What does "type of network" mean?
In What is a computer network? you saw that a network can be as small as two laptops or as large as the whole internet. To describe them clearly, networks are grouped by the area they cover. Each group also tends to have its own owners, technologies and speeds.
These are the five names you will meet most often, from smallest to largest:
💡 In simple terms: network types are like roads. Your driveway is a PAN, the streets of your neighbourhood are a LAN, the city's ring road is a MAN, and the motorways between cities and countries are WANs. Cars (packets) can travel on all of them in one trip.
Why the categories matter
The type of network tells you a lot before you look at any details:
- Who to call when it breaks. You fix your own LAN; your ISP fixes the WAN link.
- How fast and how expensive it is. LAN bandwidth is fast and cheap; WAN bandwidth is rented and costs far more per megabit.
- What equipment is used. Switches and access points inside a LAN; routers and provider links between sites.
- How much delay to expect. A reply across a LAN takes about a millisecond or less; a round trip across the world takes 100 ms or more.
How the types fit together
The types are not separate worlds: smaller networks sit inside larger ones and connect through them. A single video call can cross all five.
PAN: Personal Area Network
A PAN links the devices around one person: your phone, wireless earbuds, smartwatch, fitness tracker, or the keyboard and mouse for your laptop. It covers a few metres, usually about 10 m or less.
| Scale | Around one person, usually up to about 10 m |
|---|---|
| Owned by | You |
| Technologies | Bluetooth (wireless), USB (wired), NFC for tap-to-pay (a few centimetres) |
| Examples | Earbuds playing music from a phone; a watch syncing step counts; a phone tethered to a laptop by USB |
- 1. Phone to laptop. A photo goes over Bluetooth directly from the phone to the laptop. No router is involved.
- 2. Phone to printer. The same phone sends the photo to a small Bluetooth printer next to it.
A PAN is usually private and short-lived: devices pair, exchange data and disconnect. Most PAN devices reach the wider world through the phone or laptop, which is also connected to a LAN or a mobile network.
LAN: Local Area Network
A LAN connects devices in one place that you control: a home, a school, an office floor or a whole building. It is the network you know best: the PCs, printers, TVs and servers connected through switches and access points.
| Scale | A room to a building or campus (copper cables up to 100 m per run, longer with fibre) |
|---|---|
| Owned by | The household or organisation that uses it |
| Technologies | Ethernet over copper and fibre, plus Wi-Fi; typical speeds 1 Gbit/s to each desk, 10 Gbit/s or more between switches |
| Examples | Your home network; a school's computer room; an office floor |
Three things make a LAN a LAN: one owner, a limited area, and high speed at low cost. Devices on the same LAN (and the same subnet) can usually reach each other directly, without a router in between, using their MAC addresses.
LANs come in several forms, from a small office / home office (SOHO) network to an enterprise campus with access, distribution and core layers, or a data-centre LAN. The next lesson covers them in detail.
Learn more: Types of LANs
WLAN: Wireless LAN
A WLAN is a LAN that uses radio waves instead of cables. That radio system is Wi-Fi, defined by the IEEE 802.11 standards. Devices connect to a wireless access point (AP), which is plugged into the wired LAN. In most homes, the AP is built into the home router.
| Scale | Each AP covers roughly a room to a floor (often quoted as 30 to 50 m indoors; walls reduce this a lot) |
|---|---|
| Owned by | The household or organisation (or the café, hotel or airport for public hotspots) |
| Technologies | Wi-Fi 4, 5, 6/6E and 7 in the 2.4, 5 and 6 GHz bands |
| Examples | Home Wi-Fi; office Wi-Fi with many ceiling APs; a café hotspot |
- 1. Over the air. The laptop sends data to the access point by radio. This is the WLAN part.
- 2. Onto the wire. The AP passes the data onto the wired LAN, and the switch delivers it to the printer.
- 3. One LAN. Wireless and wired devices are on the same LAN and can communicate directly.
