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Q1) Suppose nodes A and Bare on the same 10 Mbps Ethernet bus, and the propagation delay between the two nodes is 325 bit times. Suppose node A begins transmitting a frame and, before it finishes, node B begins transmitting a frame. Can A finish transmitting before it detects that B has transmitted? Why or why not? If the answer is yes, then A incorrectly believes that its frame was successfully transmitted without a collision. Hint: Suppose at time t = 0 bit times, A begins transmitting a frame. In the worst case, A transmits a minimum-sized frame of 512 + 64 bit times. So A would finish transmitting the frame at t = 512 + 64 bit times. Thus, the answer is no, if B 's signal reaches A before bit time t = 512 + 64 bits. In the worst case, when does B's signal reach A?
Packet switch receives a packet and determines outbound link to which packet should be forwarded. Determine the queuing delay for packet? Show work.
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Assume that sender sends silence suppressed RTP stream of G.711 audio to receiver. During talk spurt 20 msecs chunks of quantized audio samples are encapsulated. Determine number of samples are included in each packet?
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Assume that sender sends silence suppressed RTP stream of G.711 audio to receiver (G.711 is the name of standard for 64Kbps PCM). Outline algorithm which uses sequence numbers and time stamps of RTP packets to find out beginning of new talk spurt?
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