Metropolitan area network


Metropolitan area network
Computer network types by geographical scope
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A metropolitan area network (MAN) is a computer network that usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high-capacity backbone technology, such as fiber-optical links, and provides up-link services to wide area networks (or WAN) and the Internet.

The IEEE 802-2002 standard describes a MAN as being[1]:

A MAN is optimized for a larger geographical area than a LAN, ranging from several blocks of buildings to entire cities. MANs can also depend on communications channels of moderate-to-high data rates. A MAN might be owned and operated by a single organization, but it usually will be used by many individuals and organizations. MANs might also be owned and operated as public utilities. They will often provide means for internetworking of local networks.

Authors Kenneth C. Laudon and Jane P. Laudon(2001) of Management Information Systems: Managing the Digital Firm 10th ed. define a metropolitan area network as:

A Metropolitan Area Network (MAN) is a large computer network that spans a metropolitan area or campus. Its geographic scope falls between a WAN and LAN. MANs provide Internet connectivity for LANs in a metropolitan region, and connect them to wider area networks like the Internet.

It can also be used in cable television.

Implementation

Some technologies used for this purpose are Asynchronous Transfer Mode (ATM), FDDI, and SMDS. These technologies are in the process of being displaced by Ethernet-based connections (e.g., Metro Ethernet) in most areas. MAN links between local area networks have been built without cables using either microwave, radio, or infra-red laser links. Most companies rent or lease circuits from common carriers because laying long stretches of cable can be expensive.

DQDB, Distributed-queue dual-bus, is the metropolitan area network standard for data communication. It is specified in the IEEE 802.6 standard. Using DQDB, networks can be up to 20 miles (30 km) long and operate at speeds of 34 to 155 Mbit/s.

Several notable networks started as MANs, such as the Internet peering points MAE-West, MAE-East, and the Sohonet media network.[citation needed]

See also

References

  1. ^ IEEE Std 802-2002, IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture, page 1, section 1.2: "Key Concepts", "basic technologies" http://standards.ieee.org/getieee802/download/802-2001.pdf

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Look at other dictionaries:

  • metropolitan area network — noun A computer network operating over a city or community (abbrev MAN) • • • Main Entry: ↑metropolis …   Useful english dictionary

  • Metropolitan area network — (MAN) (от англ. «сеть крупного города») представляет собой сеть по размерам меньшую чем WAN, но большую, чем LAN. MAN применяется для объединения в одну сеть группы сетей, расположенных в разных зданиях. В диаметре такая сеть может составлять от… …   Википедия

  • Metropolitan Area Network — Metropolitan Area Network,   MAN …   Universal-Lexikon

  • Metropolitan Area Network — Ein Metropolitan Area Network (MAN) ist ein breitbandiges Telekommunikationsnetz. Üblicherweise verbindet ein MAN zahlreiche Local Area Networks und verwendet dazu eine Backbone Technologie, die meist in Glasfasertechnik realisiert ist. Ein MAN… …   Deutsch Wikipedia

  • Metropolitan Area Network — Réseau métropolitain Pour les articles homonymes, voir Man. Un réseau métropolitain (en anglais Metropolitan Area Network, MAN) désigne un réseau composé d ordinateurs habituellement utilisé dans les campus ou dans les villes. Le réseau utilise… …   Wikipédia en Français

  • Metropolitan area network — Réseau métropolitain Pour les articles homonymes, voir Man. Un réseau métropolitain (en anglais Metropolitan Area Network, MAN) désigne un réseau composé d ordinateurs habituellement utilisé dans les campus ou dans les villes. Le réseau utilise… …   Wikipédia en Français

  • metropolitan-area network —    Abbreviated MAN. A public, high speed network, capable of voice and data transmission over a distance of up to 80 kilometers (50 miles). A MAN is smaller than a wide area network (WAN) but larger than a local area network (LAN) …   Dictionary of networking

  • metropolitan area network —    (MAN)    A communications network that spans geographical areas whose size is between that of a local area network (LAN) and a wide area or long distance network (WAN) …   IT glossary of terms, acronyms and abbreviations

  • metropolitan area network — noun a network that covers a large geographical area such as a city …   Wiktionary

  • Metropolitan Area Network — …   Википедия


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