Computer networks can be classified based on their size and range. Here are the main types:

• Personal Area Network (PAN): Wireless or wired connectivity for personal devices.
• Local Area Network (LAN): Covers a small geographic area like a home, school, or office.
• Metropolitan Area Network (MAN): Spans a city-wide area.
• Wide Area Network (WAN): Connects devices over large geographic areas, such as countries or continents.
• Campus Network: Inter-building network within a limited geographic area like a university campus.
• Storage Area Network (SAN): Specialized network providing access to consolidated block-level data storage.
Content Delivery Network (CDN): Distributed server network for delivering content more efficiently to users.
Extranet: Restricted access network that extends and provides services beyond the company's regular users.
Intranet: Private internal network within an organization.
Virtual Private Network (VPN): Provides secure remote access over the internet by creating a private network from a public internet connection.