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- Consider two hosts S and R connected directly by a link. A link has a transmission speed of 107 bits/sec. It uses data packets of size 400 bytes. Data needed to transmitted is 400 bytes. Length of the link is 600 km and the propagation speed are 3 × 108 meter per second. T is the transmission delay and P is the propagation delay. The propagation delay in millisecond and transmission delay in microsecond respectively areConsider 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 the length of the link is 100Km. a. What is the propagation delay from A to B, that is the amount of time from when the first bit of the packet is transmitted at A, until it is received at B? b. What is the transmission time of the packet at A (the time from when the first bit of the packet is sent into the wire and the time at which the last bit is sent into the wire). c. Suppose now that that length of the link is doubled. What is the propagation delay from A to B now and what is the transmission time? d. Now suppose that node C is connected to node B also by a 2 Mbps, 100 Km link. How long does it take from when the first bit is transmitted by A to when the last bit is received at C, assuming B operates in a store-and -forward manner?The distance from Earth to Mars is about 90 * 106 meters in the best case. Assume there is a link between Earth and Mars with a transmission rate of 2Mb/s. We need to send a packet from Earth to Mars over this link, and the packet has a length of 20000 bits. (Recall: light speed is 300,000,000 meters/sec) 1. What's the transmit delay? 2. What's the propagation delay? 3. Ignore queuing and processing delay, what's the end to end delay?
- What are the propagation time and the transmission time for a 5-MB (megabyte) message (an image) if the bandwidth of the network is 1 Mbps? Assume that the distance between the sender and the receiver is 12,000 km and each word requires 8-bit with light travels at 2.4 * 108 m/sConsider sending real-time data from Host A to Host B over a packet-switched network. Host A takes an 8-bit measurement every millisecond, and Host A collects these into 64-byte packets. There is one link between Hosts A and B; its transmission rate is 5 Mbps, its propagation delay is 2 × 108 meters/sec, and its length is 3 km. As soon as Host A gathers a packet, it sends the packet to Host B. How much time elapses from the time that Host A begins to take the first measurement in a packet until the entire packet reaches Host B?Consider a packet that consists of 1000 bytes, including any headers. How long does it take to transmit this packet onto a data link if the transmission speed of the link is 8 Mbps (Megabits per second)? а. .000001 second O b. .125 seconds с. .000125 seconds O d. .001 second
- 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 secondsConsider two systems P and Q connected via a router R with the bandwidth of 2 Gbps. The length of the packet is 1000 bytes. The propagation delay between P and Q is 200 microseconds. The distance between the P and R is 10 km while the distance between R and Q is 5 km. The propagation speed in meter per second if each link is having the same 10³ km/s? propagation speed isConsider a network connecting two systems located 4000 kilometers apart. The bandwidth of the network is 500 x Mbps. The propagation speed of the media is 4 × 106 meters per second. It is needed to design a Go-Back-N sliding window protocol for this network. The average packet size is 107 bits. The network is to be used to its full capacity. Assume that processing delays at nodes are negligible. What is the minimum size in bits of the sequence number field?
- Consider a network using slotted aloha medium access control protocol, where each frame length is of 8000 bits. The channel Bandwidth rate is 10 KBps. The average number of transmissions at each node are 20 frames per second and propagation delay is 10 ms. The average number of successful transmissions is given by ? (Round off to two decimal places).A link has a transmission speed of 1010 bits/sec. It uses data packets of size 2000 bytes each. The efficiency of the stop-and-wait protocol in this setup is exactly 30%. Determine the value of the one-way propagation delay in milliseconds. Assume that the acknowledgement has negligibletransmission delay, and its propagation delay is the same as the data propagation delay. Consider the same transmission speed and packet size for Go back-N protocol with window size 8 and find the channel utilization.Suppose that Bob sends N back-to-back packets (numbered 1 to N) to Alice over two links (shown below) with the link between Bob's computer and the router having a transmission rate of R bits/sec (bps), and the link between the router and Alice's computer having a transmission rate of 2R bps. Bob Alice R bps 2R bps Router Find a formula, in terms of N, L and R, that characterizes the end-to-end delay of sending the N packets to Alice (i.e., the time needed for the last bit of the Nth packet to arrive at Alice since Bob starts transmitting the first bit of the first packet). Consider only the transmission delay that occurs in sending packets in your analysis. Show your work in detail. Also, using your formula, N = 800 packets, L find the end-to-end delay when 400 bits, and R = 100 bps.