CITS3002 Computer Networks  
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Discussion question 1

Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. Andrew Tanenbaum - "Computer Networks" 3rd ed., p83

Order the bandwidths of the following "communication technologies", and the times taken to perform each transfer:

  • Australia Post delivering a movie on DVD overnight (olde NetFlix),
  • transferring a large 100MB file over the UWA wireless network,
  • copying the same 100MB file from a hard disk drive (HDD) to the same disk,
  • copying the same 100MB file to a USB drive,
  • copying one 1MB array to another in a high-level programming language,
  • refreshing the screen of an ASCII terminal using a 56Kbps modem,
  • transmitting an A4-sized FAX in 30 seconds, and
  • transmitting data across a Bluetooth network.

In each case state your assumptions about the amount of data transfered.

 

... or 3.5Mbps over a piece of wet string (2017).

CITS3002 Computer Networks, Lecture 2, The Physical Layer, Errors detection and correction, p4, 6th March 2024.