How Wi-Fi works, its frequency bands and how to secure it are covered in their own unit.
Learn more: Wi-Fi BasicsWi-Fi Frequency BandsWireless Security
MAN: Metropolitan Area Network
A MAN covers a town or city. It joins many LANs that are too far apart for normal LAN cables but still in the same area: a university's campuses across the city, a council's offices, schools and libraries, or hospitals sharing patient systems.
| Scale | A few kilometres up to roughly 50 km |
|---|---|
| Owned by | Usually a service provider; sometimes a city, university or utility |
| Technologies | Fibre-optic rings, Metro Ethernet services, fixed wireless links |
| Examples | A city fibre ring; a provider's network that carries home broadband across a city |
- 1. Sites share one network. The school reaches the town hall's systems over city fibre.
- 2. A ring gives a second way round. If the direct fibre is cut, traffic can travel around the ring the other way.
You rarely hear the term MAN in day-to-day work, because from your office it simply looks like a fast link from a provider. But it explains why your ISP has a large network of its own in your city.
WAN: Wide Area Network
A WAN connects networks that are far apart: across a country, between countries or around the world. Organisations almost never own the cables. Instead, they rent links from telecom providers and ISPs and connect to them with routers.
| Scale | Regions, countries, continents |
|---|---|
| Owned by | Carriers and ISPs; organisations rent capacity |
| Technologies | Leased lines, MPLS, internet broadband with a VPN on top, 4G/5G, satellite, undersea fibre |
| Examples | The internet; a retailer linking 500 shops to head office; a bank's private network |
The internet: the biggest WAN
The internet is a WAN made by tens of thousands of separate networks (ISPs, clouds, universities, companies) that agree to connect and exchange traffic using IP. Your home router is your network's doorway to it. Companies often build a private WAN over the internet using a VPN, which encrypts traffic between their sites.
- 1. Leave the LAN. The destination is on another network, so the PC sends the packet to its default gateway, the HQ router.
- 2. Cross the WAN. The router sends the packet over the rented link. The provider's network carries it hundreds of kilometres.
- 3. Enter the branch LAN. The branch router delivers the packet to the server. The IP addresses stayed the same the whole way.
Side-by-side comparison
| Type | Covers | Owned by | Main technologies | Typical delay | Example |
|---|---|---|---|---|---|
| PAN | ~10 m, one person | You | Bluetooth, USB, NFC | Low | Earbuds and phone |
| LAN | One building or site | The organisation | Ethernet, Wi-Fi | Under 1 ms | Office network |
| WLAN | AP radio range | The organisation | Wi-Fi (802.11) | A few ms | Home Wi-Fi |
| MAN | A city | Provider or city | Fibre rings, Metro Ethernet | A few ms | City fibre network |
| WAN | Countries, the world | Carriers and ISPs | Leased lines, MPLS, VPN, 5G, satellite | 10 to 300 ms | The internet |
Distances and delays are rough guides, not rules. A network's job and who owns the links usually decide its type better than a number of kilometres.
Other names you may meet
- CAN (Campus Area Network): several LANs across one campus of nearby buildings, owned by one organisation. Larger than a LAN, smaller than a MAN.
- SAN (Storage Area Network): a special high-speed network that connects servers to shared disk storage in a data centre.
- VPN (Virtual Private Network): not a size but a technique: a private, encrypted tunnel across a shared network such as the internet.
Learn more: VPN Basics
A real-world example: one video call, every type
Priya is at home wearing Bluetooth earbuds. She joins a video call with Sam, who is at his company's office in another country. Follow her voice through each network:
- 1. PAN. The microphone in her earbuds sends her voice to the laptop over Bluetooth.
- 2. WLAN and LAN. The laptop sends the voice packets over Wi-Fi to the home router, the edge of her LAN.
- 3. MAN. The router sends the packets into her ISP's network across the city.
- 4. WAN. The internet carries them across countries to Sam's office LAN and his PC.
