Internet Speeds Question

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CmdrJeffSinclair

CmdrJeffSinclair

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Aug 29, 2014
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So I'm not a noob but I admit I am a little confused about internet "speed" variables and the cable modem I want to buy.

1) The Comcast internet I want says "Internet up to 105Mbps" for $44/month....what does this even mean?

2) Which is based on the confusion of #1, is there a real distinction between "download speed" and surfing speed.
a. I already realize that surfing speeds have a million variables regarding the many servers and sites and download speed caps (etc), however...
3) If my Comcast says 105Mbps does that mean if my cable modem allows for 1000Mbps that literally 9/10ths of the modem's potential speed is just wasted? Or will surfing speeds be helped but download speeds be limited to ~105Mbps since that is the limit Comcast has set for that plan?

Thanks guys. Don't go overboard on explaining since I understand a lot but there seems to be no real answer to some subtle differences in "speed."

 
Solution
B
105m is likely some magic marketing number. You would have to look in the cable modem while it was connected and you could see how many channels and the encoding on them. This is all based on the docsis protocol which you can search if you want all the nasty details.

The largest issue is whatever the value is it is shared by you and all your neighbors. Everyone data is all mixed together you just can't see anyone else but your own but it actually does enter your modem in most cable installations.

The 1g speeds are only related to the lan side. The traffic does run at 1g between your PC and the router. It is then places in a buffer and transferred at the slower speeds by docsis. The buffers are fairly large so you do not...
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bill001g

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Aug 9, 2012
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105m is likely some magic marketing number. You would have to look in the cable modem while it was connected and you could see how many channels and the encoding on them. This is all based on the docsis protocol which you can search if you want all the nasty details.

The largest issue is whatever the value is it is shared by you and all your neighbors. Everyone data is all mixed together you just can't see anyone else but your own but it actually does enter your modem in most cable installations.

The 1g speeds are only related to the lan side. The traffic does run at 1g between your PC and the router. It is then places in a buffer and transferred at the slower speeds by docsis. The buffers are fairly large so you do not notice but if you had a app that would send traffic for too long it would exceed this buffer and drop your traffic.

Really the only use for gig ports on most routers is for traffic between devices inside your house. Lan-lan puts almost no burden on the router so it can easily run multiple ports at 1g speeds talking to each other.
 
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CmdrJeffSinclair

CmdrJeffSinclair

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Aug 29, 2014
785
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what a freaking awesome explanation. Wow. Everything makes sense now. Those bozos doing the marketing are all selling this stuff knowing that most of us have no idea so we pick the bigger number and think it's better
 
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