This document summarizes various networking devices. It describes a NIC which allows additional network connectivity, a hub which interconnects devices, and a repeater which amplifies signals. Bridges were used to interconnect systems but have been replaced by switches, which are available in various ports and can be managed or unmanaged. Routers connect different networks like private and public networks. Firewalls block unauthorized traffic to protect networks. Wired connections include TP, coaxial, and fiber optic cables. Wireless technologies encompass infrared, Bluetooth, Wi-Fi, WiMax and satellite.

1. Networking Device
Prepared by Prem Sahu

2. NIC(Network Interface Card)
It is external network card which can be install in desktop system for
secondary use or inbuilt Ethernet port does not work properly.

3. HUB
It is used to distribute or interconnect the devices in the network

4. Repeater
It is used to amplify the signal strength in network

5. Bridge
It is used to inter connect the system earlier, nowadays it is replaced
by modern device switch.

6. Switch
Switch is used to inter connect the network
It is available in 8 port, 16 ports, 24 ports
It may be manageable and non- manageable

7. Switch connection to PC

8. Router
It is used to connect in two different network
It is used connect private network and public network
It is configured by routing protocol as per requirement and also access point to secure our
network.

9. Firewall
Hardware firewall is used to block or permit unnecessary traffic from out side of
network
It is works like security guard to protect our network from external threats

10. Wired or Cable
TP(Twisted Pair)
Co-axial
Fiber Optics

11. TP(Twisted Pair)
Two type of TP cable
 UTP( Unshielded Twisted Pair)
 STP( Shielded Twisted Pair)

12. Cable Connector
RJ45 (Register Jack)
BNC(British Naval Connector)

13. Wireless Technology
Infra Red
Bluetooth
Wi-Fi
Wimax
Satelite