Advantages of Star Network:
i) Simple access protocols
As
we know that a star network involves only the central terminal and one
peripheral terminal. In this situation, contention for those who has
control of the medium for transmission purposes is easily solved.
ii) Problem Diagnosis
As
the central terminal is connected directly to every other terminal in
star network so, the fault can easily detected and isolated. When this
type of problems occurs then simply disconnected failing terminals from
the network.
iii) Ease of service
Easily
service available for every directly to every because star topology has
a number of concentration point i.e. at intermediate wiring closet.
These provide easy access for service of reconfiguration of the network.
Disadvantage of star network:
i) Control Node (terminal) Dependency
As
all the terminals depend on the central node(terminal), so that the
problem arises is that if the central terminal (server) in a star
network fails, the entire network is rendered in operation. This
introduces heavy reliability and recurrence constraints on this
terminal.
ii) long Cable length:
As
in star network each terminal is directly connected to the center, also
a star network is consist of a large quantity of cable so that
overloading in cable channel and maintenance and installation problems
can increase costs.
