User login

Poll

Window manager/desktop favorit?
KDE
10%
Gnome
45%
XFCE
30%
Enlightenment
0%
Blackbox, Fluxbox
15%
Windowmaker
0%
Altceva
0%
Total votes: 20

Partners

[banner]

[banner]

[banner]

Intrebare de retele - autonegociate speed

Se aplica la orice sistem de operare intrebarea:

TOTUL IPOTETIC:
* se da un switch 10/100.
* se dau 5 calculatoare cu interfete de retea DIFERITE setate pe autonegociere
* 4 din cele cinci au placi capabila 10/100
* al 5-lea are placa retea 10Mbps

E clar ce se itampla daca conectez pe primele 4 la switch: va merge cu 100Mbps (full duplex probabil).

Ce se intampla cu reteaua cand conectez calc. nr.5?

1. autonegocierea creaza un fall-back la 10Mbps pt tot ce e legat la switch?

2. switchul se descurca cu flow-ul de date intre calculatoarele de 100 si cel de 10Mbps?

3. altceva?

Intrebare de retele - autonegociate speed

Quote:
Consider the scenario where two machines X and Y are connected to a switch at 100 Mbps while a third machine Z is connected to the same switch at 10 Mbps. X can send TCP traffic to Y at 100 Mbps since the switch sees no congestion delivering data to Y's switch port. But if X starts sending multicast, the switch tries to forward the multicast to Z's switch port as well as to Y's. Since Z is limited to 10 Mbps, the switch senses congestion and prevents X from sending faster than 10 Mbps.

http://www.29west.com/docs/THPM/thpm.html#ETHERNET-FLOW-CONTROL