""PING""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I have follwoing questions:
>
> Q1: When all the ports are in BLOCKing mode at start on switch,
> how the initial broadcasts are then forwarded in a network so that
> switches can learn about each other via BPDUs?

It is blocking data traffic not protocol updates (BDPUs)

>
> Q2: When a switch breaks the collision domains, then what is the
> point of using Fragment Free method to avoid collisions?

Fragment Free tries it's best. Collisions can still occur. The difference
between the mothods is the amount of the packet that is read before it is
forwarded. If you want to have the best chance of never having a collision
use Store and Forward.

> /N




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