beginner v1 • Updated 6 hours ago

Network Types (LAN, WAN, MAN, PAN)

Networks are classified by their geographic scope and administrative ownership into PAN, LAN, MAN, and WAN.

Remember This Key Rule

LAN = private high-speed local network; WAN = long-distance interconnected network spanning broad geographic regions.

In Simple Terms

Depending on physical distance and infrastructure ownership, networks range from tiny personal bubbles (PAN) and single-building networks (LAN) to city-wide networks (MAN) and worldwide interconnections (WAN).

Visual Diagram & Flow

PAN

Personal (<10m)

LAN

Local (Building)

MAN

Metro (City)

WAN

Wide (Global)

Why It Matters in Real Networks

Choosing the correct network architecture dictates the hardware required, bandwidth costs, latency expectations, and security boundaries.

How It Works (Technical Breakdown)

- **PAN (Personal Area Network)**: < 10 meters, e.g. Bluetooth mouse, wireless headphones. - **LAN (Local Area Network)**: High speed (1 Gbps - 100 Gbps), low latency, privately owned within a single room, office, or building. - **MAN (Metropolitan Area Network)**: Covers a town or campus across several kilometers, often operated by municipalities or telecom consortiums. - **WAN (Wide Area Network)**: Spans cities, countries, or continents. Operates across public or leased telecommunication circuits with higher latency.

Real-World Analogy

A LAN is like your private house intercom system; a MAN is like city public transit; a WAN is like international airlines connecting major continents.

Concrete Example

A corporate headquarters in Chicago has 400 computers on a high-speed LAN. It connects to branch offices in London and Tokyo via an encrypted SD-WAN tunnel across the Internet.

Common Engineering Mistakes & Pitfalls

Assuming all LANs must be wireless (WLAN) or thinking a multi-building university campus is a single small LAN rather than a CAN/MAN.

Prerequisites

What is a Computer Network Recommended

Next & Related Concepts

OSI 7-Layer Model Unlocks Next →

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Version	Change Summary	Author	Timestamp
v1 (Current)	Active production content	system	Sun, Aug 23, 2026 11:09 AM