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Local Area Network (LAN) explained!
Local Area Network (LAN) explained!
Published: 2015/04/14
Channel: MotherLode458
01 - Networking Fundamentals  - Understanding Local Area Networking
01 - Networking Fundamentals - Understanding Local Area Networking
Published: 2014/05/27
Channel: RG Edu
What is a LAN (Local Area Network)
What is a LAN (Local Area Network)
Published: 2013/02/19
Channel: bmanishap
What is LAN? Tech Terms with Esther
What is LAN? Tech Terms with Esther
Published: 2014/03/25
Channel: NCIXEsther
How to Connect two Computer in a Local Area Network ( LAN ) using Cat5 cable:
How to Connect two Computer in a Local Area Network ( LAN ) using Cat5 cable:
Published: 2014/03/27
Channel: STechVision
What is a LAN (Local Area Network)
What is a LAN (Local Area Network)
Published: 2010/09/10
Channel: butterscotchcom
Building Your Own Network for a Computer Lab
Building Your Own Network for a Computer Lab
Published: 2013/02/15
Channel: Eli the Computer Guy
How to Set Up a LAN Network | Internet Setup
How to Set Up a LAN Network | Internet Setup
Published: 2012/03/18
Channel: Howcast
My Local Area Network Setup
My Local Area Network Setup
Published: 2012/02/20
Channel: RandyChristianLee
Example of a LAN: Local Area Network for networking students
Example of a LAN: Local Area Network for networking students
Published: 2009/08/19
Channel: JC Buschow
Networking Tutorials for Beginners
Networking Tutorials for Beginners
Published: 2015/10/28
Channel: devGeeK
Question: What is the Difference Between a LAN, WAN and PAN?
Question: What is the Difference Between a LAN, WAN and PAN?
Published: 2015/02/11
Channel: Failed Normal Redux
Local Area Network connection doesn
Local Area Network connection doesn't have a valid IP configuration-Easily Fixed
Published: 2014/03/01
Channel: DEVICE MANAGER
Adding LAN Ports To Your Router And Increasing Your LAN (Local Area Network) Speed
Adding LAN Ports To Your Router And Increasing Your LAN (Local Area Network) Speed
Published: 2013/12/04
Channel: Richard Lloyd
What is LAN MAN CAN WAN - Networking part 4
What is LAN MAN CAN WAN - Networking part 4
Published: 2012/01/05
Channel: JagvinderThind
Local Area Network (What is LAN) tutorial: Networking tutorial for beginners 2
Local Area Network (What is LAN) tutorial: Networking tutorial for beginners 2
Published: 2015/06/06
Channel: Learn English, Hindi, Urdu, Dutch speaking
What is Local Area Network (Lan) (In Hindi)
What is Local Area Network (Lan) (In Hindi)
Published: 2016/08/14
Channel: Technical Sagar
HOW CREATE A PROFESSIONAL LAN LOCAL AREA NETWORK  😎
HOW CREATE A PROFESSIONAL LAN LOCAL AREA NETWORK 😎
Published: 2016/02/10
Channel: veltronix.com
Designing a Local Area Network
Designing a Local Area Network
Published: 2014/10/15
Channel: Pouria Ghatrenabi
How To Setup a LAN Connection in Windows 7
How To Setup a LAN Connection in Windows 7
Published: 2011/10/17
Channel: PcOrigin
LAN Configuration Setup of the Internet Cafe Network
LAN Configuration Setup of the Internet Cafe Network
Published: 2013/06/24
Channel: Ketut Agus Suardika
how to fix Local Area Connection is missing (RED X) for windows 7/8/10 2017
how to fix Local Area Connection is missing (RED X) for windows 7/8/10 2017
Published: 2015/02/06
Channel: It'sTeamPhantom
How to Set Up a Wireless LAN Network
How to Set Up a Wireless LAN Network
Published: 2011/10/23
Channel: ZooCrew
How to hack local area network
How to hack local area network
Published: 2012/01/07
Channel: Technophileshub
Local area network | LAN
Local area network | LAN
Published: 2017/05/20
Channel: Education 4u
How to Configure a "LAN \ Internet" Network
How to Configure a "LAN \ Internet" Network
Published: 2010/09/13
Channel: FrescoF
LAN LOCAL AREA NETWORKS
LAN LOCAL AREA NETWORKS
Published: 2006/12/07
Channel: megaboy84
Difference between LAN & WAN in Hindi
Difference between LAN & WAN in Hindi
Published: 2017/06/03
Channel: Digital Spot
CSIS 202: OSI Layer 2 - Local Area Networks
CSIS 202: OSI Layer 2 - Local Area Networks
Published: 2013/11/26
Channel: Bill Bennett
How local area network works
How local area network works
Published: 2011/07/04
Channel: Arif Abdul Hai
Password Protected Folder Sharing in LAN (Local area Network) Without any Software
Password Protected Folder Sharing in LAN (Local area Network) Without any Software
Published: 2017/03/20
Channel: Dhakad Tech
The Computer Chronicles - Local Area Networks (1984)
The Computer Chronicles - Local Area Networks (1984)
Published: 2012/11/08
Channel: The Computer Chronicles
Sharing Internet Connection on a Local Area Network using a Router
Sharing Internet Connection on a Local Area Network using a Router
Published: 2011/04/08
Channel: Jagat Review
How to Disable Internet connection without disabling the LAN network
How to Disable Internet connection without disabling the LAN network
Published: 2014/10/21
Channel: muhammadlilg
How to Find your IP Address on a Local Area Network (LAN)
How to Find your IP Address on a Local Area Network (LAN)
Published: 2012/08/27
Channel: tvtradedave
How To Assign A Static IP Address To A Local Area Network Connection
How To Assign A Static IP Address To A Local Area Network Connection
Published: 2014/06/17
Channel: Smith Technical Resources
How to Hack Internet on Local Area Network
How to Hack Internet on Local Area Network
Published: 2017/03/23
Channel: The Tech Bytes
Lecture   Local Area Networks
Lecture Local Area Networks
Published: 2012/09/25
Channel: Nicholas Andre
LAN not working:Invalid IP Configuration
LAN not working:Invalid IP Configuration
Published: 2013/10/11
Channel: Tusharanand Srivastava
How to transfer files in a LAN Network
How to transfer files in a LAN Network
Published: 2014/04/24
Channel: Dans Tech
How to make Local Area Connection
How to make Local Area Connection
Published: 2015/08/03
Channel: Nandira Arya
what is the difference between lan and wan in hindi
what is the difference between lan and wan in hindi
Published: 2014/05/14
Channel: Vikas Madan
21 - Virtual Local Area Network (VLAN)
21 - Virtual Local Area Network (VLAN)
Published: 2015/12/24
Channel: Jason Dion
Fundamental Concepts of Computer Networks: Part 1 - PAN, LAN, MAN & WAN
Fundamental Concepts of Computer Networks: Part 1 - PAN, LAN, MAN & WAN
Published: 2014/04/10
Channel: Scholartica Channel
LAN (LOCAL AREA NETWORK) /CAMPUS NETWORK IN UTHM
LAN (LOCAL AREA NETWORK) /CAMPUS NETWORK IN UTHM
Published: 2016/05/09
Channel: Hajar Mohd Rosli
Wireless Local Area Network Feature Introduction
Wireless Local Area Network Feature Introduction
Published: 2014/05/03
Channel: Huawei Enterprise Network
Sharing Internet Connection on a Local Area Network using a Wireless Router
Sharing Internet Connection on a Local Area Network using a Wireless Router
Published: 2011/04/15
Channel: Jagat Review
How are IP Packets Routed on a Local Area Network?
How are IP Packets Routed on a Local Area Network?
Published: 2012/04/14
Channel: itgeared
LAN (Local Area Network)
LAN (Local Area Network)
Published: 2014/01/22
Channel: Modulo 0 Tutoriales
Network Scope - Local Area Network (LAN)
Network Scope - Local Area Network (LAN)
Published: 2013/03/09
Channel: Lecture Snippets
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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A conceptual diagram of a local area network.

