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The TCP 3-way handshake ensures reliable connection establishment between a client and server.

HTTPS is a secure version of HTTP that encrypts data for safety.

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

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

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

RPC allows one service to call a function in another service over the network.

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

L4 and L7 load balancers differ in how they route network traffic based on layers of the OSI model.

HTTP methods tell the server what to do, and status codes tell us the result.

DNS helps microservices find each other, but it has limitations that may require a service registry.

Keep-Alive allows reusing HTTP connections to improve efficiency and reduce overhead.