Re:Japan breaks world record for fastest internet speed
by zokier on Monday September 27, 2021 @05:04PM
(#28675981)
Any network engineers around? What leads comcast to offer such lopsided connectivity? I mean having some sort of asymmetry is normal and somewhat justified, but usually were talking something like 1:10 upstream:downstream. Here parent comment has fairly extreme 1:83 instead!? I imagine there must be some reasoning behind it, but I just can't figure what that would be.
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Re:Japan breaks world record for fastest internet speed
by ceph_ on Monday September 27, 2021 @07:45PM
(#28677553)
Someone can correct me if I'm wrong, but DOCSIS over coax isn't full duplex. It's multiplexing send and receive over the same wire. Since download bandwidth is more important they provision their network design to maximize the amount of downstream bandwidth available. They also have an extreme level of oversubscription.
Re:Japan breaks world record for fastest internet speed
by yinzer-solomon on Monday September 27, 2021 @07:42PM
(#28677530)
My understanding is that it’s not a technical issue, but rather a business and marketing one.
Comcast doesn’t want the home service to compete with their costlier Business service, so they artificially limit the upload speeds to prevent home/consumer users from serving a high volume of content using their less-expensive service.
Re:Japan breaks world record for fastest internet speed
by ksec on Tuesday September 28, 2021 @01:42AM
(#28679702)
The last mile DOCSIS bandwidth is shared among all of its user. So you want to maximise the download which is used 90% of the time. The problem is somewhat solved ( or lessen ) in DOCSIS 4.0 Full Duplex Extension. But as with everything DOCSIS the lead time to market is extremely long.