NETWORKS

NETWORKS

1. WHAT IS A NETWORK?

   • A network is two or more computers, or other electronic devices, connected together so that they can exchange data.

2. WHY USE NETWORKS?

   • Easily share files and data, Share resources such as printers and Internet connections Communicate with other network users (e-mail, instant messaging, video-conferencing, etc.), Store data centrally (using a file server) for ease of access and back-up, Keep all of our settings centrally so we can use any workstation...

3. LAN TROPOLOGIES

   • The topology of a network means how the different parts are arranged and connected together.

4. NETWORKING HARDWARE

   • Any computer that is to be connected to a network, needs to have a network interface card (NIC). Most modern computers have these devices built into the motherboard, but in some computers you have to add an extra expansion card (small circuitboard)

5. THE INTERNET

   • The Internet is a world-wide network that has grown and evolved from an experimental network (ARPANet) created by the US military back in the 1960s. Over the years, as more and more computers and networks have connected to this network, it has grown into the Internet that we know today.

6. NETWORK AND DATA SECURITY

   • A network allows a person who does to have physical access to your computer (they are not sitting in front of it) to gain access all the same. If your computer is connected to a network, other people can connect to your computer.

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