Play Video
1
The Glitch Mob - Local Area Network
The Glitch Mob - Local Area Network
::2012/06/22::
Play Video
2
What is a LAN (Local Area Network)
What is a LAN (Local Area Network)
::2013/02/18::
Play Video
3
Network Scope - Local Area Network (LAN)
Network Scope - Local Area Network (LAN)
::2013/03/09::
Play Video
4
What is a LAN (Local Area Network)
What is a LAN (Local Area Network)
::2010/09/10::
Play Video
5
09 :: CCNA R&S Exam Course :: Local Area Networks (LANs) Overview
09 :: CCNA R&S Exam Course :: Local Area Networks (LANs) Overview
::2012/04/06::
Play Video
6
LAN LOCAL AREA NETWORKS
LAN LOCAL AREA NETWORKS
::2006/12/07::
Play Video
7
01 - Networking Fundamentals  - Understanding Local Area Networking
01 - Networking Fundamentals - Understanding Local Area Networking
::2014/05/27::
Play Video
8
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:
::2014/03/26::
Play Video
9
My Local Area Network Setup
My Local Area Network Setup
::2012/02/20::
Play Video
10
What is VLAN, a Great Introduction to Virtual Local Area Networks
What is VLAN, a Great Introduction to Virtual Local Area Networks
::2012/10/29::
Play Video
11
How To Setup a LAN Connection in Windows 7
How To Setup a LAN Connection in Windows 7
::2011/10/17::
Play Video
12
How to hack local area network
How to hack local area network
::2012/01/07::
Play Video
13
Sharing Internet Connection on a Local Area Network using a Router
Sharing Internet Connection on a Local Area Network using a Router
::2011/04/08::
Play Video
14
What is LAN MAN CAN WAN - Networking part 4
What is LAN MAN CAN WAN - Networking part 4
::2012/01/05::
Play Video
15
How local area network works
How local area network works
::2011/07/04::
Play Video
16
Local Area Network connection doesn
Local Area Network connection doesn't have a valid IP configuration-Easily Fixed
::2014/03/01::
Play Video
17
How are IP Packets Routed on a Local Area Network?
How are IP Packets Routed on a Local Area Network?
::2012/04/14::
Play Video
18
Lecture - Local Area Networks
Lecture - Local Area Networks
::2012/09/26::
Play Video
19
Local Area Network - Get Into My Life (Extended Mix)
Local Area Network - Get Into My Life (Extended Mix)
::2012/10/12::
Play Video
20
CSE 574S-10-6A: Wireless Local Area Networks (WLANs) Part I
CSE 574S-10-6A: Wireless Local Area Networks (WLANs) Part I
::2013/08/14::
Play Video
21
VLAN: Virtual Local Area Network
VLAN: Virtual Local Area Network
::2012/03/14::
Play Video
22
Local Area Network - Get Into My Life (Club Mix)
Local Area Network - Get Into My Life (Club Mix)
::2012/10/12::
Play Video
23
Speed Test Local Area Network how to test your local network speed
Speed Test Local Area Network how to test your local network speed
::2012/10/09::
Play Video
24
Cara Membuat Jaringan LAN (Local Area Network)
Cara Membuat Jaringan LAN (Local Area Network)
::2014/03/08::
Play Video
25
Lecture   Local Area Networks
Lecture Local Area Networks
::2012/09/25::
Play Video
26
Intro to Local Area Network and Wide Area Networking
Intro to Local Area Network and Wide Area Networking
::2010/06/10::
Play Video
27
How to Set up a NEW connection(Local Area Connection) & Connect to Internet in Windows 7
How to Set up a NEW connection(Local Area Connection) & Connect to Internet in Windows 7
::2011/10/17::
Play Video
28
Windows 7
Windows 7's Local Area Network Connection Properties
::2013/03/15::
Play Video
29
Local Area Connection doesn
Local Area Connection doesn't have a valid IP config
::2012/12/20::
Play Video
30
Virtual Local Area Network: VLAN
Virtual Local Area Network: VLAN
::2013/07/18::
Play Video
31
Que es una Red LAN ó Red de Area Local, Para Que Sirve y Sus Caracteristicas
Que es una Red LAN ó Red de Area Local, Para Que Sirve y Sus Caracteristicas
::2013/10/25::
Play Video
32
Wireless Local Area Network Feature Introduction
Wireless Local Area Network Feature Introduction
::2014/05/03::
Play Video
33
Building Your Own Network for a Computer Lab
Building Your Own Network for a Computer Lab
::2013/02/15::
Play Video
34
Local Area Network - Get Into My Life (Extended Mix)
Local Area Network - Get Into My Life (Extended Mix)
::2012/11/16::
Play Video
35
Virtual Local Area Network In Packet Tracer   Part : 1
Virtual Local Area Network In Packet Tracer Part : 1
::2011/05/25::
Play Video
36
Establishing a Local Area Network LAN
Establishing a Local Area Network LAN
::2014/08/06::
Play Video
37
How to Find your IP Address on a Local Area Network (LAN)
How to Find your IP Address on a Local Area Network (LAN)
::2012/08/27::
Play Video
38
HowTo: Find Your LAN IP Address Tutorial
HowTo: Find Your LAN IP Address Tutorial
::2012/08/21::
Play Video
39
IS330 BYUH Components of a Local Area Network (LAN)
IS330 BYUH Components of a Local Area Network (LAN)
::2010/02/18::
Play Video
40
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
::2014/06/17::
Play Video
41
Local Area Network (LAN) Bandwidth Sources
Local Area Network (LAN) Bandwidth Sources
::2012/04/13::
Play Video
42
How to make a Minecraft Server Part 4: LAN Local Area Network
How to make a Minecraft Server Part 4: LAN Local Area Network
::2014/10/02::
Play Video
43
Local area connection problem
Local area connection problem
::2010/01/12::
Play Video
44
Wireless and Local Area Network connections setting GUIDE for Latest High Quality diagnostic test GM
Wireless and Local Area Network connections setting GUIDE for Latest High Quality diagnostic test GM
::2013/07/23::
Play Video
45
[Bài giảng CCNA 14] - Bài Giảng VLAN (Virtual Local Area Network) - Phần 2
[Bài giảng CCNA 14] - Bài Giảng VLAN (Virtual Local Area Network) - Phần 2
::2011/11/30::
Play Video
46
HOW TO SETUP YOUR LOCAL AREA NETWORK [PACKET TRACER]
HOW TO SETUP YOUR LOCAL AREA NETWORK [PACKET TRACER]
::2014/01/15::
Play Video
47
Local Area Network - Yassin
Local Area Network - Yassin 'Hesk' Zafar
::2014/04/08::
Play Video
48
[Bài giảng CCNA 14] - Bài Giảng VLAN (Virtual Local Area Network) - Phần 3
[Bài giảng CCNA 14] - Bài Giảng VLAN (Virtual Local Area Network) - Phần 3
::2011/11/30::
Play Video
49
LAN Configuration Setup of the Internet Cafe Network
LAN Configuration Setup of the Internet Cafe Network
::2013/06/24::
Play Video
50
LANs (Local Area Networks) defined/explained. What is a LAN?
LANs (Local Area Networks) defined/explained. What is a LAN?
::2012/12/27::
NEXT >>
RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
Jump to: navigation, search

