cnp3-ebook/exercises/ex-sharing

Exit Zen

34 ../../exercises/ex-sharing.rst:630
	English Hosts `A` and `B` use the simple congestion control scheme described in the book and router `R1` uses the DECBIT mechanism to mark packets as soon as its buffers contain one packet. Hosts `A` and `B` need to send five segments and start exactly at the same time. How long does each hosts needs to wait to receive the acknowledgment for its fifth segment ?
	Czech 0/3550 · 355 Needs editing
35 ../../exercises/ex-sharing.rst:633
	English Discussion questions
	Czech 0/200 · 20 Needs editing
36 ../../exercises/ex-sharing.rst:639
	English In a deployed CSMA/CD network, would it be possible to increase or decrease the duration of the slotTime ? Justify your answer
	Czech 0/1260 · 126 Needs editing
37 ../../exercises/ex-sharing.rst:641
	English Consider a CSMA/CD network that contains hosts that generate frames at a regular rate. When the transmission rate increases, the amount of collisions increases. For a given network load, measured in bits/sec, would the number of collisions be smaller, equal or larger with short frames than with long frames ?
	Czech 0/3090 · 309 Needs editing
38 ../../exercises/ex-sharing.rst:643
	English Slotted ALOHA improves the performance of ALOHA by dividing the time in slots. However, this basic idea raises two interested questions. First how would you enforce the duration of these slots ? Second, should a slot include the time to transmit a data frame or the time to transmit a data frame and the corresponding acknowledgment ?
	Czech 0/3340 · 334 Needs editing
39 ../../exercises/ex-sharing.rst:645
	English Like ALOHA, CSMA relies on acknowledgments to detect where a frame has been correctly received. When a host senses an idle channel, if should transmit its frame immediately. How should it react if it detects that another host is already transmitting ? Consider two options :
	Czech 0/2740 · 274 Needs editing
40 ../../exercises/ex-sharing.rst:647
	English the host continues to listen until the communication channel becomes free. It transmits as soon as the communication channel becomes free.
	Czech 0/1380 · 138 Needs editing
41 ../../exercises/ex-sharing.rst:648
	English the host stops to listen and waits for a random time before sensing again the communication channel to check whether it is free.
	Czech 0/1280 · 128 Needs editing
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