Each part is run by someone different: Priya runs her PAN and LAN, her ISP runs the city network, many carriers run the internet path, and Sam's IT team runs his office LAN. If the call stutters, this is the list of places to look.
What happens when each type fails?
| Failure | What you notice | What still works |
|---|---|---|
| PAN: earbuds disconnect | Sound switches to the laptop speaker | Everything else; the call carries on |
| WLAN: Wi-Fi drops or is weak | Wi-Fi devices go offline or slow down | Wired devices on the same LAN |
| LAN: a switch fails | Devices on that switch lose everything | Devices on other switches |
| MAN / ISP link down | No internet for the whole home or office | Local printing, file shares, casting to the TV |
| WAN link between sites down | Branch can't reach head-office systems | Everything inside each site's LAN |
Seeing the types from your own computer
tracert (Windows) or traceroute (Linux, macOS) lists every router a packet passes through. You can watch it leave your LAN and enter the WAN:
C:\>tracert -d 203.0.113.10 Tracing route to 203.0.113.10 over a maximum of 30 hops 1 2 ms 1 ms 2 ms 192.168.1.1 2 9 ms 8 ms 10 ms 198.51.100.1 3 11 ms 10 ms 11 ms 198.51.100.62 4 38 ms 37 ms 39 ms 192.0.2.45 5 41 ms 40 ms 40 ms 203.0.113.10 Trace complete.
192.168.1.1) is your home router, the edge of your LAN, with a private address and a time of about 2 ms. Hops 2 and 3 are your ISP's network in your area. The jump to about 38 ms at hop 4 is the long WAN distance. The -d option skips name lookups, so the trace runs faster.Learn more: Traceroute
To check the WLAN part on Windows, show which Wi-Fi network you are connected to and how strong the signal is:
C:\>netsh wlan show interfaces There is 1 interface on the system: Name : Wi-Fi Description : Wireless Network Adapter State : connected SSID : HomeNet Radio type : 802.11ax Authentication : WPA2-Personal Channel : 36 Receive rate (Mbps) : 1201 Transmit rate (Mbps) : 1201 Signal : 86%
HomeNet), Radio type 802.11ax means Wi-Fi 6, and Signal is a strong 86%. If the signal is low, move closer to the access point before blaming the internet.Common mistakes
- Thinking a WLAN is a separate network from the LAN. Usually it is the wireless part of the same LAN.
- Saying WAN when you mean the internet. The internet is one WAN, but private company WANs exist too.
- Judging the type by distance alone. Two buildings 300 m apart joined by your own fibre are still part of your LAN (or campus network), while a rented link across the street is a WAN link.
- Thinking Bluetooth devices are on your LAN. Earbuds and watches only communicate with the phone or laptop they are paired with.
- Expecting WAN speed to match LAN speed. A 1 Gbit/s LAN behind a 100 Mbit/s internet link can only reach the internet at 100 Mbit/s.
- Networks are grouped by the area they cover: PAN < LAN/WLAN < MAN < WAN.
- A PAN is one person's devices, usually over Bluetooth.
- A LAN is one site you own and control; a WLAN is its wireless (Wi-Fi) part.
- A MAN covers a city; a WAN joins networks across countries over rented links.
- The internet is the biggest WAN: a network of networks.
- Ownership matters: you fix your LAN, the provider fixes the WAN.
Knowledge check
A smartwatch sends your heart rate to your phone in your pocket. What type of network is that?
A company joins its offices in London, Paris and Madrid using links rented from a carrier. What is that?
At home, your Wi-Fi laptop can print to a printer plugged into the router with a cable. Why does this work?
Your internet connection is down, but you can still cast a video from your phone to the TV on Wi-Fi. Which network has failed?
Where to go next
Next, take a closer look at the network you control in Types of LANs, then at the shapes networks are wired in, in Network topologies. To see what the devices in each network do, read Switches, Routers and Modems.