A Wide Area Network ( WAN) is a computer network covering multiple distance areas, which may spread across the entire world. WANs often connect multiple smaller networks, such as local area networks (LANs) or metro area networks (MANs). The world's most popular WAN is the Internet. Some segments of the Internet are also WANs in themselves. The key difference between WAN and LAN technologies is scalability C WAN must be able to grow as needed to cover multiple cities, even countries and continents.
A set of switches and routers are interconnected to form a Wide Area Network. The switches can be connected in different topologies such as full mesh and half mesh. A wide area network may be privately owned or rented from a service provider, but the term usually connotes the inclusion of public (shared user) networks.
Both packet switching and circuit switching technologies are used in the WAN. Packet switching allows users to share common carrier resources so that the carrier can make more efficient use of its infrastructure. In a packet switching setup, networks have connections into the carrier's network, and many customers share the carrier's network. The carrier can then create virtual circuits between customers' sites by which packets of data are delivered from one to the other through the network.
Circuit Switching allows data connections to be established when needed and then terminated when communication is complete. This works like a normal telephone line works for voice communication. Integrated Services Digital Network (ISDN) is a good example of circuit switching. When a router has data for a remote site, the switched circuit is initiated with the circuit number of the remote network.
Edraw Network Diagram is ideal for network engineers and network designers who need to draw wan diagrams. It had defined some common used WAN symbols in drawing WAN diagrams. Just drag and drop pre-drawn shapes representing computers and network devices. Double click and set equipment data.
Examples of Wide Area Network Technologies Created by Edraw!
|Wide Area Network||Cisco WAN Network||WAN Topology|
Virtual private network (VPN) is a tecnology widely used in a public switched network (PSTN) to provide private and secured WAN for an organization. VPN uses encryption and other techniques to make it appear that the organisation has a dedicated network, while making use of the shared infrastructure of the WAN.
WAN technologies generally function at the lower three layers of the OSI reference model: the physical layer, the data link layer, and the network layer. Key technologies often found in WANs include SONET, Frame Relay, X.25, ATM and PPP.
IP can also be considered as a WAN technology in the packet switching environment.
Some network mapping symbols for network engineer. Provide a Common Graphics Technology for Network Mapping.
You can find more symbols for WAN diagrams at here.