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Recent questions tagged reference-book
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Patterson Chap 1 Q 23
23. Assume you wish to transfer an n B file along a path composed of the source, destination, 7 point-to-point links, and 5 switches. Suppose each link has a propagation delay of 2 ms and a bandwidth of 4 Mbps, and that the switches ... merits of circuits and packets is? Does it ignore important considerations that discredit one or the other approach? If so, what are they?
23. Assume you wish to transfer an n B file along a path composed ofthe source, destination, 7 point-to-point links, and 5 switches.Suppose each link has a propagation de...
Akash Kanase
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Akash Kanase
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32
Patterson Chap 1 Q 24
24. Consider a network with a ring topology, link bandwidths of 100 Mbps, and propagation speed 2 × 108 m/s. What would the circumference of the loop be to exactly contain one 1500-byte packet, assuming nodes do not introduce delay? What would the circumference be if there was a node every 100 m, and each node introduced 10 bits of delay?
24. Consider a network with a ring topology, link bandwidths of 100 Mbps, and propagation speed 2 × 108 m/s. What would the circumference of the loop be to exactly conta...
Akash Kanase
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Akash Kanase
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33
Patterson Cha 1 Q 22
22. Suppose that a certain communications protocol involves a per-packet overhead of 50 bytes for headers and framing. We send 1 million bytes of data using this protocol; however, one data byte is corrupted and the entire packet containing it is thus lost. Give ... number of overhead + loss bytes for packet data sizes of 1000, 10,000, and 20,000 bytes. Which size is optimal?
22. Suppose that a certain communications protocol involves aper-packet overhead of 50 bytes for headers and framing. Wesend 1 million bytes of data using this protocol; ...
Akash Kanase
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Akash Kanase
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34
Patterson Chap 1 Q 21
21. Suppose a host has a 1-MB file that is to be sent to another host. The file takes 1 second of CPU time to compress 50% or 2 seconds to compress 60%. (a) Calculate the bandwidth at which each compression option takes the same total compression + transmission time. (a) Explain why latency does not affect your answer.
21. Suppose a host has a 1-MB file that is to be sent to another host.The file takes 1 second of CPU time to compress 50% or 2 secondsto compress 60%.(a) Calculate the ba...
Akash Kanase
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Akash Kanase
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35
Patterson Chap 1 Q 19
19. Calculate the delay × bandwidth product for the following links. Use one-way delay, measured from first bit sent to first bit received. (a) 100-Mbps Ethernet with a delay of 10 µs. (b) 100-Mbps Ethernet with a single ... in geosynchronous orbit, 35,900 km high. The only delay is speed-of-light propagation delay from Earth to the satellite and back.
19. Calculate the delay × bandwidth product for the following links.Use one-way delay, measured from first bit sent to first bitreceived.(a) 100-Mbps Ethernet with ...
Akash Kanase
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Akash Kanase
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36
Patterson Chap 1 Q 18
18. Calculate the effective bandwidth for the following cases. For (a) and (b) assume there is a steady supply of data to send; for (c) simply calculate the average over 12 hours. (a) 100-Mbps Ethernet through three store-and-forward switches as in Exercise ... after sending each 12,000-bit data packet. (c) Overnight (12-hour) shipment of 100 DVDs that hold 4.7 GB each.
18. Calculate the effective bandwidth for the following cases. For (a) and (b) assume there is a steady supply of data to send; for (c) simply calculate the average over ...
Akash Kanase
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Akash Kanase
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37
Patterson Chap 1 Q 16
16. Calculate the latency (from first bit sent to last bit received) for the following: (a) 100-Mbps Ethernet with a single store-and-forward switch in the path and a packet size of 12,000 bits. Assume that each link introduces a ... implements “cutthrough” switching; it is able to begin retransmitting the packet after the first 200 bits have been received.
16. Calculate the latency (from first bit sent to last bit received) forthe following:(a) 100-Mbps Ethernet with a single store-and-forward switch inthe path and a packet...
Akash Kanase
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Akash Kanase
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Dec 15, 2015
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38
Patterson Chap 1 Q 15
15. For each of the following operations on a remote file server, discuss whether they are more likely to be delay sensitive or bandwidth sensitive: (a) Open a file. (b) Read the contents of a file. (c) List the contents of a directory. (d) Display the attributes of a file.
15. For each of the following operations on a remote file server, discuss whether they are more likely to be delay sensitive or bandwidth sensitive: (a) Open a file. (b) ...
Akash Kanase
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Akash Kanase
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39
Patterson Chapt 1 Foudnation Q 13
13. Suppose a 1-Gbps point-to-point link is being set up between the Earth and a new lunar colony. The distance from the moon to the Earth is approximately 385,000 km, and data travels over the link at the speed of light—3 ... What is the minimum amount of time that will elapse between when the request for the data goes out and the transfer is finished?
13. Suppose a 1-Gbps point-to-point link is being set up between the Earth and a new lunar colony. The distance from the moon to the Earth is approximately 385,000 km, an...
Akash Kanase
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Akash Kanase
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40
Peterson Chap 1 Q5
5. Consider a point-to-point link 4 km in length. At what bandwidth would propagation delay (at a speed of 2 × 108m/s) equal transmit delay for 100-byte packets? What about 512-byte packets?
5. Consider a point-to-point link 4 km in length. At what bandwidthwould propagation delay (at a speed of 2 × 108m/s) equal transmit delay for 100-byte packets? Wha...
Akash Kanase
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Akash Kanase
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Dec 14, 2015
Computer Networks
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41
point to point link to the moon
Suppose you are designing the sliding window protocol for a 1 Mbps point to point link to the moon, which has one way latency(delay) of 1.25 seconds. assuming that each frame carries 1 KB of data, What is minimum number of bits you need for sequence number?
Suppose you are designing the sliding window protocol for a 1 Mbps point to point link to the moon, which has one way latency(delay) of 1.25 seconds. assuming that each f...
Desert_Warrior
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Desert_Warrior
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Dec 13, 2015
Computer Networks
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