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PAN, LAN, MAN, and WAN: Networks by Scale, Explained

The word "network" can mean anything from a few centimeters around your wrist to the entire planet -- here's how the scale-based categories break down.

  1. PAN: Personal Area Network

    The smallest network, connecting personal devices within a range of a few meters. Bluetooth earbuds, a smartwatch, and NFC payments are classic examples of one person's own devices talking to each other, often without any router involved at all.

  2. LAN: Local Area Network

    A LAN connects devices within a relatively small physical space, like a home, office, or single school building. The computers, phones, and smart TV connected to a home Wi-Fi router are all on the same LAN, and most LANs use private IP address ranges.

  3. CAN: Campus Area Network

    A mid-sized network that links the LANs of several buildings on a single site, such as a university campus or a multi-building company complex. Each building runs its own LAN, but fiber or other backbone links tie them together into one manageable network.

  4. MAN: Metropolitan Area Network

    A network spanning a single city or a similarly sized region, connecting multiple LANs and CANs. A telecom provider's network linking its branch offices, data centers, and cell towers across one city is a typical example.

  5. WAN: Wide Area Network

    The broadest network category, spanning countries or continents. A WAN is essentially many MANs and LANs connected together, and the internet itself is often described as a "network of networks" made up of the world's WANs interlinked.

  6. Comparing scale at a glance

    Scale increases roughly as PAN (a few meters) -> LAN (one building) -> CAN (a campus or complex) -> MAN (a city) -> WAN (a country or continent). As the scope widens, who manages the network shifts from an individual to telecom carriers and larger operators, and the cabling shifts from privately owned wiring to a carrier's backbone infrastructure.

  7. This is a different axis from network topology

    Scale-based categories (PAN, LAN, MAN, WAN) describe how far a network reaches. Topology terms like star, bus, and mesh describe the shape in which devices are wired together. These are independent dimensions -- a single LAN can still be wired in a star topology, for instance.

Topology answers a different question than scale does

Knowing a network is a LAN tells you nothing about how its devices are physically or logically wired together -- that's what topology describes. A star topology (everything connects to a central switch), a bus topology (devices share one line), and a mesh topology (many redundant links between devices) can all exist inside a network of any scale, from a small LAN to a citywide MAN.

How separate WANs end up connected as one internet

The internet works because independently operated networks agree to exchange traffic with each other using a shared routing protocol (most commonly BGP, the Border Gateway Protocol) at the boundaries between their networks. Without that agreed-upon routing layer, each organization's WAN would be an isolated island rather than part of a single global internet.

Frequently Asked Questions

Does a company VPN fit into this scale-based classification?

Not really -- a VPN isn't a scale category on its own. It's better described as a technology that builds an encrypted tunnel on top of an existing WAN (the internet). Physically the traffic still crosses a WAN, but logically it behaves as if the connected devices were sitting together on one LAN.

Where's the exact line between a MAN and a WAN?

There's no strict distance cutoff. In practice, a network that stays within one city or metro area and is run by a single carrier is usually called a MAN, while a network that spans countries or continents and links multiple operators' networks together is called a WAN.