Problem 2. Sender Utilization (20 pt.) Assume stop-and-wait, 100 Mbps link, 10 ms propagation delay, 10,000...
Problem 2. Sender Utilization (20 pt.)
- Assume stop-and-wait, 100 Mbps link, 10 ms propagation delay, 10,000 bit packet. Calculate sender utilization.
- Assume pipelining and 20 packets can be sent without ACK, 100 Mbps link, 10 ms propagation delay, 10,000 bit packet. Calculate sender utilization.
Homework Answers
a)
Given that Bandwidth = 100 Mbps, Propagation delay(Tp) = 10 ms and packet length = 10000 bits
Transmission time(Tt) = packet length/Bandwidth = ( 10, 000)/(100 * 10^6) = 0.0001 seconds = 0.1 ms
So, sender utilization = Tt/(Tt + 2Tp) = 0.1/(0.1 + 2*10) = 0.1/20.1 = 0.49 % utilization
b)
Given that 20 packets (N) can be sent without ACK using pipeling. Therefore, N*Tt time for transmitting N packets.
So, the sender utilization is (N*Tt)/(Tt + 2*Tp) = (20*0.1)/20.1 = 9.95 % utilization.
Add Answer to:
Problem 2. Sender Utilization
(20 pt.)
Assume stop-and-wait, 100 Mbps link, 10 ms propagation delay,
10,000...
Assume pipelining and 20 packets can be sent without ACK, 100 Mbps link, 10 ms propagation...
Assume pipelining and 20 packets can be sent without ACK, 100 Mbps link, 10 ms propagation delay, 10,000 bit packet. Calculate sender utilization.
11. Suppose the bandwidth on a point-to-point link is 1 Mbps and the round-trip delay is...
11. Suppose the bandwidth on a point-to-point link is 1 Mbps and the round-trip delay is 19 milliseconds. Assume that the size of each packet is 1000 bits. Also assume that the size of ACK packet is negligible. Answer each of the following for both go-back-n and selective-repeat schemes. Assume that the sender always has data for transmission. (10 points) (a) Assuming that the link is error-free, what should be the minimum window size to achieve at least 75% utilization....
Questions: 1. (15pt.) Suppose that a file of 10 bytes is transferred between two hosts, and packet size is 10 bytes. Assume packets are sent back-to-back with no overhead of encapsulation. Calcula...
Questions: 1. (15pt.) Suppose that a file of 10 bytes is transferred between two hosts, and packet size is 10 bytes. Assume packets are sent back-to-back with no overhead of encapsulation. Calculate the file transmission latency (from first bit sent to last bit received) for (a) Single store-and-forward 1-Gbps switch is in the path, each link introduces a propagation delay of lus, and either queucing or processing delay can be omitted (b) Same as (a) but with three switches; (e)...
3. Suppose there is exactly one packet switch (or router) between a sending host and a...
3. Suppose there is exactly one packet switch (or router) between a sending host and a receiving host. The transmission rates between the sending host and the switch and between the switch and the receiving host are R1 = 1Mbps and R2 = 2Mbps, respectively. Assuming that the switch uses store-and-forward packet switching, what is the total end-to-end delay to send a packet of length 18000bits? Assume that the propagation speed is 2 * 108 meters/sec, the distance between source...
A company has a dedicated link of 100 Mbps. Each employee, when online, transmits continuously at...
A company has a dedicated link of 100 Mbps. Each employee, when online, transmits continuously at 12 Mbps when active, but each user is active only 20 percent of the time. Assume packet switching is used. (a) What is the probability that more than 2 users are transmitting at the same time? (b) Suppose that the system will drop any packets if it's utilized at 100% capacity without queuing them. If we need to guarantee a probability of at most...
A company has a dedicated link of 100 Mbps. Each employee, when online, transmits continuously at...
A company has a dedicated link of 100 Mbps. Each employee, when online, transmits continuously at 12 Mbps when active, but each user is active only 20 percent of the time. How many users can the link support when circuit switching is used? For the remainder of this problem, suppose packet switching is used. What is the probability that more than 2 users are transmitting at the same time? Now suppose that the system will drop any packets if it...
1. (1 pt) Under what conditions would an open-loop protocol such as an error-correcting Hamming code...
1. (1 pt) Under what conditions would an open-loop protocol such as an error-correcting Hamming code be preferable to the feedback type protocols discussed in Chapter 3? 2. (1 pt) Suppose that a stop-and-wait protocol was used on a channel has a 300 millisecond propagation delay and sender frames sizes of 100 milliseconds. The receiver must fully receive the frame before sending an acknowledgment. The size of the acknowledgment can be ignored. What is the channel utilization? 3. (1 pt)...
