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What is a Network Hub?

Hub is the most simple networking device which is used to connect all network devices on an internal network. It detects whether a device is physically connected to it or not. It is a Layer 1 device in OSI reference model and is best for small and simple local area networks.

It is not intelligent because it does not filter any data. When a packet is received by one port, the data is copied to all other ports and is seen by all connected devices. It has 4/12 ports.

Drawbacks of Hubs are:-
  • Rebroadcast- Forwards packets across all ports.
  • Creates Security concerns- Traffic could not be safeguarded.
  • Unnecessary traffic which reduces bandwidth.



  

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