Subject: Computer Networks Topics: INTRODUCTION TO COMPUTER NETWORKS TYPES OF THE NETWORK INTRODUCTION TO TOPOLOGY

1. Presentation on topology
 Submitted to : Mahmudul Hasan, Lecturer, Dept. of ETE
 Course Name: Computer Networks
 Course Code : ETE 331

2. Preparedby:
Imran Hossain Nayem
ID: 161-19-1871
Dept. of Electronices and Telecommunication
Eingineering
Daffodil international University
itsImranHossainNayem ImranHossainNayem

3. Raihan Ul Islam
ID: 161-19-1844
Dept. of Electronices and Telecommunication
Eingineering
Daffodil international University
https://goo.gl/rdngBH
Assist by:
Muhammad Saiful Alam
ID: 161-19-1859
Dept. of Electronices and Telecommunication
Eingineering
Daffodil international University
Mr.saifullive https://goo.gl/ghCKYR

4. Agenda:
01 INTRODUCTION TO COMPUTER NETWORKS
02
INTRODUCTION TO TOPOLOGY03
TYPES OF THE NETWORK

5. 01 INTRODUCTION TO COMPUTER NETWORKS 01
• Computer network connects two or more autonomous computers.
• The computers can be geographically located anywhere.
• The computer network may be located in a room, building, city, country, or anywhere in
the world.

6. 01 INTRODUCTION TO COMPUTER NETWORKS 02
Advantages of Computer Networks:
FILE SHARING – Networks offer a quick and easy way to share
files directly.
RESOURCE SHARING – All computers in the network can
share resources such as printers, fax machines, scanners, and
modems.
COMMUNICATION –Those on the network can communicate
with each other via e-mail, instant message etc.

7. 01 INTRODUCTION TO COMPUTER NETWORKS 03
Advantages of Computer Networks:
Flexible Access - Networks allow their users to access files
from computers throughout the network.
Sharing of Information - Computer networks enable us to
share data and information with the computers that are
located geographically large distance apart.

8. 02 TYPES OF THE NETWORK 04
The different types of network are based on following:
Size of the network – Refers to the area over which the network is spread.
Connection – Refers to the transmission media and protocols used for connecting.
Network topology – Arrangement of computers on the network.

9. 02 TYPES OF THE NETWORK 05
Networking Types are three
kinds –
1.LAN - Local Area Network
2.MAN - Metropolitan Area
Network
3.WAN - Wide Area Network

10. 02 LAN - Local Area Network 06
• LAN is a computer network widely used for local
communication.
• LAN connects computers in a small area like a room, building,
office, or a campus spread up to a few kilometers.
• They are privately owned networks, to exchange information.
LAN - Local Area Network

11. 02 LAN - Local Area Network 07
LAN - Local Area Network
• Star, Bus, and Ring are some of the common LAN
networking topologies.
• LAN runs at a speed of 10 mbps to 100 mbps and has
low delays.
• A LAN based on wifi wireless network technology is
called wireless local area network (WLAN).

12. 02 MAN - Metropolitan Area Network 07
• MAN is a larger computer network that usually spans
several buildings in the same city or town.
• The computers in a MAN are connected using cables.
• MAN connects several LAN spread over a city.
• It covers the distance upto 30-50 km.
MAN - Metropolitan Area Network

13. 02 WAN - Wide Area Network 08
• WAN is a network that connects computers over long
distances like cities, countries, continents or world wide.
• WAN uses public, leased, or private communication
links to spread over long distances.
• WAN uses telephone lines, satellite link and radio link
to connect.
WAN - Wide Area Network

14. 03 INTRODUCTION TO TOPOLOGY 09
The network topology defines the way in which computers, printers, and other devices are
connected.
Network Topology:
A network topology describes the layout of the wire and devices as well as the paths used by
data Transmissions.

15. 03 INTRODUCTION TO TOPOLOGY 10

16. 03 Bus Topology 11
Bus topology uses one main cable to which all nodes are directly connected. The main cable
acts as a backbone for the network. One of the computers in the network typically acts as the
computer server. The first advantage of bus topology is that it is easy to connect a computer or
peripheral device.

17. 03 Bus Topology 12
How does a bus network topology work?
A bus network is an arrangement in a local area network (LAN) in which each node (workstation
or other device) is connected to a main cable or link called the bus. The illustration shows a bus
network with five nodes.

18. 03 Bus Topology 13
• Reliable in very small networks as well
as easy to use and understand.
• Requires the least amount of cable to
connect the computers together and
therefore is less expensive than other
cabling arrangements.
• Heavy network traffic can slow a
bus considerably.
• Each connection between cables
weakens the electrical signal.
Advantages Disadvantages

19. 03 Ring Topology 14
A frame travels around the ring, stopping at each
node. If a node wants to transmit data, it adds the data
as well as the destination address to the frame.
The frame then continues around the ring until it finds
the destination node, which takes the
data out of the frame.

20. 03 Ring Topology 15
• Single ring – All the devices on the network share a single cable
• Dual ring – The dual ring topology allows data to be sent in both directions.

21. 03 Ring Topology 16
• Ring networks can span longer
distances than other types of networks.
• Ring networks are easily extendable.
• Relatively expensive and difficult to
install.
• Failure of one computer on the network
can affect the whole network.
Advantages Disadvantages

22. 03 Ring Topology 17
A hybrid topology is a type of network topology that uses two or more other network topologies,
including bus topology, mesh topology, ring topology, star topology, and tree topology.

23. 03 Tree Topology 18
A tree topology connects one star network to the other star network. It is an extension of star
topology. Here, the whole network divided into segment which can be easily managed and
maintained.

24. 03 Tree Topology 19
• Each segment is provided with
dedicated point-to-point wiring to
central hub.
• Error detection and correction is easy.
• If one segment is damaged, other
segment are not affected.
• Multiple segments are connected to a central
hub, the networks depend heavily on the hub.
Its failure affects the entire network.
• Maintenance is not easy and cost are high.
• With increase in size beyond a point, the
management becomes difficult.
Advantages Disadvantages

25. 03 Star Topology 20
Star Topology

26. Credit 21
Special thanks to our honorable teacher for
making this subject understand and interesting.