To Day and more to come: Mar 20, 2012

Tuesday, March 20, 2012

ISP going back to Bell bouncy speed

The following chart illustrates some typical network connections and how they contribute to the network "quality":

                          Bandwidth           Latency          Errors
                                             (one way)
  28.8 Analog Modem       3.0 KB/sec          120 ms           moderate
  28.8 No Compression     2.0 KB/sec           70 ms           high
  56K Analog Modem        5.0 KB/sec          100 ms           moderate
  ISDN Digital Modem      4-8 KB/sec           20 ms           low
  Direct Serial          10-115 KB/sec         20 ms           moderate
  Ethernet (0-1 hops)     2-12 MB/sec          <5 ms           low
  Ethernet (2-3 hops)     1-4 MB/sec          10-30 ms         low
  Ethernet (4-6 hops)    0.5-1 MB/sec         50-100 ms        moderate
  Ethernet (distant)      <200 KB/sec         >100 ms          mod-high

Remember that bandwidth is limited by the poorest link, but latency and network errors are cumulative. The values above are simply guidelines for "good" links -- a poor router or link may adversely affect one or more measures. The further data has to travel between hosts, the more traffic it must compete with and the more resources it uses.

The graft indicates fluctuating speed

Download Speed: 2390 kbps (298.8 KB/sec transfer rate)
Upload Speed: 614 kbps (76.8 KB/sec transfer rate)
March 20, 2012 3:34:02 PM