Data Exchange

Data Exchange

1. Data Transmissions

   • Simplex- When data is only admitted in one direction.
     • e.g Your t.v remote.
   • Half Duplex-when two devise can communicate but only 1 at a time.
     • e.g a police radio.
   • Full Duplex- 2 friends can speak over the internet at the same time.
     • e.g Skype
   • BINARY CODE

2. CODEC

   • VOIP=Voice Over IP
   • When we talk all our voices are ANALOG
     • Our voices send ANALOG sound waves through the air.
   • COde and DECode

3. Parallell and Serial Transmissions

   • Serial transmission transmits 1 BIT at a time
   • Parallell transmission transmits 8 BITS at a time

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