Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Suppose A and B nodes are on the same 10 Mbps broadcast and the propagation delay is 325 bit times between the two nodes. Suppose for this channel CSMA/CD and Ethernet packets are used. Suppose node A begins sends a frame and node B starts sending a frame until it is over. Can Afinish
transmitting B until it is detected? Why not? Why or why not? If so, then A incorrectly insists that his frame was transmitted safely without a crash. Hint: Suppose t = 0 bits at the moment, A begins sends the frame. In the worst case, a minimum frame of 512 + 64 bit times is transmitted. So A would end the frame at t = 512 + 64 bit times. The . response is no, if the signal B crosses t = 512 + 64 bits before bit time. In the worst scenario, when does B hit A?
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- Computer A is sending a 10 MByte long file to Computer B via packet-switching over two consecutive 100 Mbps links of 2000 km length each.Assume that the signal propagation speed on both links is 2 x 108 m/s.Furthermore, assume that the maximum length of a packet is 1480 bytes and that Computer A fills each packet to the max, if possible. How long (in seconds) does it take Computer A to send out one packet of maximum length on the first link?arrow_forwardComputer A is sending a 100 kByte long file to Computer B via packet-switching over two consecutive 10 Mbps links of 1000 km length each.Assume that the signal propagation speed on both links is 2.5 x 108 m/s.Furthermore, assume that the maximum length of a packet is 1500 bytes and that Computer A fills each packet to the max, if possible. How "long" (in meters) is one bit on link 1?arrow_forwardComputer A is sending a 10 MByte long file to Computer B via packet-switching over two consecutive 100 Mbps links of 2000 km length each.Assume that the signal propagation speed on both links is 2 x 108 m/s.Furthermore, assume that the maximum length of a packet is 1480 bytes and that Computer A fills each packet to the max, if possible. How many bytes will be contained in the last packet?arrow_forward
- Consider a router that transmits bits onto a transmission medium at the rate of 2 Mbps. Let the link be 3 km in length, and bits propagate through the transmission medium at the speed of (approximately) 3x10^8 meters/sec. What is the transmission delay in seconds to transmit a packet of size 2,0o0 bits onto the link? a. 1x10^-5 seconds O b. .001 seconds с. 1 second d. -4 secondsarrow_forwardComputer A is sending a 100 kByte long file to Computer B via packet-switching over two consecutive 10 Mbps links of 1000 km length each.Assume that the signal propagation speed on both links is 2.5 x 108 m/s.Furthermore, assume that the maximum length of a packet is 1500 bytes and that Computer A fills each packet to the max, if possible. How many bytes will be contained in the last packet?arrow_forwardIn this problem you will be doing some elementary calculations oftransmission and propagation delays.Consider two hosts, A and B that are connected by a transmissions link of2.1 Mbps. Assume that packets are of length 2.0 Kb (Kilobits) and thelength of the link is 100Km. a). Now suppose that node C is connected to node B also by a 2 Mbps, 100Km link. How long does it take from when the first bit is transmitted by Ato when the last bit is received at C, assuming B operates in a store-andforward manner?arrow_forward
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