Quote:
Originally Posted by MrB
Close. 8MB/s = 64Mbit/s and 80Mbit/s = 10MB/s
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It depends on what you mean by bytes downloaded. You may not be counting encapsulation bytes.
Assume a maximum of 1500 bytes/frame (standard ethernet size not including the ethernet header which does not go down the wire).
ADSL requires 8 bytes/block for LLC/SNAP headers.
IP requires 20 bytes header per fragment.
TCP requires at least 20 header bytes/packet.
So at best you get 1500-8-20-20=1452 bytes of data/frame.
Roughly 1.3Km from the exchange my ADSL runs downstream at about 13Mb/sec, so 13e6*1452/1500=12.584e6 Mb/sec=1.573e6 MB/sec is in the ballpark for downloads from mirror.aarnet.edu.au