Bandwidth

Bandwidth

1. Network connection

   • Transferring bits (1s and 0s)
   • Network performance
     • How well network can transfer bits

2. Bandwidth and latency

   • Measurements to describe performance of a network connection

3. Bandwidth: measurement of capacity

   • Number of bits going through network in 1 second
     • Measured in bits per second (bps)
       • 1 Kbps=1,000 bits transmitted every second
       • 1 Mbps means 1,000,000 bits transmitted every second

4. Latency: measurement of delay

   • Time in milliseconds between a bit leaving one device and arriving at another
   • Measured in milliseconds (ms)

5. User experience

   • Need high bandwidth for streaming videos
     • YouTube
     • Or the video will keep pausing
       • Waiting for more bits to arrive
   • To get quick search results
     • Google
     • Bing
     • Yahoo
     • Need low latency network connection
   • Information travels both directions
     • Needs to arrive quickly
   • Best networks
     • High Bandwidth, low latency