[Info-vax] OS implementation languages
gah4
gah4 at u.washington.edu
Fri Sep 1 06:15:48 EDT 2023
On Friday, September 1, 2023 at 3:06:56 AM UTC-7, Bob Gezelter wrote:
(snip)
> The presence of switches, which are inherently store-and-forward at a packet
> level, change the analysis dramatically. For the record, I recall that there were
>10BaseT hubs, but the cost saving was not significant, so they are rare.
Early 10baseT devices were Ethernet repeaters. In the hub and spoke system,
they are the hubs, but technically they should be repeaters.
But yes, they are commonly called hubs.
> With care and careful design, one can get higher utilization, but that is a
> different story. For reference, look up Digital's CI, a higher performance
> CSMA/CD scheme, but with some twists to run at higher utilization percentages.
Ethernet does resolve collisions pretty fast, and often does get pretty high
utilization with usual traffic flows.
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