Communication devices

Communication devices

1. Communication Devices By Alia Yousaf

2. Objectives Students will be able to know about communication devices.

3. What is a communication device?

4. Communication Devices A communication device is hardware that is used for transmission of information from one place to another between computers and other devices.

5. Commonly Used Devices In Data Communication Dial-up Modem Network Interface Card Router Switch/ Access Point

6. Dial-up Modem

7. Dial-up Modem Dial-up modem provides internet connection through telephone line. Maximum speed of dial-up modem is 56 kbps. It is being replaced by faster DSL connection. Modem converts digital computer signal to analog form for transmission over telephone line.

8. Network Interface Card (NIC) A Network Interface Card (NIC) is used to connect computers together to create computer network. A   network interface card  (NIC) is a hardware component without which a computer cannot be connected over a  network . It is a circuit board installed in a computer that provides a dedicated  network  connection to the computer. It is also called  network interface controller ,  network adapter  or LAN  adapter .

9. Network Interface Card (NIC)

10. Router Router is a communication device that is used when two networks have to be connected for communication. They send information from one network to another by selecting the best pathway available.

11. Types of Router Wired Router Wireless Router

12. Switch / Access Point A switch/access point is used for connecting computers together in local area network(LAN). Switch is used in wired networks. Access point is used in wireless networks. A Switch/access point receives information from a computer in a network , inspects it and then transmits it to the destination computer.

13. Switch

14. Access Point

15. Thank You