication in software systems.

The Transactional Outbox Pattern ensures database updates and event publishing are synchronized to avoid losing events.

Protobuf schema evolution requires careful changes to avoid breaking existing clients.

gRPC allows efficient communication between services using a structured request-response model.

Distributed backpressure helps manage the flow of work between services to prevent overload.

The Bulkhead Pattern isolates resources to protect critical workloads from failures.

Microservices and modular monoliths differ mainly in deployment and communication methods.

API Gateway, Proxy, and Load Balancer serve different roles in managing requests and traffic in systems.