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Authors:
James F. Kurose, Keith W. Ross
Chapter:
The Link Layer: Links,access Networks, And Lans
Exercise:
Review
Question:7 | ISBN:9780132856201 | Edition: 6

Question

Describe polling and token-passing protocols using the analogy of cocktail party interactions.

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Answer

Polling Protocol:

  • The polling protocol is a master node. It is used for eliminate collisions.
  • It is used to surveys each of the nodes and transfer certain maximum number of data frames.
  • If received message from the master node, then each node will ready to transfer data otherwise, master node sends message asking it to send its data.
  • One node completed successfully then start another transaction by using master node.
  • It is a round-robin fashion technique. The master node is used to polls each node in a cyclic manner.

Token Passing Protocol:

  • The Token passing protocol is not a master node.
  • It is used to transfer data in some fixed order.
  • If any node have the token the send its data. If it is not received destination node then search to go for next node and transfer it.
  • The main disadvantage is, if any node fails then entire transfer data will be crashed.
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