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Tle Advantages and Disadvantages 4th
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Cards (13)
Computer Networks
Classified according to
geographical
distribution of computers in the
network
Local Area Network
(
LAN
)
Connects computers
inside
a
room
or several rooms in a
building
Examples:
school
,
university
, small scale
business
or an
office
Metropolitan Area Network
(
MAN
)
Combination
of several
Local Area Networks
which covers less than
16
miles
Examples:
banking
networks, institutes and
universities
with
branches
Wide Area Network
(
WAN
)
Covers a
wide
area, within or outside a country
Best example: the
Internet
Network topology
The
pattern
of connection in designing computer
network
Types of Network Topologies
Star
Topology
Bus
Topology
Ring
Topology
Tree
Topology
Mesh
Topology
Star Topology
Centralizing
a switch/hub and
computers
Bus Topology
All
connections
established through a
main
cable
(backbone)
Limited
number of computers can be connected
Fewer
cables
required
Ring
Topology
Computers positioned in a
ring
/bangle and connected through
cables
Data
/information move in a
circular
manner
Breakdown
of one computer/cable can lead to breakdown of
entire
network
Tree Topology
Characteristics of both
bus
and
star
topologies
Several star topologies connected to a
bus backbone
cable
Ability to control each
network
individually
Mesh
Topology
All computers
connected with each other
Complex connection pattern,
costly
and
difficult
to control
Breakdown
of one computer does not affect other
connections
Benefits of Networking
Data
and
information
can be shared between computers
Less
storage space
Ability
to share resources
Ability to control
central software
Ability to
connect
at
any
where
and at any time
Security
Electronic mail
Disadvantages of Networking
Possible
security
issues
Breakdown
of
network
Virus
Computer
break downs
Training
requirements