Answer: Option [B]
This site is dedicated to the aspirants of competitive exams SSC, UPSC, Railways, Postal Assistants, Bank, GATE and NET
Answer: Option [D]
FDDI MAC protocol uses three times. The token holding timer (determines duration for which a station can transmit after acquiring token). The Token rotation timer (is restarted every time the token is seen) and valid transmission timer (used to time out and recover from certain transient ring errors).