Types of Computer Networks Explained: PAN, LAN, WLAN, CAN, MAN, WAN and SAN
Learn the 8 major types of computer networks: PAN, LAN, WLAN, CAN, SAN, MAN, and WAN. Discover how each network works, their real-life applications, and how they differ based on speed, size, and usage.
Quick answer: Computer networks are classified mainly by size and purpose: PAN (personal devices), LAN (a building or office), WLAN (a wireless LAN), CAN (a campus), MAN (a city), WAN (cities, countries or the world, including the Internet) and SAN (storage servers). A VPN is a secure tunnel over another network, not a size class.
Key takeaways
- Networks are grouped by geographic scale: PAN, LAN, CAN, MAN, WAN.
- WLAN is a LAN that uses wireless, typically Wi-Fi.
- The Internet is a worldwide network of networks, which makes it a WAN.
- SAN usually means a storage area network, a dedicated network between servers and storage.
Comparison at a glance
| Type | Full name | Typical scope | Example |
|---|---|---|---|
| PAN | Personal Area Network | Around one person, a few metres | Phone linked to earbuds by Bluetooth |
| LAN | Local Area Network | One room, home, office or building | Office computers connected by switches |
| WLAN | Wireless LAN | Same as LAN, but wireless | Wi-Fi in a home or café |
| CAN | Campus Area Network | Several buildings of one organisation | College or company campus |
| MAN | Metropolitan Area Network | A city or large area | City-wide fibre linking branches |
| WAN | Wide Area Network | Cities, countries, continents | Company links between Pune and other offices; the Internet |
| SAN | Storage Area Network | A data centre | Servers sharing disk arrays over a dedicated network |
| VPN | Virtual Private Network | Runs over another network | Secure remote access to office systems |
The sizes are descriptive. There are no fixed numeric limits that define each type.
Each type in a few lines
PAN
A network around one person's devices: a phone, smartwatch, earbuds, laptop. Technologies include Bluetooth and USB. Range is short.
LAN
Devices in a limited area share resources such as printers and servers. A LAN usually uses Ethernet cables and switches, with a router to reach other networks. It is typically owned and managed by one organisation or household.
WLAN
A LAN that uses radio, normally Wi-Fi. Devices connect through an access point. WLAN is the same idea as a LAN with a different medium, and Wi-Fi is the common technology name. Because the signal travels through the air, encryption such as WPA2 or WPA3 matters.
CAN
A group of LANs joined across nearby buildings, such as a university. It uses high-speed links under one administration.
MAN
A network that covers a city or town, often built or leased by a provider to link offices, campuses or public services.
WAN
A network that spans large distances and usually uses links leased from carriers. Companies use WANs to connect offices; technologies include MPLS, leased lines and SD-WAN. The Internet is the largest WAN, a network of networks.
SAN
Usually a Storage Area Network, a high-speed network that connects servers to shared storage in a data centre. Be careful: some sources use SAN for "system area network", a fast network linking clustered computers. Check which meaning is intended.
VPN
Not a size class. A VPN creates an encrypted tunnel across another network, usually the Internet, so remote users and branches can reach private resources securely.
How do they fit together?
A typical company has a LAN and WLAN in each office, a campus network if it has several buildings in one place, a WAN linking offices and data centres, a SAN inside the data centre and VPNs for remote staff. All of these connect through routers and are described in the same layered models (OSI and TCP/IP).
What are the common confusions?
- LAN versus WLAN: WLAN is a kind of LAN. The difference is the medium.
- Is the Internet a LAN or WAN? It is a WAN, or more exactly a global network of many networks.
- Is a hotspot a PAN? Sharing your phone's connection with your laptop is often described as a PAN, though it uses Wi-Fi.
- Network type versus topology: type is scale (LAN, WAN). Topology is shape (star, bus, ring, mesh).
Next steps
For how networks work in practice, read how a computer network works and a beginner's guide to computer networking. To go further, see the Computer Network course or the CCNA 200-301 course.
Related reading
Frequently Asked Questions
What's Your Reaction?
Like
0
Dislike
0
Love
0
Funny
0
Wow
0
Sad
0
Angry
0
Vaishnavi is a skilled tech professional at the Ethical Hacking Training Institute in Pune, responsible for managing and optimizing the technical infrastructure that supports advanced cybersecurity education. With deep expertise in network security, backend operations, and system performance, she ensures that practical labs, online modules, and assessments run smoothly and securely. Her behind-the-scenes contributions play a vital role in delivering a seamless and secure learning experience for aspiring ethical hackers.
