What types of computer networks are there?
Types of computer networks
Computer networks are classified by several criteria: by geographic scope, by connection method, by accessibility, by topology, by the role of devices.
Interviews almost always ask about LAN, WAN, MAN, PAN, WLAN. But it is worth mentioning the full classification - it shows depth of knowledge.
1. Classification by scale (the most important)
1.1. PAN (Personal Area Network) - personal network
Range: 1-3 meters. Examples:
- Bluetooth headphones
- a smartwatch
- smartphone ↔ headset
- IoT devices around the user
Used for: connecting personal devices.
1.2. LAN (Local Area Network) - local network
Range: a room, apartment, office, school. Characteristics:
- high speed (1-10 Gbit/s and above)
- low latency
- equipment: switches, Wi-Fi access points
Examples: an office network, a home network.
1.3. WLAN (Wireless LAN) - wireless local network
This is a subtype of LAN, but wireless.
Example:
- a Wi-Fi network at the office or at home
1.4. MAN (Metropolitan Area Network) - metropolitan network
Range: within a city or district. Examples:
- a telecom operator's network in a city
- a connection between branches over a city channel
1.5. WAN (Wide Area Network) - wide-area network
Range: regions, countries, continents. Used for:
- backbone communication channels
- VPNs between remote offices
- provider channels
The main example of a WAN is the internet.
2. Classification by access
2.1. Private networks
Used by organizations or people. IP addresses: private ranges (10.0.0.0/8, 192.168.0.0/16, etc.)
2.2. Public networks
Publicly accessible networks, for example:
- the internet
- Wi-Fi in a cafe (partially public access)
3. Classification by connection type
3.1. Wired networks
- Ethernet
- fiber optic
- copper cable
3.2. Wireless networks
- Wi-Fi
- Bluetooth
- LTE/5G
- radio networks
4. Classification by device role
4.1. Client-server networks
There are servers and clients, with strict roles. Examples:
- a corporate network with Active Directory
- a web server → users
4.2. P2P (Peer-to-Peer)
All participants are equal. Examples:
- torrent networks
- local file sharing without a server
5. Classification by topology (how devices are connected)
This is also often asked in interviews.
- Bus
- Star - the most common in Ethernet
- Ring
- Mesh
- Tree
Ready answer for the interview (short and clear)
Network types are distinguished by scale:
- PAN - personal (Bluetooth)
- LAN - a local network within an office/home
- WLAN - wireless LAN (Wi-Fi)
- MAN - a metropolitan network
- WAN - a wide-area network, including the internet
Networks are also classified by accessibility (private/public), by connection method (wired/wireless), by device role (client-server, P2P), and by topology (star, bus, ring, mesh).
Short Answer
Interview readyA concise answer to help you respond confidently on this topic during an interview.