data communication and network

1. Course: B.Sc
Subject: Computations Skills
Unit-5.1
Data Communication and Networking

2. Definition of
Network Topology
Types of
Network Topology
Differentiation Between the
Types of Network Topology
CONTENT

3. What is a Topology ?
The physical topology of a network
refers to the configuration of cables,
computers and other peripherals.
DEFINITION

4. Bus network.
Ring network.
Star network.
TYPES OF NETWORK TOPOLOGY

5. All computers and devices
connected to central cable or bus.
Consists of a main run of cable
with a terminator at each end.
Popular on LANs because they
are inexpensive and easy to
install.
BUS TOPOLOGY

6. BUS TOPOLOGY

7. Cable forms closed ring or loop,
with all computers and devices
arranged along ring.
Data travels from device to
device around entire ring, in
one direction.
Primarily is used for LANs,
but also is used in WANs.
RING TOPOLOGY

8. RING TOPOLOGY

9. All devices connect to a
central device, called
hub.
All data transferred
from one computer to
another passes through
hub.
STAR TOPOLOGY

10. STAR TOPOLOGY

11. WHAT IS DIFFERENTIATION
BETWEEN THE THREE OF
NETWORK TOPOLOGY?
SEARCH IN THE INTERNET
DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY

12. ADVANTAGE DISADVANTAGE
1) Easy to connect computer or
peripheral to a linear bus.
1) Entire network shuts down if
there is a break in the main
cable.
2) Requires less cable length
than a star topology.
2) Terminators are required at
both ends of the backbone
cable.
3) Difficult to identify the
problem if the entire network
shuts down.
BUSBUS
DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY

13. ADVANTAGE DISADVANTAGE
1) Data is quickly transferred. 1) Data packets must pass
through every computer
between the sender and
recipient therefore, this makes
it slower.
2) The transmission of data is
relatively simple as packets
travel in one direction only.
2) If any of the nodes fail then the
ring is broken and data cannot be
transmitted successfully.
3) It is difficult to troubleshoot
the ring.
RINGRING
DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY

14. ADVANTAGE DISADVANTAGE
1) Easy to install and wire. 1) Requires more cable length
than a linear topology.
2) Security can be implemented
in the hub/switch.
2) If the hub or concentrator
fails, nodes attached are
disabled.
3) Easy to detect faults and to
remove parts.
3) More expensive than linear
bus topologies because of the
cost of the concentrators.
STARSTAR
DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY

15. DEFINITION
•All computers
and devices
connected to
central cable
DEFINITION
•All computers
and devices
connected to
central cable
BUS TOPOLOGY
ADVANTAGE
•Easy to connect a
computer or
peripheral to a linear
bus.
ADVANTAGE
•Easy to connect a
computer or
peripheral to a linear
bus.
•Requires less cable
length than
a star topology.
•Requires less cable
length than
a star topology.
DISADVANTAGE
•Entire network shuts
down if
there is a break in the
main cable.
DISADVANTAGE
•Entire network shuts
down if
there is a break in the
main cable.
•Terminators are
required at both
ends of the backbone
cable.
•Terminators are
required at both
ends of the backbone
cable.
•Difficult to identify
the problem
if the entire network
shuts down.
•Difficult to identify
the problem
if the entire network
shuts down.
SUMMARY

16. RING TOPOLOGY
DEFINITION
•Cable forms
closed ring or
loop, with all
computers and
devices arranged
along ring.
DEFINITION
•Cable forms
closed ring or
loop, with all
computers and
devices arranged
along ring.
ADVANTAGE
•Data is quickly
transferred without a
‘bottle neck’.
ADVANTAGE
•Data is quickly
transferred without a
‘bottle neck’.
•The transmission of
data is relatively
simple as packets
travel in one direction
only.
•The transmission of
data is relatively
simple as packets
travel in one direction
only.
DISADVANTAGE
•Data packets must pass
through every computer
between the sender and
recipient therefore, this
makes it slower.
DISADVANTAGE
•Data packets must pass
through every computer
between the sender and
recipient therefore, this
makes it slower.
•If any of the nodes fail
then the ring is broken
and data cannot be
transmitted successfully.
•If any of the nodes fail
then the ring is broken
and data cannot be
transmitted successfully.
•It is difficult to
troubleshoot
the ring.
•It is difficult to
troubleshoot
the ring.
SUMMARY

17. DEFINITION
•All devices
connect to a
central device,
called hub.
DEFINITION
•All devices
connect to a
central device,
called hub.
ADVANTAGE
•Easy to install and
wire.
ADVANTAGE
•Easy to install and
wire.
•Security can be
implemented
in the hub/switch.
•Security can be
implemented
in the hub/switch.
DISADVANTAGE
•Requires more cable
length
than a linear topology.
DISADVANTAGE
•Requires more cable
length
than a linear topology.
If the hub or
concentrator fails,
nodes attached are
disabled.
If the hub or
concentrator fails,
nodes attached are
disabled.
More expensive than
linear bus topologies
because of the cost of
the concentrators.
More expensive than
linear bus topologies
because of the cost of
the concentrators.
STAR TOPOLOGY
•Easy to detect faults
and to
remove parts
•Easy to detect faults
and to
remove parts
SUMMARY

18. Reference
1. INFORMATION TECHNOLOGY APPLICATIONS FOR BUSINESS:
2. Dr. S.Sudalaimuthu and R. Hariharan.: Himalaya publishing house.
3. INFORMATION TECHNOLOGY FOR MANAGEMENT: B.Muthukumaran,
Oxford university press Computer Fundamentals, Goyal, Anita 1st Edition, Pearson
Education.
4. Introduction to Information Technology by Leon and Leon, Vikas Publishing
House.
5. Information Systems Today, 2e by Leonard Jessup, Joseph Valacich, PHI
6. Management Information Systems by Laudan & Laudan, Pearson Publications
Computer Network, by Andrew Tannebaum Pearson.
7. Data Communication & Networking, by Forouzen TMH.
8 Data Communication & Computer Networks, by Brijindra Singh PHI.
9. Data & Computer Communication, by Williams Stallings PHI.