Consider the token ring network in Figure below. Token is circulating between st

Question

Consider the token ring network in Figure below. Token is circulating between stations in the following sequence: A->B->C->D->E->F->A. Single token operation is implemented and 8 priority levels supported, with level 0 the highest priority while level 7 is the lowest. The following data frames will be delivered by this network: Frame 1 from Node B, at priority level 4; Frame 2, from Node C, at priority level 2; Frame 3, from Node D, at priority level 1; Frame 4, from node F, at priority level 4. At the beginning, a free token with priority level 3 and reservation level 7 is released by node A. What is the sequence these four frames will be delivered? Justify your answer.

Explanation / Answer

based on priority level the frames were deliverd.

The frame 3 from node D having the high priority so it first delivers the frame 3

The node C delivers the frame 2 with priority of 2

node A free token with priority of 3

from B frame 1 delivered with priority 4

and finally frame is released from A with priority 7

sequence of delivery of frames:

3->2->1->2

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