1:02 PMQWhat is your question?BConsigerrtne two nOstS A aNaB are connected through adirect link. The bandwidth ofthe link is 10bits/sec,propagation speed is 2x10m/sec, the distance betweenA andB is 5000 km. What are thepropagation and transmissiondelays if the file size is20,000bytes.a) 1600 msec and 2.5 msecb) 1200 msec and 25 msecc) 1200 msec and 2.5 msecd) 1600 msec and 25 msecUSE THE APP

Given data:Bandwidth of the link = 10bits/sec.Propagation speed = 2x10 m/secDistance = 5000…

Answered: 1:02 PM QWhat is your question? B…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Segments are transmitted using GO-BACK-N ARQ over a link with RTT= 6 milliseconds with 17 Mbps transmission rate. The packet size is 3721 bytes and the window size is (static) 449. Assume there is no transmission errors and we always have data to send. Then, the link utilization is 66 x %. Note: provide a number greater without any signs.
10. For a 10 Mbps data link using 12,000-bit frames, and assuming that electrical signals propagate at 2.5 x 108 m/s: a. How long does it take to introduce a single frame onto the link? b. How long does it take for the trailing edge of the frame to travel 1,620 km? c. What is the total transmission time of this frame, from start to finish?
Consider a full-duplex 512 kbps link with length 36,000Km connecting two hosts. The data frames carry a useful payload of size 6000 bits. Assume that both ACK and data frames have 400 bits of header information, and that ACK frames carry no data. The propagation speed along this link is 3×108 m/sec. a) What is the RTT on this link? b) What is the effective useful data throughput, in kbps, when using Stop-and-Wait?
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…
m) Consider two hosts, A and B, connected by a single link of rate R = 56 kbps. Suppose the propagation speed along the link is 2.5 x 10° meters/sec. Host A is to send a packet of size L = 120 bits to host B. i) Suppose propagation delay dprop is twice of that of transmission delay dırans. Find dprop. ii) Calculate the bandwidth-delay product. i) Consider sending the packet of size L = 120 bits. What is the number of bits that will be in the link at any given time? Consider sending a packet of size L = 250 bits. What is the number of bits that will be in the link at any given time? iv)
Using Direct Sequence Spread Spectrum, if the data message is 4 bits and the generated bit stream is 16 bits, the transmitted message over the link will be: O4 bits O 8 bits O 64 bits O 16 bits
We have a 4 km down CSMA / CD channel with a capacity of 10 Mbps. Assume the average negotiablelength of interval is 2 ∗ ∆ and that the propagation rate is 2 ∗ 10^8 m/s, the length of frames that are transmitted is 50B. What is the efficiency of the network? The result should be rounded to 3 decimal places.
Can I have the solution for this question, in a step by step form to help my understanding. Thank you
5. A wireless Base Station (BS) is serving N users with a single channel having a capacity C bits/second. The BS has two options for serving the users a) Option1: BS divides the channel into multiple sub-channels using FDMA and assigns a dedicated sub-channel to each user and process his traffic in a separate buffer. b) Option2: BS put the traffic from all users in one buffer and transmits all traffic packet- by-packet on the same channel in a first-come-first serve order 1 Compute the transmission time of each packet (on the air) for Option1 and Option2 if the packet size is L bits.
H1.
2. Host A wants to send a large file to Host B. The Path from Host A to Host B has three sequential link rates, R1 = 200 kbps, R2 = 2Mbps & R3 = 1 Mbps. a. What is the Throughput rate for the file transfer assuming there is no other traffic in the network? b. How long will it take to transfer the file (4 million bytes) to host B? c. c) Repeat (a) and (b) with R2 = 100 kbps?
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)b.) Assume a cache rate of 45% on the information received by the user in Madagascar from the Tokyo server. How does this affect your answer in a? Show your work.

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