3.1.1 Basic Concept Of Network.! (Mari Kita Kongsi!!)
What Is a Network?
A network is a collection of computers and devices connected together via communications devices and transmission media
~Shelly Cashman~
What Is Communication Device?
-A communications device is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device
~Shelly Cashman~
COMMUNICATION DEVICES :)
Dial-Up Modems
•A dial-up modem is a communications device that can convert
•digital signals to analog signals
•analog signals to digital signals
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Example of dial-up modem |
Digital Modems: ISDN, DSL, and Cable
•A digital modem is a communications device that sends and receives data and information to and from a digital line.
•Three types of digital modems are ;
1.ISDN modems
2.DSL modems 3.Cable modems.
Wireless Modems
•Wireless modems, which have an external or built-in antenna, are available as
1.USB flash drives
2.ExpressCard modules
3.PC Cards
4.Memory cards.
Network Card
•A network card, sometimes called a network interface card (NIC)
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This is Network Card |
•The network card coordinates the transmission and receipt of data, instructions, and information to and from the computer or device containing the network card
Wireless Access Points
•A wireless access point is a central communications device
•Allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network
Router
•A router is a communications device that connects multiple computers or other routers together and transmits data to its correct destination on a network.
•Routers also support wireless communications , eliminating the need for a separate wireless access point in a wireless network
Hubs and Switches
• A hub or switch is a device that provides a central point for cables in a network
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24-Port 10/100/1000 Gigabit Switching Hub SFP ZYXEL GS1920-24 |
Labels: sc_comp_note, sc_comp_note 05/10/2015