Assume pipelining and 20 packets can be sent without ACK, 100 Mbps link, 10 ms propagation delay, 10,000 bit packet. Calculate sender utilization.
ANSWER:
GIVEN THAT:
CALCULATING THE SENDER UTILIZATION:
1. Transmission delay (Tt) = length / bandwidth
= 10000/(100* 106)
= 0.0001 sec
= 0.1 ms
2. Propagation delay ( Tp) = 10 ms.
And number of packets(N) at a time given is 20.
Then a is (Tp/Tt) = 100
So, sender utilization / efficiency
= N / ( 1 + 2a)
= 20 / ( 1 + 2*100)
= 20/ 201
= 9.95 % efficiency
Assume pipelining and 20 packets can be sent without ACK, 100 Mbps link, 10 ms propagation...
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.
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)...
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....
Question 3 Link Utilization (15 points) For a Ikm wired link, the data rate is 12Mbits/s and an idle AQR scheme is adopted. 1) If packets are sent in the size of N 2048 bits, calculate the link utilization efficiency where P, 1.1 x 10 2) Assume chanel becomes better resulting in a P, 1 x 10-6. To keep the same link utilization, how can you adjust the data rate, Ri, while keeping the packet length, N, as the same...
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...
Assume a TCP sender is continuously sending 1,369-byte segment. If a TCP receiver advertises a window size of 7,001 bytes, and with a link transmission rate 34 Mbps an end-to-end propagation delay of 30.7 ms, what is the utilization? Assume no errors, no processing or queueing delay, and ACKs transmit instantly. Also assume the sender will not transmit a non-full segment. Give answer in percentages, rounded to one decimal place, without units (e.g. for an answer of 10.43% you would...
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...
Given three packets of size 1500 bytes each are ready inside Computer 1 to be transmitted onto Link 1. Computer 1 has zero processing delay. Assume each router has zero queuing and zero processing delay. Link 1 is a 10 Mbit/sec link and 5000 km long. Link 2 is 100 Mbits/sec and is 5000 km long. Link 3 is 1000 Mbits/sec and is 5000 km long. Propagation speed is 2 × 10 8 m/s. Assume a router has to receive...
Need help with this question urgently! If all questions could be answered that would be amazing, if only one or two that'd still be greatly appreciated.. Instruction: Use the free space propagation speed of light 3x10 m/s to calculate the propagation delay. For numerical calculations; result must show appropriate unit. Show complete solution of each problem in your submitted document 1. Consider a two hop network shown in figure 1. Node A sends data packets to the server via the...
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...