Hub - Network Device Class 11 and 12

 HUB:

1. Hub is a network device

2. Hub is a Physical Layer device.

3. Hub is a multiport device.

4. Signal travel in the form of bits in Hub.

5. Hub support electric signal

6. Hub is a half duplex device

7. Hub is an unintelligent device

8. Hub does not learn or store MAC address

9. Collision occurs commonly in Hub

10. Hub support only single collision dimension

11. Hub does not support Advanced features like VLAN, STP, RSTP etc.

Types of Hub:

1. Active Hub

Which hub have own power supply is called active hub.

2. Passive Hub

Which hub used Active hub power supply is called passive hub.