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.[1] By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits.

Ethernet and Wi-Fi are the two most common technologies in use for local area networks. Historical technologies include ARCNET, Token ring, and AppleTalk.

History[edit]

The increasing demand and use of computers in universities and research labs in the late 1960s generated the need to provide high-speed interconnections between computer systems. A 1970 report from the Lawrence Radiation Laboratory detailing the growth of their "Octopus" network gave a good indication of the situation.[2][3]

A number of experimental and early commercial LAN technologies were developed in the 1970s. Cambridge Ring was developed at Cambridge University starting in 1974.[4] Ethernet was developed at Xerox PARC in 1973–1975,[5] and filed as U.S. Patent 4,063,220. In 1976, after the system was deployed at PARC, Robert Metcalfe and David Boggs published a seminal paper, "Ethernet: Distributed Packet-Switching for Local Computer Networks".[6] ARCNET was developed by Datapoint Corporation in 1976 and announced in 1977.[7] It had the first commercial installation in December 1977 at Chase Manhattan Bank in New York.[8]

The development and proliferation of personal computers using the CP/M operating system in the late 1970s, and later DOS-based systems starting in 1981, meant that many sites grew to dozens or even hundreds of computers. The initial driving force for networking was generally to share storage and printers, which were both expensive at the time. There was much enthusiasm for the concept and for several years, from about 1983 onward, computer industry pundits would regularly declare the coming year to be, “The year of the LAN”.[9][10][11]

In practice, the concept was marred by proliferation of incompatible physical layer and network protocol implementations, and a plethora of methods of sharing resources. Typically, each vendor would have its own type of network card, cabling, protocol, and network operating system. A solution appeared with the advent of Novell NetWare which provided even-handed support for dozens of competing card/cable types, and a much more sophisticated operating system than most of its competitors. Netware dominated[12] the personal computer LAN business from early after its introduction in 1983 until the mid-1990s when Microsoft introduced Windows NT Advanced Server and Windows for Workgroups.

