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Module 2: Data Link Layer & MAC Sublayer

20232m

Which channel access method is used in IEEE 802.5 networks?
(i) CSMA/CD
(ii) Token bus
(iii) Token ring
(iv) All of these

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Answer: (iii) Token ring

IEEE 802.5 defines the Token Ring LAN. A special frame called a token circulates around the ring, and only the station holding the token may transmit. This gives collision-free, deterministic access.

CSMA/CD belongs to IEEE 802.3 (Ethernet) and token bus to IEEE 802.4.

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