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a home, school, computer laboratory, or office building, using network media.[1] The defining characteristics of LANs, in contrast to wide area networks (WANs), include their smaller geographic area, and non-inclusion of leased telecommunication lines.[citation needed]

ARCNET, Token Ring and other technology standards have been used in the past, but Ethernet over twisted pair cabling, and Wi-Fi are the two most common technologies currently used to build LANs.

History[edit]

A conceptual diagram of a local area network using 10BASE5 Ethernet

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[2][3] gave a good indication of the situation.

Cambridge Ring was developed at Cambridge University in 1974[4] but was never developed into a successful commercial product.

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, Metcalfe and 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]

Standards evolution[edit]

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 computer workstations from vendors such as Sun Microsystems, Hewlett-Packard, Silicon Graphics, Intergraph, NeXT and Apollo were using TCP/IP based 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 now almost completely 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.

Fiber-optic cabling is common for links between switches, but fiber to the desktop is uncommon.

Wireless[edit]

As well as traditional cabling, many LANs are now based partly or wholly on wireless technologies. Almost all of today's smartphoness, tablets and laptops have wireless support built-in so a wireless local area network, or WLAN, gives users the ability to move around within a local coverage area and still be connected to the network. Wireless networks have become popular in domestic homes due to ease of installation, and in commercial complexes to offer easy network access to their staff. Visiting guest 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, but the most common LAN topology in use today is switched Ethernet. At the higher layers, the Internet Protocol (TCP/IP) has become the standard, replacing NetBEUI, IPX/SPX, AppleTalk and others.

Simple LANs generally consist of one or more switches. A switch can be connected to a router, cable modem, or ADSL modem for Internet access. Complex 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. A LAN can include a wide variety of network devices such as switches, firewalls, routers, load balancers, and sensors.[13]

LANs can maintain connections with other LANs via leased lines, leased services, or the Internet using virtual private network technologies. Depending on how the connections are established and secured in a LAN, and the distance involved, a LAN 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 2010-10-11. 
  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". ARCNETworks magazine. Fall 1998. Archived from the original on 2010-10-11. 
  8. ^ Lamont Wood (2008-01-31). "The LAN turns 30, but will it reach 40?". Computerworld.com. Retrieved 2010-10-11. 
  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. ^ "A Review of the Basic Components of a Local Area Network (LAN)". NetworkBits.net. Retrieved 2008-04-08. 

External links[edit]

Wikipedia content is licensed under the GFDL License
Powered by YouTube
LEGAL
  • Mashpedia © 2014