Sunday, May 13, 2012
Networking
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A computer network is a collection of two or more computers, which
are connected together to share information and resources. Computers in a
network are interconnected by telephone lines, coaxial cables, satellite links,
radio and/or some other communication technique. A network can be as few as
several personal computers on a small network or as large as the internet, a
worldwide network of computers.
Advantages of NETWORK
Speed. Sharing and transferring files within Networks are very rapid. Thus
saving time, while maintaining the integrity of the file.
Cost. Individually licensed copies of many popular software programs can be
costly. Networkable versions are available at considerable savings. Shared
programs, on a network allows for easier upgrading of the program on one single
file server, instead of upgrading individual workstations.
Security. Sensitive files and programs on a network are
passwords protected (established for specific directories to restrict access to
authorized users) or designated as "copy inhibit," so that you do not
have to worry about illegal copying of programs.
Centralized Software Management. Software can
be loaded on one computer (the file server) eliminating that need to spend time
and energy installing updates and tracking files on independent computers
throughout the building.
Resource Sharing. Resources such as, printers, fax machines and modems
can be shared.
Electronic Mail. E-mail aids in personal and professional
communication. Electronic mail on a LAN can enable staff to communicate within
the building having tot to leave their desk.
Flexible Access. Access their files from computers throughout the
firm.
Workgroup Computing. Workgroup software (such as Microsoft BackOffice)
allows many users to work on a document or project concurrently.
§ Server faults stop applications being available.
§ Network faults can cause loss of data.
§ Network fault could lead to loss of resources.
§ User work dependent upon network.
§ System opens to hackers.
§ Decisions tend to become centralized.
§ Could become inefficient.
§ Could degrade in performance.
§ Resources could be located too far from users.
§ Network management can become difficult.
