A network switch is a telecommunications device that receives messages and sends them to their intended destinations. It connects network segments or devices and forwards data to one or multiple targets that need to receive it. Switches operate at the data link layer to process and forward data, unlike hubs but similar to routers. They improve network performance by reducing broadcast domains and using hardware to map ports to device addresses.

1. 14/COM/05

2. CONTENT
1. INTRODUCTION
2. SIMPLE NETWORK WITH SWITCH
3. APPLICATIONS OF SWITCHES
4. FUNCTIONS & ROLE
5. SWITCH vs HUB
6. SWITCH vs ROUTER
7. ADVANTAGES
8. DISADVANTAGE

3. Introduction to NETWORK SWITCH
 A network switch is a device used to
connect network segments or network
devices.
 Network switch receive messages and send
them to the targeted audience.
 It is a telecommunication device that uses
the packet switching to receive , process and
forward data to the destination address

5. CONTD…..
Network switch forwards data to one
or multiple devices that need to
receive it.
Switches are the multiport network
bridges that process and forward data
at the data link layer(layer 2 of OSI
model).

6. Network with a Switch

7. APPLICATIONS OF SWITCHES
 A switch is a device used in a computer
network to physically connect the devices
together.
 A switch can transfer data to any of the other
devices at a time using half duplex mode or
full duplex mode.
 A switch can manage the flow of data across
the network.

8. Contd…
A network switch plays an integral part in
most modern Ethernet LANs. Mid to large
sized LANs contain a number of linked
managed switches
Each network device is connected to a
switch is identified using a MAC address
or a hardware address. There fore, a
switch is also considered as a intelligent
network hub.

9. Switch vs hub

10. What
happened when hub received a message ?

12. What happened when switch received a
message ?

15. Switch vs Router

18. ADVANTAGES
 The number of broadcast domains gets
decreased.
 Unlike hub, switches are more hardware
oriented.
 It can make use of CAM table for port to MAC
mapping.
 Unlike router , multi ports of switches are
available in lower cost.
 It helps in logical segmentation by supporting
VLAN.

19. DISADVANTAGE
 Proper designing and configuration is
required if multicast packets are being
handled.
 While limiting broadcasts, switches
are not as good as routers.