chapter 5

chapter 5

1. protocalls

   • set of rules that govern data transmission.
   • protocols have a physically and logically based parts.
   • checking that the data being sent back and forth is correct is as part of protocols. using check sums, echoing and parity checks.

2. circuit/packet switching

   • packets
     • data split up is called packets.
   • packet switching
   • circuit switching

3. data transmission

   • Parrallel Transmission
   • WAN
     • wide area network between lots of terminals.
   • LAN
     • local area network between a few terminals
   • simplex
   • NIC
   • serial transmissions
   • echoing back
   • streaming
   • parity check
   • bit-rate
   • baud
   • checksum
     • i.e. bar codes, on the end of the digits under the bar code there will be numbers and on the end is the sum of the before hand numbers and this is checked at both side of transmission of sum is same.
   • half-duplex
   • duplex