Page 109 - DLIS407_INFORMATION AND LITERATURE SURVEY IN SOCIAL SCIENCES

Information and Literature Survey in Social Sciences

Notes y A diameter of not more than a few kilometers
y A total data-rate of at least several MBPs
y A single organization has complete ownership

Caution This is called LAN, as all the terminals and peripherals are located within a
building or complex. Input of data and access to data is possible through any
of the terminals or computers linked with the central computer’s processor;
this system is most suited for offices. Libraries, factories, departmental shops,
educational institutions etc.

MAN

Metropolitan Area Network covers the entire city, using LAN technology.

WAN

Wide Area Network constitutes a number of autonomous computers distributed over a large
geographical area including city, state, region, nation or the world. Transmission facility is generally
through satellites.

Self Assessment

State whether the following statements are True or False:
6. Wide Area Network is a facility data communication, video or voice, within a single building
or over a small area of space.
7. Metropolitan Area Network covers the entire city, using LAN technology.
8. Local Area Network constitutes a number of autonomous computers distributed over a large
geographical area including city, state, region, nation or the world.

12.3 Type of Network-based Information Services

The following are the key types of network based information services:
y Bibliographic Information Service
y Full text access to publications
y Organization of Internet resources and providing access
y Providing access to information of Indian origin
y Promoting the discussion for a different subjects
y Consortia-based services
y Pattern service

12.3.1 Bibliographic Information Service

Bibliographic services include the creation of bibliographic records and the compilation of
bibliographies, catalogues, indices or any other form of bibliographic database. Access to the databases

104 LOVELY PROFESSIONAL UNIVERSITY