Of the competitors to NetWare, only Banyan Vines had comparable technical strengths, but Banyan never gained a secure base. Microsoft and 3Com worked together to create a simple network operating system which formed the base of 3Com's 3+Share, Microsoft's LAN Manager and IBM's LAN Server - but none of these was particularly successful.

During the same period, Unix workstations were using TCP/IP networking. Although this market segment is now much reduced, the technologies developed in this area continue to be influential on the Internet and in both Linux and Apple Mac OS X networking—and the TCP/IP protocol has replaced IPX, AppleTalk, NBF, and other protocols used by the early PC LANs.

Cabling[edit]

Early LAN cabling had generally been based on various grades of coaxial cable. Shielded twisted pair was used in IBM's Token Ring LAN implementation, but in 1984, StarLAN showed the potential of simple unshielded twisted pair by using Cat3 cable—the same simple cable used for telephone systems. This led to the development of 10BASE-T (and its successors) and structured cabling which is still the basis of most commercial LANs today.

While fiber-optic cabling is common for links between switches, use of fiber to the desktop is rare.[13]

Wireless media[edit]

Many LANs use wireless technologies that are built into Smartphones, tablet computers and laptops. In a wireless local area network, users may move unrestricted in the coverage area. Wireless networks have become popular in residences and small businesses, because of their ease of installation. Guests are often offered Internet access via a hotspot service.

Technical aspects[edit]

Network topology describes the layout of interconnections between devices and network segments. At the data link layer and physical layer, a wide variety of LAN topologies have been used, including ring, bus, mesh and star. At the higher layers, NetBEUI, IPX/SPX, AppleTalk and others were once common, but the Internet Protocol Suite (TCP/IP) has prevailed as a standard of choice.

Simple LANs generally consist of cabling and one or more switches. A switch can be connected to a router, cable modem, or ADSL modem for Internet access. A LAN can include a wide variety of other network devices such as firewalls, load balancers, and network intrusion detection.[14] Advanced LANs are characterized by their use of redundant links with switches using the spanning tree protocol to prevent loops, their ability to manage differing traffic types via quality of service (QoS), and to segregate traffic with VLANs.

LANs can maintain connections with other LANs via leased lines, leased services, or across the Internet using virtual private network technologies. Depending on how the connections are established and secured, and the distance involved, such linked LANs may also be classified as a metropolitan area network (MAN) or a wide area network (WAN).

See also[edit]

References[edit]

  1. ^ Gary A. Donahue (June 2007). Network Warrior. O'Reilly. p. 5. 
  2. ^ Samuel F. Mendicino (1970-12-01). "Octopus: The Lawrence Radiation Laboratory Network". Rogerdmoore.ca. Archived from the original on 2010-10-11. 
  3. ^ "THE LAWRENCE RADIATION LABORATORY OCTOPUS". Courant symposium series on networks. Osti.gov. 29 Nov 1970. OSTI 4045588. 
  4. ^ "A brief informal history of the Computer Laboratory". University of Cambridge. 20 December 2001. Archived from the original on 11 October 2010. 
  5. ^ "Ethernet Prototype Circuit Board". Smithsonian National Museum of American History. Retrieved 2007-09-02. 
  6. ^ "Ethernet: Distributed Packet-Switching For Local Computer Networks". Acm.org. Retrieved 2010-10-11. 
  7. ^ "ARCNET Timeline" (PDF). ARCNETworks magazine. Fall 1998. Archived from the original (PDF) on 2010-10-11. 
  8. ^ Lamont Wood (2008-01-31). "The LAN turns 30, but will it reach 40?". Computerworld.com. Retrieved 2016-06-02. 
  9. ^ "'The Year of The LAN' is a long-standing joke, and I freely admit to being the comedian that first declared it in 1982...", Robert Metcalfe, InfoWorld Dec 27, 1993
  10. ^ "...you will remember numerous computer magazines, over numerous years, announcing 'the year of the LAN.'", Quotes in 1999
  11. ^ "...a bit like the Year of the LAN which computer industry pundits predicted for the good part of a decade...", Christopher Herot
  12. ^ Wayne Spivak (2001-07-13). "Has Microsoft Ever Read the History Books?". VARBusiness. Archived from the original on 2010-10-11. 
  13. ^ "Big pipe on campus: Ohio institutions implement a 10-Gigabit Ethernet switched-fiber backbone to enable high-speed desktop applications over UTP copper", Communications News, 2005-03-01, As alternatives were considered, fiber to the desk was evaluated, yet only briefly due to the added costs for fiber switches, cables and NICs. "Copper is still going to be a driving force to the desktop for the future, especially as long as the price for fiber components remains higher than for copper." 
  14. ^ "A Review of the Basic Components of a Local Area Network (LAN)". NetworkBits.net. Retrieved 2008-04-08. 

External links[edit]

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