1.5 networking

1.5 networking

1. MOST COMPUTERS AND DEVICES ARE CONNECTED TOGETHER VIA NETWORKS

   • A COMPUTER NETWORK IS A NUMBER OF COMPUTERS LINKED TOGETHER TO ALLOW THEM TO SHARE RESOURCES. NETWORKED COMPUTERS CAN SHARE HARDWARE, SOFTWARE AND DATA
   • NETWORKS ARE ALL AROUND YOU, IN SCHOOL, AT HOME IN BUSINESSES AND HOSPITALS
   • KEYWORDS TOPOLOGY MESH NETWORK STAR NETWORK WIFI ENCRYPTION ETHERNET
   • A MASH NETWORK IS WHERE SOME OR ALL OF THE WORKSTATIONS OR OTHER DEVICES ARE CONNECTED DIRECTLY TO EACH OF OTHER. MOST ARE USUALLY CONNECTED TO THE NODE THAT THEY EXCHANGE THE MOST DATA WITH
   • IN A STAR NETWORK, EACH DEVICE IS CONNECTED BY AN INDIVIDUAL CABLE DIRECTLY TO THE SERVER. STAR NETWORKS ARE USUALLY THE LAYOUT OF CHOICE IN SCHOOLS AND OFFICES BECAUSE THEY TEND TO BE THE MOST RELIABLE OF TOPOLOGIES.

2. WIFI IS WIRELESS FREQUENCY

   • RADIO WAVES ARE USED TO TRANSMIT DATA PACKETS WITHOUT THE NEED FOR WIRESS
   • THIS METHOD IS SLOWER AND MORE VULNERABLE TO ATTACK BUT IT REMOVES THE NEED FOR CABLING AND NETWORKS
   • THIS MEANS THAT IT CAN BE SET UP IN REMOTE LOCATIONS SUCH AS IN VEHICLES, IN PARKS OR ON PLANES ETC

3. ENCRYPTION

   • ENCRYPTION IS A METHOD OF SCRAMBLING DATA WITH A KEY CODE WHICH MAKES NO SENSE
   • ON A OPEN OR PUBLIC WIFI NETWORK ANOYONE CAN JOIN AND SNIFF OUT PACKETS OF DATA FROM OTHER USERS
   • THEREFORE ENCRYPTION IS USED. IF INTERCEPTED THE DATA WILL HAVE NO MEANING