Question#1 1. What is the difference between a BSS and an ESS? 2. Discuss the three...
Question#1 1. What is the difference between a BSS and an ESS? 2. Discuss the three types of mobility in a wireless LAN. Question#2 A network using CSMA/CD has a bandwidth of 10 Mbps. If the maximum propagation time (Including the delays in the devices and ignoring the time needed to send a jamming signal, as we see later) is 25.611US, what is the minimum size of the frame? Question#3 Assume that, in a Stop-and-Wait ARQ system, the bandwidth of...
Tig. 1 2. Consider the scenario shown below where (from the bottom up), you notice three...
Tig. 1 2. Consider the scenario shown below where (from the bottom up), you notice three hosts and a local logging server (that stores information that is sent to it) are connected to a router and to each other by a 100 Mbps link, with a near-zero ms propagation delay. That router in turn is connected to another router over a 30 Mbps link with a 50 ms propagation delay, and that latter router is connected to two remote logging...
help with computer network questions 1. What is the difference between circuit switching and packet switching?...
help with computer network questions 1. What is the difference between circuit switching and packet switching? 2. What are the different layers in today’s Internet? Why do we create layers? 3. Suppose there is a 10 Mbps microwave link between a geostationary satellite and its base station on Earth. Every minute the satellite takes a digital photo and sends it to the base station. Assume a propagation speed of 2.4 * 10^8 meters/sec. a. What is the propagation delay of...
11. Suppose the bandwidth on a point-to-point link is 1 Mbps and the round-trip delay is 19 milliseconds. Assume that the size of each packet is 1000 bits. Also assume that the size of ACK packet is negligible. Answer each of the following for both go-back-n and selective-repeat schemes. Assume that the sender always has data for transmission. (10 points) (a) Assuming that the link is error-free, what should be the minimum window size to achieve at least 75% utilization....
Questions: 1. (15pt.) Suppose that a file of 10 bytes is transferred between two hosts, and packet size is 10 bytes. Assume packets are sent back-to-back with no overhead of encapsulation. Calculate the file transmission latency (from first bit sent to last bit received) for (a) Single store-and-forward 1-Gbps switch is in the path, each link introduces a propagation delay of lus, and either queucing or processing delay can be omitted (b) Same as (a) but with three switches; (e)...
1. (1 pt) Under what conditions would an open-loop protocol such as an error-correcting Hamming code be preferable to the feedback type protocols discussed in Chapter 3? 2. (1 pt) Suppose that a stop-and-wait protocol was used on a channel has a 300 millisecond propagation delay and sender frames sizes of 100 milliseconds. The receiver must fully receive the frame before sending an acknowledgment. The size of the acknowledgment can be ignored. What is the channel utilization? 3. (1 pt)...
Tig. 1 2. Consider the scenario shown below where (from the bottom up), you notice three hosts and a local logging server (that stores information that is sent to it) are connected to a router and to each other by a 100 Mbps link, with a near-zero ms propagation delay. That router in turn is connected to another router over a 30 Mbps link with a 50 ms propagation delay, and that latter router is connected to two remote logging...
Most questions answered within 3 hours.
-
2. Balance sheet
The balance sheet provides a snapshot of the financial condition
of a company....
asked 8 minutes ago -
In week 1 of the chemical equilibrium experiment, you and your
lab team will create a...
asked 40 minutes ago -
Identify and describe five (5) characteristics of a good KM
measurement system. Be sure to include...
asked 44 minutes ago -
What are at least five (5) workplace wellness best practices for
a successful wellness program? Explain...
asked 39 minutes ago -
A pharmaceutical company is testing a new drug. Of the 110
people that received the drug,...
asked 1 hour ago -
Which of the following is NOT a mechanism for gene
regulation?
a. Phase variation in DNA....
asked 1 hour ago -
Which of the following is being applied when, under certain
conditions, the value recorded for an...
asked 1 hour ago -
Describe the role of the three components of connective
tissue. In what ways does a connective...
asked 1 hour ago -
Excel spreadsheet
I am clueless when it comes to excel. I need to make a
spreadsheet...
asked 1 hour ago -
1. A beta-emitter would be safely stored by all of the following
except
a. wrapped in...
asked 1 hour ago -
In the laboratory a student combines 29.2 mL of
a 0.122 M aluminum
bromidesolution with 19.6...
asked 1 hour ago -
What is the Br∅nsted-Lowry base reactant in the following
chemical reactio:
C5H5N(aq) + H2O(l) ⇌ C5H5NH+(aq)+OH-(aq)?...
asked 1 hour ago