Ugly Hedgehog - Photography Forum
Home Active Topics Newest Pictures Search Login Register
General Chit-Chat (non-photography talk)
internet speeds vs bandwidth
Page <prev 2 of 2
Jun 9, 2023 10:40:49   #
Schoee Loc: Europe
 
TriX wrote:
MB or GB of DATA/sec. would be a useful measurement. A benchmark usually consists of uploading or downloading various file sizes (a few larger files will typically yield a higher throughput than a plethora of small files) and reading the results. You could read packets/sec, but since each packet could contain a different amount of data, that’s not a representative measurement.

What we really want to know is how fast we can move a file or files from point A to point B. Example: you may have a 1Gb/sec pipe, but if it only moves real world data at 60 MB/sec (the theoretical max is 125MB/sec) due to latency, errors and retries, that’s what really matters.
MB or GB of DATA/sec. would be a useful measuremen... (show quote)


My Seinfeld episode downloaded in approx 2 secs was 114.8 MB. So about 57 MB of DATA per sec which is pretty close to theoretical max for up to 500 mbps link I think.

Reply
Jun 9, 2023 13:36:41   #
TriX Loc: Raleigh, NC
 
Schoee wrote:
My Seinfeld episode downloaded in approx 2 secs was 114.8 MB. So about 57 MB of DATA per sec which is pretty close to theoretical max for up to 500 mbps link I think.


Yep, about 90%. One advantage is that it’s a large file.

Reply
Jun 9, 2023 14:54:57   #
aphelps Loc: Central Ohio
 
BebuLamar wrote:
You said units/sec what do you mean? If a pipe is deliver 1gal/sec regardless of how big it is it's still 1gal/sec. So what kind of unit are you talking about?


The two pipes have the same speed but the larger pipe produces more volume. In my example, the speed of the water in both pipes is the same. This represents internet speed. The larger the pipe the more volume/sec can be produced. This is the bandwidth and represents the amount of data that can be moved per unit of time. If large amounts of data, info are demanded the internet speed must provide the power to move the data packets. If the volume demand increases the internet speed may slow down. I hope this clears things up.

Reply
 
 
Jun 9, 2023 15:38:55   #
BebuLamar
 
aphelps wrote:
The two pipes have the same speed but the larger pipe produces more volume. In my example, the speed of the water in both pipes is the same. This represents internet speed. The larger the pipe the more volume/sec can be produced. This is the bandwidth and represents the amount of data that can be moved per unit of time. If large amounts of data, info are demanded the internet speed must provide the power to move the data packets. If the volume demand increases the internet speed may slow down. I hope this clears things up.
The two pipes have the same speed but the larger p... (show quote)


What is the unit???? What unit to indicate the speed of the pipe??? If you say the pipe delive 1 gal/min then it's 1 gal/min regardless how big or small you get a gal every minute.

Reply
Jun 9, 2023 15:44:28   #
TriX Loc: Raleigh, NC
 
aphelps wrote:
The two pipes have the same speed but the larger pipe produces more volume. In my example, the speed of the water in both pipes is the same. This represents internet speed. The larger the pipe the more volume/sec can be produced. This is the bandwidth and represents the amount of data that can be moved per unit of time. If large amounts of data, info are demanded the internet speed must provide the power to move the data packets. If the volume demand increases the internet speed may slow down. I hope this clears things up.
The two pipes have the same speed but the larger p... (show quote)


I’m not sure about the the analogy. I think of it more like the pipe is the same size and the water pressure is constant, but there are valves in the pipe that limit the flow or divert it to different pipes. The concept of speed and BW being different is simple on its face, but the reasons can be quite complex. If you’re interested in delving into networking (and I am by no means a networking guru), I think understanding the OSI model provides a good framework for beginning: https://en.m.wikipedia.org/wiki/OSI_model



Reply
Page <prev 2 of 2
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.
General Chit-Chat (non-photography talk)
UglyHedgehog.com - Forum
Copyright 2011-2024 Ugly Hedgehog, Inc.