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The textbook definition of a WAN is a computer network spanning regions, countries, or even the world. [ 3 ] [ 4 ] However, in terms of the application of communication protocols and concepts, it may be best to view WANs as computer networking technologies used to transmit data over long distances, and between different networks.
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. The term is also used to describe the interconnection of several LANs in a metropolitan area through the use of point-to-point connections between them. [1] [2]
In some cases the term higher speed rail would sound incorrect to define a train travelling below a high speed since higher is greater than high. Therefore, the word higher speed rail would sound correct to refer to a train at a speed between 300 and 500 km/h (i.e. greater than the high speed of 200–300 km/h). [according to whom?]
In addition, when the scope of a diagram crosses the common LAN/MAN/WAN boundaries, representative hypothetical devices may be depicted instead of showing all actually existing nodes. For example, if a network appliance is intended to be connected through the Internet to many end-user mobile devices, only a single such device may be depicted ...
In 2022, Greece's first high-speed train began operations between Athens and Thessaloniki. The 512 km (318 miles) route is covered in 3 to 4 hours with trains reaching speeds of up to 250 km/h (160 miles/h). [183] The 180 km (112 mile) line from Athens to Patras is also being upgraded to high speed with an expected completion by 2026.
Optical networking is a means of communication that uses signals encoded in light to transmit information in various types of telecommunications networks.These include limited range local-area networks (LAN) or wide area networks (WANs), which cross metropolitan and regional areas as well as long-distance national, international and transoceanic networks.
Authorities in the United States maintain various definitions of high-speed rail. The United States Department of Transportation, an entity in the executive branch, defines it as rail service with top speeds ranging from 110 to 150 miles per hour (180 to 240 km/h) or higher, [10] while the United States Code, which is the official codification of Federal statutes, defines it as rail service ...
A standardized variant of 10 Gigabit Ethernet, called WAN PHY, is designed to inter-operate with OC-192 transport equipment while the common version of 10 Gigabit Ethernet is called LAN PHY (which is not compatible with OC-192 transport equipment in its native form). The naming is somewhat misleading, because both variants can be used on a wide ...