Wide Area Networks (WANs) primarily use point-to-point, hub-and-spoke, and mesh topologies. These configurations suit large-scale connections across cities or countries, where reliability and scalability matter most. Local networks like LANs rarely need them due to simpler setups.

Point-to-Point Topology

This links two nodes directly, like a private line between offices.
WAN providers use it for secure, dedicated bandwidth in scenarios such as branch-to-headquarters links or telecommuting setups.

Example : A bank connecting ATMs to a central server—simple, low-latency, but doesn't scale easily for many sites.

Hub-and-Spoke Topology

A central "hub" (like a data center) connects to multiple "spoke" sites, routing all traffic through it.
Airlines optimize flights this way, and WANs use it for cost savings when full connectivity isn't needed—think corporate branches linking to HQ via VPNs.

Traffic funnels efficiently but risks hub failure; recent 2025 trends favor it for SD-WAN in hybrid work.

Mesh Topology

Every node connects to others (full mesh) or many (partial), creating redundant paths.
Military ops, smart cities, and disaster response rely on it for unbreakable reliability—data reroutes if a link fails.

Real-world use : IoT in factories or Google WiFi meshes for homes, scaling to thousands of devices without bottlenecks.

Topology| Best For| Drawbacks| Example Networks
---|---|---|---
Point-to-Point| Simple, secure links 6| No scalability 2| WAN leased lines
Hub-and-Spoke| Centralized control 4| Single failure point| Enterprise VPNs
Mesh| High redundancy 1| Costly cabling 3| Military, IoT WANs 7

TL;DR : WANs dominate these topologies for geographic spread; pick based on redundancy needs versus cost.**

Information gathered from public forums or data available on the internet and portrayed here.