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Part 16- HUB (Networking Devices)- Computer Networking- CCNA

hello friends , Today we will discuss about the second Networking Devices Ethernet HUB.

HUB

Hub is a centralize device via all devices (computers, printers etc.) are connected with the star topology. 
Hub connects other multiple devices together and helps to make connectivity mutually so that they can share and transfer data to each and every devices which is connected to that hub. 
Hub does work at the first layer means at Physical layer of the OSI Model.
Hub has many ports, and each port works like a repeater so Hub is also known as Multiport Repeater.

A Hub


Types of Hubs.
there are three kind of Hubs.
Active , passive and Manageable hubs.

1. Active Hubs - These hubs regenerates and amplify the signals to keep them strong. one more thing there is electricity needed in the active Hubs.

2. Passive Hubs- Passive Hubs simply forward the received signals. this type of hub does not make pure signal or regenerate so  these passive hubs doesn't need electricity. 

3. Manageable Hubs or Intelligent Hubs- These hubs works same as Active hubs but some other important benefit of this manageable hubs are that  these hubs help administrator to monitor the data traffic which is passing through this hub. as well as it allow administrator to configure the each port of hub.

Intelligent HUB


Working of Hub -  As Hub receive the signal it repeat it and forward it to all ports. for example if there is 8 port hub and communication is to be for 1 t0 41 port  but hub will forward data to all 8 port . Remaining ports 5-8 will drop the data. 
           But the disadvantage of this hub is data traffic as we know because of unnecessary data forwarding will cause huge data traffic. and the data is sent in bulk without and source and destination address.



in the next part we will discuss about the third Networking Device  Bridge.,,,,

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