Cloud and Data Center

Networking Basics for Cloud and Data Center Engineers Networking is the backbone of both cloud and data center work. A solid foundation helps you plan, build, and operate reliable networks that support apps, databases, and users around the world. Start with simple ideas: hosts connect to switches, switches forward traffic, routers move data between networks, and security devices protect the flow. Core concepts include a layered view, clear device roles, and common protocols. Understand who does what at L2 (switching) and L3 (routing), why subnets matter, and how VLANs separate traffic for safety and performance. A small diagram or map of your network can reduce confusion later. ...

Network virtualization and software-defined networks Network virtualization and software-defined networks (SDN) are reshaping how modern networks are built and managed. They aim to reduce complexity, improve agility, and enable multi-tenant environments without buying every device individually. In simple terms, virtualization makes networks programmable and scalable, while SDN puts the brain of the network in software. What is network virtualization? It creates virtual networks on top of physical hardware. Overlays and virtual switches let many tenants share the same physical links, with isolation and policy control. This makes it easier to test new designs, move workloads, or deploy new services without rewiring cables. ...