Someone on another thread posted the following and had an "Engineer" who obviously had no idea about networking "helping" him.
I've just got 100mb internet in the flat but was only getting speeds of 70mb. As it turns out (an engineer had to call) my ethernet cable (supposedly 5e) just wasn't up to scratch. It's a 50m cable running into the desktop in the office. I was under the impression that cat5e was capable enough for gigabit speeds so it's probably just a rubbish cable.
I saw this cable here and was wondering if anyone knows whether it would be good enough for my needs.
If you notice, they always say, "Up to xy Mb". The Mb should stand for "Mebibit" (Mega Binary Bit) which is 2^20 - as opposed to a Megabit which would be 10^6 which is what the misleading swine use in advertising (2^20 = 1,048,576 whereas 10^6 = 1,000,000).
Now lets just assume that the provider was lying and instead of them using the proper units for the transmission of data i.e. Mebibits they used Megabits then instead of 100 Mb (Megabits) it would really be 95.3 Mb (Mebibits). Now although eight bits make a byte, lets add in a transportation overhead and say in that case ten bits make a byte. We divide the 95.3 by ten and then multiply by eight and one gets 76.24 Mb (Mebibit) which you can expect as a maximum.
So with measured 70 Mb (Mebibits) you are not doing too badly with regard to the maximum.
You see anything measuring your network speed would be working in Mebibits, but the markedroids and salescritters that write the "Up to xy Mb speeds" tell you porkies to the tune of about 5% from the outset by misleadingly using Megabits which should never be used in connection with data transmission rates.
I'm surprised the "Engineer" that called round couldn't have told you all of this, that is just basic networking.