Page 35 - DLIS402_INFORMATION_ANALYSIS_AND_REPACKAGING

Information Analysis and Repackaging

Notes Types of Networks:

Presently, there are three types of computer networks:
• LAN
• MAN
• WAN

Local Area Network (LAN):

A LAN is a number of related computers and electronic devices that share information over a
transmission media.
A typical use of LAN is to tie together personal computers in an office so that they can all use a
single printer and a file server. The LAN can be within a building or a campus wide network.

Metropolitan Area Network (MAN)
Attempts are being made to develop this type of network in metropolitan areas such as Delhi, Calcutta,
Bangalore, Chennai, etc.

Wide Area Network (WAN)

A large-scale network, involving offices in different cities and countries is referred to as WAN, which
is specially designed to interconnect data transmission devices over wide geographical areas.

2.5.3 Categories of Network

Library networks have been divided into two categories: general network and specialized network.
The latter can further be divided into metropolitan network and countrywide network.

2.5.4 General Networks in India

NICNET:
Title: National Information Center Network
Sponsor: Planning Commission, Govt. of India.
Membership: Four national and regional nodes, 32 state and union territory nodes; seventy cities
and towns
Services: Bulk file transfer; teleconferencing; full text and bibliographic retrieval services
Application: ICMRNIC Center; MEDLARS in India; Chemical Abstracts database
INDONET:
Title: INDONET data Network
Sponsor: CMC Ltd (1986) = Informatics India Ltd (1989)
Membership: Commercial computer network
Services: Database services such as DIALOG, COMPUSERVE; IP; SHARP
Applications: ACME; file transfer; international gateway
I - NET (VIKRAM):
Title: I - NET
Sponsor: Dept. of Telecommunications, Govt. of India

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