WAN

A WAN (Wide Area Network) is a network that connects multiple local networks (LANs) across large geographic distances, typically using ISP infrastructure. From a networking fundamentals perspective, a WAN involves routing, IP addressing, NAT, VPN tunnels, and important characteristics like bandwidth, latency, jitter and packet loss, plus mechanisms for quality management (QoS). For Audio/Video, Maker and Web disciplines, a WAN is the foundation for live streaming and file transfer, remote control of hardware or IoT devices, and making web servers and APIs reachable; each of these uses requires attention to latency, reliability and security over the WAN.

Example: a media company wants to produce a live multicamera broadcast where camera feeds from several cities are sent to a central studio. The audio/video engineer must account for WAN latency, jitter and bandwidth, and configures QoS and possibly a VPN or MPLS link to improve synchronization. At the same time a maker team in another region controls a robot and sensor network over the same WAN; they use secure tunneling and port forwarding to access devices and push OTA updates. A web developer publishes the accompanying web interface and APIs in the cloud so audiences and staff can retrieve data across the WAN; they also use CDNs, load balancing and monitoring to optimize performance and availability across multiple WAN links.