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One
of the most important parts of the computer
networks is computer server. It is
responsible for presentation of services
like file transfer, print services and etc.
Due to the growth of traffic in the network,
some problems maybe occur for the server. To
solve this problem, the number of servers'
computer is increased, which these servers
are called special servers. Two common
servers are File Print Servers and
Application Server. The former is
responsible of services like file
reservation and rename. It gets these orders
from the recipient ones. This server is also
responsible of the printer's affairs. When a
user sends a request of file access in the
server, the server computer sends a copy of
full file to it. In this case, the user can
edit the file locally, on his computer. The
Print Saver is responsible of users' request
of print reception. The server lines up the
requests and prints them in turn. This
process is called Spooling. With help of S
pooling, users can continue their work on
computer, without waiting for the print
order. The later server is called
Application Server. It runs the
Client/server programs and supplies the
recipient server's data. The servers keep an
enormous capacity of information in
themselves. For quick and easy regain of
information, these data are reserved in a
definite structure. When a user sends such a
request to this server, the server transfers
the result to the user's computer. For
example, imagine a commercial company wants
to advertise for a series of its new
products. To decrease the traffic, it can
advertise just a group of products for
costumers with definite income . |
