Communication networks are critical in facilitating data exchange between devices or entities. The choice of a specific type of communication network often depends on factors such as geographic spread, purpose, and scale.
Here are some principal types of communication networks:
Personal Area Network (PAN):
- ScopeVery short range (usually up to a few meters).
- UsageInterconnecting personal devices, such as computers, phones, printers, and tablets.
- ExamplesBluetooth connections, USB connections.
Local Area Network (LAN):
- ScopeLimited to a small geographic area, like a single building or a campus.
- UsageConnecting devices within homes, offices, or schools.
- ExamplesEthernet, Wi-Fi in a home or office setting.
Metropolitan Area Network (MAN):
- ScopeSpans a city or a large campus.
- UsageUsed by ISPs to offer Internet connectivity for the residents of a city or connecting various LANs within a city.
- ExamplesCable TV networks, WiMAX.
Wide Area Network (WAN):
- ScopeExtends across countries or even continents.
- UsageInterconnecting LANs and other types of networks across broad geographic areas.
- ExamplesThe Internet, VPNs.
Wireless Local Area Network (WLAN):
- ScopeLimited geographic area, similar to LAN but wireless.
- UsageOffering wireless connectivity within a specific range.
- ExamplesWi-Fi networks.
Wireless Wide Area Network (WWAN):
- ScopeLarge geographic areas, can be countrywide or global.
- UsageMobile communication, satellite communication.
- ExamplesCellular networks (4G, 5G), satellite networks.
Campus Area Network (CAN):
- Scope: Spanning multiple buildings or a whole campus.
- Usage: Used by academic institutions and large corporations to connect various LANs within a specific geographic area.
Global Area Network (GAN):
- ScopeGlobal coverage.
- UsageConnecting networks around the world, often through satellite systems.
- ExamplesGlobal satellite systems, global roaming services for mobile phones.
Storage Area Network (SAN):
- Scope: Can vary, but often localized within a data center.
- Usage: Connecting servers to data storage devices, allowing multiple servers to access shared storage.
Enterprise Private Network (EPN):
- Scope: Specific to a single organization, covering multiple locations.
- Usage: Securely interconnecting various parts of an organization’s locations while keeping the communication private.
Virtual Private Network (VPN):
- Scope: Can be local, national, or global.
- Usage: Extending a private network across a public one, like the Internet, while maintaining security and privacy.
Peer-to-Peer Network (P2P):
- ScopeCan be local or global.
- UsageDirect sharing of files, resources, or data between peers without the need for centralized servers.
- ExamplesBitTorrent, decentralized blockchain networks.
Each type of network caters to specific needs and scenarios. The advancement in networking technologies and protocols continues to expand the possibilities and efficiencies of these networks.
Key terms in plain language
Open a term for a concise explanation of language used on this page.
VPN
A virtual private network creates an encrypted connection across another network, commonly allowing remote users or offices to access private resources securely.
Cybersecurity
The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.
Zero Trust
A security model that does not automatically trust a user or device because of its location. Access is continuously verified and limited to what is necessary.
SASE
Secure Access Service Edge combines networking and security capabilities in a cloud-delivered architecture so users and locations can receive consistent policy wherever they connect.
Identity and Access Management (IAM)
The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.
Multi-Factor Authentication (MFA)
A login control requiring more than one form of verification, such as a password plus an authenticator app, security key, or biometric factor.