What is the key advantage of using switches?

 Reduces the number of Broadcast domainsSupports VLAN's which can help in Logical segmentation 

3.  Switches  are more faster  as a layer 2 device example  Data Link Layer

Swithches Most imprternt in the Life cycle .

switches handle network traffic successfully...

Switches use Supervisor Engine (Brain of Switch) due to which they have fast switching capability and least latency.

switches are more faster as it is a layer 2 device (ie data link layer), it make a discussion locally. One of the main advantage of using the switches is that it broadcast to all the devies in the one network.

switch is more secure, and it's make any port communicate directly with any other port

 Compared to Bridges ,Switches are more H/w oriented therefore operations are less CPU intense[Basic operations].

The key advantage of using Network switches is that, it handle network traffic successfully, while making efficient use of the available network bandwidth.

distribue les données à chaque machine destinataire

To connect different hosts with the same Network, and to let them share same broadcast domain while seperating the collision domain, and ofcourse creating Vlans,VTPs,STPs,etc ..