Consider the following network with given line speeds and lengths: Assume the speed of light is 2×10^8 m/s, and that the processing and queuing delays are negligible. Node A sends a 1400-byte frame to node C through node B. Suppose Node A starts sending the first bit of the frame at t=0. Answer the following questions: a. At what time (t=?) node B receives the frame in full (i.e. the last bit)? b. After node B receives the frame in full, then it will start sending the frame to node C. Determine the time (t=?) when node C receives the frame in full. c. Suppose at this time node C sends a small acknowledgment back to node A. The transmission time for the acknowledgment is negligible. Calculate at what times (t=?) the acknowledgment arrives at nodes B and A.
Consider the following network with given line speeds and lengths:
Assume the speed of light is 2×10^8 m/s, and that the processing and queuing delays are negligible.
Node A sends a 1400-byte frame to node C through node B. Suppose Node A starts sending the first bit of the frame at t=0. Answer the following questions:
a. At what time (t=?) node B receives the frame in full (i.e. the last bit)?
b. After node B receives the frame in full, then it will start sending the frame to node C. Determine the time (t=?) when node C receives the frame in full.
c. Suppose at this time node C sends a small acknowledgment back to node A. The transmission time for the acknowledgment is negligible. Calculate at what times (t=?) the acknowledgment arrives at nodes B and A.
d. Assume after sending its frame, node A wait for the acknowledgment back from node C before sending the next frame. What is the average throughput (number of transmitted bits per second) of the data flow from node A to node C?
NOTE: Transmission and Propagation times MUST be calculated for each network link and are cumulative.
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