Wide area network

WANWANswide area networkswide-area networkwide-area networksnetworkwide areawide-areawidecomputer networks
A wide area network (WAN) is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking.wikipedia
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Local area network

LANlocal networklocal
Similar types of networks are personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area, respectively.
By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits.

Computer network

networkcomputer networkingnetworking
A wide area network (WAN) is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking.
The defining characteristics of a LAN, in contrast to a wide area network (WAN), include higher data transfer rates, limited geographic range, and lack of reliance on leased lines to provide connectivity.

Metropolitan area network

MANMetropolitan Area Networksmetropolitan
Similar types of networks are personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area, respectively.
The term MAN is applied to the interconnection of local area networks (LANs) in a city into a single larger network which may then also offer efficient connection to a wide area network.

Ethernet

Ethernet portEthernet cableEthernet network
This distinction stems from the fact that common LAN technologies operating at lower layers of the OSI model (such as the forms of Ethernet or Wi-Fi) are often designed for physically proximal networks, and thus cannot transmit data over tens, hundreds, or even thousands of miles or kilometres.
Ethernet is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN).

Telecommunications network

networkcommunication networkcommunications network
A wide area network (WAN) is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking.
networks can range from a local area network (LAN) to a wide area network (WAN).

Wi-Fi

WiFiwireless internetwireless
This distinction stems from the fact that common LAN technologies operating at lower layers of the OSI model (such as the forms of Ethernet or Wi-Fi) are often designed for physically proximal networks, and thus cannot transmit data over tens, hundreds, or even thousands of miles or kilometres.
This includes wireless local area network (WLAN) connections, device to device connectivity (such as Wi-Fi Peer to Peer aka Wi-Fi Direct), Personal area network (PAN), local area network (LAN) and even some limited wide area network (WAN) connections.

Packet switching

packet-switched networkpacket switchedpacket-switched
Instead of using leased lines, WANs can also be built using less costly circuit switching or packet switching methods.
In the late 1950s, the US Air Force established a wide area network for the Semi-Automatic Ground Environment (SAGE) radar defense system.

Frame Relay

Frame-RelayframesLAPF
Protocols including Packet over SONET/SDH, Multiprotocol Label Switching (MPLS), Asynchronous Transfer Mode (ATM) and Frame Relay are often used by service providers to deliver the links that are used in WANs.
Frame Relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology.

X.25

X.25 protocol suiteX25CCITT X.25 recommendation
X.25 was an important early WAN protocol, and is often considered to be the "grandfather" of Frame Relay as many of the underlying protocols and functions of X.25 are still in use today (with upgrades) by Frame Relay.
X.25 is an ITU-T standard protocol suite for packet-switched wide area network (WAN) communication.

Router (computing)

routerroutersnetwork router
At each end of the leased line, a router connects the LAN on one side with a second router within the LAN on the other.
Distribution routers are often responsible for enforcing quality of service across a wide area network (WAN), so they may have considerable memory installed, multiple WAN interface connections, and substantial onboard data processing routines.

WAN optimization

Bandwidth Optimization softwarepriorityWAN acceleration
Performance improvements are sometimes delivered via wide area file services or WAN optimization.
WAN optimization is a collection of techniques for increasing data transfer efficiencies across wide-area networks (WANs).

Wide area file services

WAFS
Performance improvements are sometimes delivered via wide area file services or WAN optimization.
Wide area file services (WAFS) products allow remote office users to access and share files globally at LAN speeds over the WAN.

Virtual private network

VPNvirtual private networksVPNs
Since two private networks, e.g., two branch offices, cannot directly interoperate via the public Internet, the two networks must be bridged across the Internet via a virtual private network (VPN) or an IP tunnel, which encapsulates packets, including their headers containing the private addresses, in a protocol layer during transmission across the public network.
A VPN available from the public Internet can provide some of the benefits of a wide area network (WAN).

Packet over SONET/SDH

Packet over SONETPoS40G POS
Protocols including Packet over SONET/SDH, Multiprotocol Label Switching (MPLS), Asynchronous Transfer Mode (ATM) and Frame Relay are often used by service providers to deliver the links that are used in WANs.
The most important application of POS is to support sending of IP packets across Wide Area Networks.

Internet area network

An Internet area network (IAN) is a concept for a communications network that connects voice and data endpoints within a cloud environment over IP, replacing an existing local area network (LAN), wide area network (WAN) or the public switched telephone network (PSTN).

Software-defined networking

Software Defined NetworkingSDNsoftware-defined network
SD-WAN applies similar technology to a wide area network (WAN).

LPWAN

Low Power Wide Area NetworkLoRaLow Power Wide Access Network
A low-power wide-area network (LPWAN) or low-power wide-area (LPWA) network or low-power network (LPN) is a type of wireless telecommunication wide area network designed to allow long-range communications at a low bit rate among things (connected objects), such as sensors operated on a battery.

Wireless WAN

WWANWireless Wide Area Networkwireless
The larger size of a wide area network compared to a local area network requires differences in technology.

Leased line

leased linesInternational Private Leased Circuitleased
Wide area networks are often established with leased telecommunication circuits.

Internet

onlinethe Internetweb
The Internet may be considered a WAN.

Personal area network

wireless personal area networkPANWPAN
Similar types of networks are personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area, respectively.

Campus network

campus area networkcorporate networkuniversity network
Similar types of networks are personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area, respectively.

OSI model

OSIOpen Systems InterconnectionOSI reference model
This distinction stems from the fact that common LAN technologies operating at lower layers of the OSI model (such as the forms of Ethernet or Wi-Fi) are often designed for physically proximal networks, and thus cannot transmit data over tens, hundreds, or even thousands of miles or kilometres.

Bandwidth (computing)

bandwidthnetwork bandwidthInternet bandwidth
This could be to facilitate higher bandwidth applications or provide better functionality for users in the CAN.