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The FDDI is based on which protocol?
Token bus
Ethernet
Electrical signal
Token ring
The FDDI protocol is based on the token ring protocol, and is a set of ANSI and ISO standards for data transmission on fiber optic lines in a local area network (LAN) that can extend in range up to 200 km (124 miles). First sentence is not worded correctly. It states that the "FDDI protocol is based on the token ring protocol" That is what the question asks.
*** Only if you read the next sentence ***
Although FDDI logical topology is a ring-based token network, it did not use the IEEE 802.5 token ring protocol as its basis; instead, its protocol was derived from the IEEE 802.4 token bus timed token protocol. In addition to covering large geographical areas, FDDI local area networks can support thousands of users. FDDI offers both a Dual-Attached Station (DAS), counter-rotating token ring topology and a Single-Attached Station (SAS), token bus passing ring topology.[1]
Added Token Bus as the new (correct) Alternative
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