Question

Is it possible to simultaneously transmit with a basic ring topology?
In a basic ring topology can I have more than one token?
Is Active Monitor will remove tokens if I have more then one?
Can you give some useful link about it?

Answer 1

Well it depends on what kind of ring we are talking about. If the ring is able to use multiple wavelengths, such as a MultiTokenRing, then it can have one token per wavelength, and thus multiple nodes can transmit data at the same time.

For a simple ring, I think Wikipedia has a clear answer:

When no station is transmitting a data frame, a special token frame
circles the loop. This special token frame is repeated from station to
station until arriving at a station that needs to transmit data. When
a station needs to transmit data, it converts the token frame into a
data frame for transmission. Once the sending station receives its own
data frame, it converts the frame back into a token. If a transmission
error occurs and no token frame, or more than one, is present, a
special station referred to as the Active Monitor detects the problem
and removes and/or reinserts tokens as necessary (see Active and
standby monitors). On 4 Mbit/s Token Ring, only one token may
circulate; on 16 Mbit/s Token Ring, there may be multiple tokens.