Clarification from "Network Diagnostic Tool (NDT)" sites "Details" please!

ratchet · Post by **ratchet** » Sat Feb 26, 2011 8:44 am

"PC/workstation has a 501.0 KByte buffer which limits the throughput to 11.32 Mbps
The network based flow control limits the throughput to 12.77 Mbps" Although at this time, this question is basically a moot point since my ISP speed is limited to 10 Mbps, I'd like to know if our provider provides us with greater speeds can these limitations (and exactly what are they?) be tweaked?
Windows XP SP3, Pent 4! Thank you!

mccoffee · Post by **mccoffee** » Sat Feb 26, 2011 10:32 am

There is usually a theroitical speed and actual speed.. It's not uncommon for isps to provide slighly more than adervertised ,but to get the full 12 is more then unlikely aslong as you are at 80-90% of advertised speed your doing pretty good..

ratchet · Post by **ratchet** » Sat Feb 26, 2011 6:20 pm

mccoffee wrote:There is usually a theroitical speed and actual speed.. It's not uncommon for isps to provide slighly more than adervertised ,but to get the full 12 is more then unlikely aslong as you are at 80-90% of advertised speed your doing pretty good..

So are you saying "The network based flow control limits the throughput to 12.77 Mbps" refers to my ISP as opposed to my router? So what does "PC/workstation has a 501.0 KByte buffer which limits the throughput to 11.32 Mbps" refer to? Thank you!

trogers · Post by **trogers** » Sat Feb 26, 2011 9:05 pm

ratchet wrote:
So what does "PC/workstation has a 501.0 KByte buffer which limits the throughput to 11.32 Mbps" refer to? Thank you!

This means that the TCP Window of your comp has been set to 501 KB which allows a max speed of 11.32 mbps.

Buffer = TCP Window = Rwin.

ratchet · Post by **ratchet** » Sat Feb 26, 2011 10:09 pm

trogers wrote:This means that the TCP Window of your comp has been set to 501 KB which allows a max speed of 11.32 mbps.

Buffer = TCP Window = Rwin.

Understand and thank you!