What is a WAN?
A WAN is a communication network that spans large geographical areas—across cities, countries, or even continents. WANs connect local area networks (LANs) into a unified communication structure and are fundamental to enabling global connectivity.
How does a WAN work?
WANs are built by interconnecting multiple LANs using different communication technologies, such as:
- Fiber-optic backbone networks: Provide high capacity and low latency between geographically distributed data centers
- MPLS (Multiprotocol Label Switching): Ensures stability, predictable routing, and traffic prioritization
- VPN (Virtual Private Network): Provides secure remote access to corporate networks over public infrastructure
- Satellite communication: Enables connectivity in areas without mobile or fiber infrastructure
WAN design is critical for business communication and is used in everything from industrial remote installations to global enterprises.