How a token ring networks allows sharing of bandwidth, Computer Networking

Question:

(a) Explain how a Token Ring networks allows sharing of bandwidth (access control).

(b) (i) CSMA/CD is not appropriate for wireless communication. Explain why.

(ii) Multiple Access with Collision Avoidance (MACA) is typically used for wireless Local area networks. With the help of a diagram describe how MACA works efficiently for wireless networks.

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