Computer networks are often classified by their geographical scale — how large an area they cover. A Personal Area Network (PAN) spans just a few metres around a single person, while a Metropolitan Area Network (MAN) covers an entire city or town. Understanding where each type fits helps you choose the right networking approach for a given situation.
What are the four main network types by scale?
Networks are usually organised into four categories, from smallest to largest:
| Network type | Full name | Typical range | Common technology |
|---|---|---|---|
| PAN | Personal Area Network | Up to ~10 metres | Bluetooth, USB, NFC |
| LAN | Local Area Network | Up to ~1 km (single building/campus) | Ethernet, Wi-Fi |
| MAN | Metropolitan Area Network | Up to ~50–100 km (city or region) | Fibre optic, WiMAX |
| WAN | Wide Area Network | Unlimited (countries, worldwide) | Leased lines, the internet |
What is a PAN (Personal Area Network)?
A Personal Area Network connects devices that are within a few metres of a single person — typically their personal electronic devices working together.
Typical PAN examples:
- A smartphone connected wirelessly to Bluetooth earphones
- A laptop paired with a Bluetooth mouse and keyboard
- A smartwatch synchronising health data with a phone
- A phone sharing its screen with a smart TV via Miracast
- Two phones tapping together to share a contact via NFC
Key technology — Bluetooth: Bluetooth operates at 2.4 GHz and has a typical range of 10 metres (Class 2 devices) up to 100 metres (Class 1 devices). It uses a master–slave model where one device (the master) manages connections with up to seven active devices simultaneously in a piconet. Multiple piconets can overlap in a scatternet.
Why PANs exist: Wired connections between personal devices are cumbersome. Bluetooth PANs allow earphones, keyboards, mice, and health monitors to communicate with a central device (usually a phone or laptop) cable-free, using very little power.
What is a MAN (Metropolitan Area Network)?
A Metropolitan Area Network covers a city, town, or large campus — larger than a LAN but smaller than a WAN. MANs are typically built and operated by internet service providers, local authorities, or large organisations.
Typical MAN examples:
- A city-wide public Wi-Fi network
- A university's network connecting buildings across a campus spread over several kilometres
- Cable TV networks serving an entire city
- A transport authority's network linking stations, depots, and control rooms across a city
Key technologies:
- Fibre optic cable: high-speed, high-capacity backbone cables laid under city streets
- WiMAX (Worldwide Interoperability for Microwave Access): a wireless standard designed for metropolitan-scale coverage, providing broadband to areas without fibre
- Dark fibre: unused fibre optic infrastructure that organisations lease to build private MANs
Why MANs exist: A LAN cannot span more than a building; a WAN (the internet) introduces public infrastructure, variable speed, and security risks. A MAN gives organisations reliable, high-speed private connectivity across a city without routing data through the public internet.
How do the four network types compare?
| Feature | PAN | LAN | MAN | WAN |
|---|---|---|---|---|
| Scale | Room (~10 m) | Building/campus (~1 km) | City (~50 km) | Country/world |
| Ownership | Personal devices | Organisation | ISP / local authority | Multiple ISPs / governments |
| Speed | Up to ~3 Mbps (Bluetooth 5) | Up to 10 Gbps (Ethernet) | Up to 1 Gbps (fibre MAN) | Varies: 1 Mbps – 100 Gbps |
| Setup cost | Minimal | Low–moderate | High | Very high |
| Security | Relatively secure (short range) | Controlled by one organisation | Managed by ISP | Public infrastructure |
Why do we classify networks by scale?
Scale determines technology choices, costs, and security:
- A PAN does not need routers or cables — Bluetooth handles the job.
- A LAN in a school uses managed switches, a single router, and Ethernet or Wi-Fi.
- A MAN requires infrastructure investment (fibre cables under roads) and is operated professionally.
- A WAN (the internet) involves thousands of organisations, international cables, and complex routing protocols.
The classification also helps network engineers communicate: "connect these two offices in the same building" is a LAN problem; "connect offices in Manchester and Leeds" is a WAN problem.
Frequently asked questions
What is the difference between a PAN and a LAN?
A PAN is a very small network — typically connecting devices belonging to one person within a few metres, using Bluetooth or USB. A LAN connects devices within a single building or small campus (up to about 1 km), typically using Ethernet cables or Wi-Fi, and is used to share resources like printers and internet access among many users.
Is Wi-Fi always a LAN technology?
In most home and school settings, yes — Wi-Fi creates a wireless LAN. However, WiMAX is a Wi-Fi-like technology designed for metropolitan-scale wireless coverage. The key difference is range: standard Wi-Fi (IEEE 802.11) covers tens of metres to a few hundred metres; WiMAX covers kilometres. Both use radio waves, but different frequencies and standards.
Can a MAN be privately owned?
Yes. Large organisations — universities, NHS trusts, transport authorities — build private MANs by leasing fibre optic cables from providers or using their own infrastructure. These private MANs give the organisation full control over speed, security, and traffic management, without the unpredictability of sending sensitive data over the public internet.
How does a MAN connect to the internet?
A MAN connects to the internet through one or more points of presence (PoPs) — locations where the MAN links to a wide-area network operated by a Tier-1 or Tier-2 internet service provider. These connections are typically high-speed fibre links. Multiple PoPs provide redundancy: if one link fails, traffic reroutes through another.
Professor Turing at aitutors.me can map out every network type with you — from Bluetooth PAN to the global internet — until the scale and the technology click into place.