a.
Explanation of Solution
The formula used for calculating the bandwidth-delay product is
The expression used for calculating the propagation delay in terms of meters (m) and seconds (s) is
Substitute, “20,000” for “m” and “2.5 ×108” for “s”
The propagation delay of the link is
b.
Explanation of Solution
The size of the file transmitted from Host A to Host B is 800,000 bits...
c.
Explanation of Solution
The formula used for calculating the width of a bit present on the link is as follows
The formula used for calculating the bandwidth-delay product is
The expression used for calculating the propagation delay in terms of meters (m) and seconds (s) is
Substitute, “20,000” for “m” and “2.5 ×108” for “s”
The propagation delay of the link is
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EBK COMPUTER NETWORKING
- suppose two hosts, A and B, are separated by 20,000 kilometers and are connected by a direct link of R = 2 Mbps. Suppose the propagation speed over the link is 2.5 x 108 meters/sec. Calculate the bandwidth-delay product, R x dprop. Consider sending a file of 800, 000 bits from Host A to Host B. Suppose the file is sent continuously as one large message. What is the maximum number of bits that will be in the link at any given time? Provide an interpretation of the bandwidth-delay product?arrow_forwardSuppose that there are three inter-media nodes between Host 1 and Host 2, and the transmission rate of each link is 4.096 Mbps. The time of end-to-end circuit established is 0.5 second. How much seconds does it take to send a file of 8.192M byte from host H1 to host H2 over a packet-switched network?arrow_forwardSuppose that we are sending a 30 Mb MP3 file from a source host to a destination host. All links in the path between source and destination have a transmission rate of 10 Mbps. Assume that the propagation speed is 2 × 108 meters/sec, and the distance between source and destination is 10,000 km. 1. Referring to the above question, how many bits will the source have transmitted when the first bit arrives at the destination? 2. Now suppose there are two links between source and destination, with one router connecting the two links. Each link is 5,000 km long. Again suppose the MP3 file is sent as one packet. Suppose there is no congestion, so that the packet is transmitted onto the second link as soon as the router receives the entire packet. What is the end-to-end delay?arrow_forward
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- 6. Delays. A user in Madagascar, connected to the internet via a 100 Mb/s (b-bits) connection retrieves a 250 KB (B-bytes) web page from a server in Tokyo, where the page references three images of 500 KB each. Assume that the one-way propagation delay is 82 ms and that the user's access link is the bandwidth bottleneck for this connection. a. Approximately how long does it take for the page (including images) to appear on the user's screen, assuming non-persistent HTTP using a single connection at a time? (For this part, you should ignore queueing delay and transmission delays at other links in the network) How long does it take if the connection uses persistent HTTP (single connection)? b. c. Suppose that user's access router has a 4 MB buffer (B-byte) on the link from the router to the user. How much delay does this buffer add during periods when the buffer is full? d. Assume a cache rate of 45% on the information received by the user in Madagascar from the Tokyo server. How does…arrow_forward1. Consider that two hosts A and B are connected via a direct link with transmission rate of 30 Mbps. Host A wants to send a file of 1 MB to Host B. The distance between Host A and Host B is 100 Km and the propagation speed over the link is 2*10 m/s. The processing delay at Host A is 20 us. A В a. What is the propagation delay over the link from Host A to Host B? b. What is the transmission delay if the file is sent as one large packet? с. What is the total time needed for the file to arrive to Host B?arrow_forwardA file of size 20 KiloBytes is transmitted to a destination over a 10 Megabit/s network link (1 Mega = 10^6, 1 Kilo = 10^3, 1 byte = 8 bits). The propagation delay to the destination is 40 milliseconds (1 milli = 10^−3). Assume the queueing delay encountered by packets of the file is negligible. What is the total delay (in milliseconds) for the file to get to its destination?arrow_forward
- Suppose you are designing a sliding window protocol for a 1-Mbps point-to-point link to a stationary satellite revolving around the earth at 3 x 104 km altitude. Assuming that each frame carries 1 KB of data, what is the minimum number of bits you need for the sequence number in the following cases? Assume the speed of light is 3 x 108 m/s. (a) RWS=1 (b) RWS=SWSarrow_forwardSuppose that R = 1 Gbps and Rc is 300 Mbps and Rs is 200 Mbps. Assuming that the servers are sending at their maximum rate possible, enter the link utilization of the shared link, whose rate is R, below. Enter your answer as a decimal, of the form 1.00 (if the utilization is 1, or 0.xx if the utilization is less than 1, rounded to the closest xx).arrow_forwardCalculate the total time (in milliseconds) required to send a file of size of 8000 Bytes. Assume one-way propagation delay of 40 milli second on a link with bandwidth of 0.8 x106 Bytes/second and a packet size of 1000 Bytes where data packets can be sent continuously with no packet loss.arrow_forward
- Operations Research : Applications and AlgorithmsComputer ScienceISBN:9780534380588Author:Wayne L. WinstonPublisher:Brooks ColeSystems ArchitectureComputer ScienceISBN:9781305080195Author:Stephen D. BurdPublisher:Cengage Learning