Computer science

Computer science

1. Networks

   • Hardware
     • Hub / switch
     • Nodes
     • Server
       • File server
       • Email server
   • WAN
     • Wide area network
       • Large geographical distance
   • LAN
     • Local area network
   • Topologies
     • Star
       • Nodes connected to central server
     • Mesh
       • Nodes connected
         • Data passes through
     • Bus
       • main cable
         • Each node connected
     • Ring
       • Data travels through nodes
         • One direction until destination
   • Security
     • Firewall
     • Encryption
     • Anti-Virus
     • Anti-Malware
   • IP address

2. Sound

   • Digital
     • When analogue sound is recorded
     • Takes samples of the amplitude of the sound
       • The more frequent the samples are, the higher quality the digital audio because it will be more like to the original, analogue sound wave
     • On a computer
   • Analouge