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  Service Mesh (Istio): The Complete Guide to Microservices Networking 📅 Published: September 2026 ⏱️ Estimated Reading Time: 18 minutes 🏷️ Tags: Service Mesh, Istio, Microservices, Networking, Kubernetes, DevOps Introduction: What is a Service Mesh? A service mesh is a dedicated infrastructure layer for handling service-to-service communication in a microservices architecture. It provides a uniform way to manage network traffic, security, and observability across all services. Think of a service mesh as a transparent network overlay that sits between your services. It intercepts all network traffic and applies policies without requiring changes to your application code. Why service meshes matter: Traffic management : Load balancing, routing, retries, timeouts Security : mTLS encryption, authentication, authorization Observability : Metrics, logs, distributed tracing Resilience : Circuit breaking, fault injection, rate limiting Policy enforcement : Fine-grained access control Pa...