Answer: Option [B]
In Circuit switching it is necessary to have all channels in a message transmission path be of the same speed.
Answer: Option [B]
Fiber Distributed Data Interface is an example of Ring topology.
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Answer: Option [A]
Primary ring and secondary ring are the two fiber rings used in FDDI cabling.
Answer: Option [A]
FDDI access mechanism is similar to that of IEEE 802.5 which is a standard of Token ring network.
Answer: Option [C]
Frame relay is a wide area network topology and it uses connection oriented packet switching.
