Networking

Apr 30, 2026 Alibaba Cloud Full Stack 52 min read

Alibaba Cloud Full Stack (3): VPC, SLB, and the Network Layer

Build a production network from scratch: VPC architecture, CIDR planning, VSwitches across availability zones, security groups as stateful firewalls, SLB for load balancing, NAT Gateway for outbound traffic, and EIP for …

Jul 12, 2025 System Design 28 min read

System Design (2): DNS, CDN, and Load Balancing — The First Three Hops

Every web request begins with DNS resolution, may traverse a CDN edge, and lands on a load balancer before reaching your application. Understanding these three hops is essential to building systems that are fast, …

Jun 19, 2023 Docker and Containers 28 min read

Docker and Containers (4): Networking and Volumes — How Containers Talk and Persist

Containers are ephemeral by default — they lose data when deleted and run in isolated networks. Volumes and networks are the two mechanisms that connect containers to the persistent, communicating world.