WHAT IS LOCAL AREA NETWORK?
LAN is a local area network. It provides a networking capability to a group of computers that are situated in the same household, office building, etc. LAN is widely used and is quite convenient for sharing devices, files or applications.
In the past ARCNET, Token Ring and other standards have been used, but nowadays Ethernet over twisted pair cabling, and Wi-Fi are the two most commonly used technologies.
Early LAN cabling was based on various grades of coaxial cable. However shielded twisted pair was used in Token Ring and later Star LAN introduced the potential of simple unshielded twisted pair by using Cat3 - actually the same cable as used in telephone systems. All that led to the development of 10Base-T and structured cabling which is still the basis of majority of commercial LANs nowadays.
The cabling is not always possible and that makes Wi-Fi most spread technology as it requires minimal cabling and is well-suited to mobile laptops, tablets and phones.
- Late 1960s - larger universities and research labs obtained more and more computers. The pressure of providing high-speed interconnections increased.
- 1970 - Lawrence Radiation Laboratory reported the growth of their "Octopus" network.
- 1974 - Cambridge Ring was developed at Cambridge University, but it has never developed into a commercially successful product.
- 1973-1975 - Ethernet was developed at Xerox PARC.
- 1976 - After the system was deployed at PARC, Robert M. Metcalfe and David R. Boggs published their "Ethernet: Distributed Packet-Switching For Local Computer Networks."