The giveaway indicator is that vectoring trials are underway using 17a.

If 30a was about to be deployed why test vectoring on 17a in a public trial?

The Internet rumour machine is great, but sometimes people need to spend time reading more than just the rumours.

In reply to a post by kwikbreaks:

Is the "TBB test" UDP? I'm not that clued up on this stuff but assume there may be less collisions with UDP and that's why it's faster.

Less collisions?

UDP is faster because it doesn't care about packet loss or flow control, and also has less overhead in the actual frame than TCP.

Collisions happen at layer 1, physical, when a simplex connection has two transceivers transmitting simultaneously hence no usable message is received by the devices sharing that layer 1 network. UDP and TCP operate on layer 4, transport, hence make no difference to collision count. Errors can only propagate up the stack as they are encapsulated on the way down.

The TBB test is TCP. Port 8095 for single thread test, port 80 for 6 thread HTTP.

TCP port 8095 and a single thread

Collisions on the internal ethernet connection - sending an ACK could cause a collision with an incoming packet requiring a re-transmit and making the measured speed lower. If no ACK transmissions are required as in UDP there will be no collisions from that particular connection but I'm guessing other random connections may still cause some.

Switched Ethernet is almost invariably full duplex, meaning the connection can send and receive simultaneously. This makes collisions between a sent and a received packet impossible.

Unless connecting through a hub the Ethernet connection is almost certainly full duplex and uses different wires in each direction.

The same cannot be said for WiFi, however.

Edited by deleted (Fri 15-Nov-13 17:57:33)

tell us the browser/os/flash version we can try to reproduce it and maybe find a solution or a reason for the issue

So a 100Mbps connector could deliver the full 100 regardless of protocol. Fair enough. I admitted up front I wasn't all that clued up on this stuff - when I learned about ethernet it was the old coax type . It looks like some other explanation is needed then - maybe MrS's doubts over Flash etc.