NETWORKING
Computer networking relates
to the communication between a group of two or more computer systems linked
together.
The network of computer can be classified as
LOCAL AREA NETWORK (LAN):
It is a system in which computer
can be inter-connected within a geographical spread over 1km. All the terminals
are connected to the main computer called server.
WIDE AREA NETWORK (WAN):
In a WAN the connected computer
are much far from each other and are connected by telephone lines or radio
webs. Such network may spread across countries.
METROPOLITAN AREA NETWORK (MAN):
It is data network design for
a town or a city. It is main purpose to share hardware and software resource
among the various users e.g., a cable TV network.
NETWORK RELATED TERMS
TOPOLOGY:
A network topology in
physical layout of the computers, cables other peripherals on network. E.g.,
Bus Topology, Tree Topology Mesh Topology, Ring Topology.
NETWORK INTERFACE CARD (NIC):
It is also called network
adopter. It is hardware component that connect a computer to a computer network.
INTERNET:
It is a public or global network
that connects computer systems across the world called internet.
INTRANET:
It is Private utilizing
internet type tools, but available only within that organization.
EXTRANET:
It is an internet that can be
partially accessed by authorized outside users, enabling to exchange information
over the internet in a secure way called extranet.
PUBLIC SWITCH TELEPHONE NETWORK (PSTN):
It is a design for telephone, which required modem for data communication.
VALUE ADDED NETWORK (VAN):
It provides electronic data
interchange (EID) facility. It subscribe like invoices, sale-purchase order.
INTEGRATED SERVICE DIGITAL NETWORK
(ISDN):
It is used voice, video and
data services It uses data transmission and it combined both circuit and packet
switching.
FIREWALL:
It is combination of software
and hardware based device permit or deny networks transmission based on a set
of rules and is frequently used to protect network from unauthorized access
while permitting legitimate communication to pass.
REPEATER:
It is used on a network to regenerate
signals to be sent over long distance.
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