Consider a satellite link with a capacity of 1 Mbps, bit error rate 10^-8 , and propagation delay of 270 msec. Assuming selective reject ARQ with a window of 64 and 10,000 bit frames, calculate the maximum link utilization
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Consider a satellite link with a capacity of 1 Mbps, bit error rate 10^-8 , and propagation delay of 270 msec. Assuming selective reject ARQ with a window of 64 and 10,000 bit frames, calculate the maximum link utilization
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- Que.a) Consider a CSMA/CD network that transmits data at a rate of 400 x 106 bits per second. The maximum signal propagation time from one node to another node is 20 microseconds. The minimum size of a frame in the network is(. bytes).Frames of 1000 bits are sent over a 106 bps duplex link between two hosts. The propagation time is 25 ms. Frames are to be transmitted into this link to maximally pack them in transit (within the link). 1.1 What is the minimum number of bits (1) that will be required to represent the sequence numbers distinctly? Assume that no time gap needs to be given between transmission of two frames.Consider a full-duplex 256 Kbps satellite link with a 240 millisecond end-to-end delay. The data frames carry a useful payload of size 12,000 bits. Assume that both ACK and data frames have 320 bits of header information, and that ACK frames carry no data. What is the effective data throughput When using sliding windows with a sender window size of W = 5 data frames?
- Q. Determine the efficiency of a token ring with a data rate of 250Mbps, a ring latency of120 µsec and 5000 bit packets. Assume N hosts want to transmit and each host holds the token for a maximum of frame transmission time.In the communication in the figureFor Link 1; Bandwidth 150 Mbps Line Length 5 km For Link 2; Bandwidth 50 Mbps Line Length 2000 km For Link 3; Bandwidth 1000 Mbps Line Length 1 km For 4000 bit packet length and the case where fiber optic and light speed of all connections are 3x10^8 m / sec; Question 2. Assuming there are no queue and processing delays, calculate the end-to-end delay in milliseconds.Computer Science Two flows are transmitting at a constant rate of 4Mbps and 8Mbps and compete for service at a 10Mbps link. If the link adopts an RED policy, what is the expected drop probability for each flow?
- Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show a complete solution for each problem2. Suppose network users share a 4 Mbps link. Also, suppose each user requires 200 kbps when transmitting, but each user transmits only 15% of time.a. When circuit switching is used, how many users can be supported?b. Suppose packet switching is now used and that there are 20 users. Find the probability that any given time, at most 4 users are transmitting simultaneously.For the microwave link shown below, what is the value of the free-space path loss if the operating frequency is 11.8 GHz? For the above microwave link, find the maximum allowed distance between the transmitter and the receiver to maintain the communication, if the transmitter antenna height is ht=30m and the receiver antenna height is hr=25 m.Assume a 10Mbps Ethernet has two nodes, A and B, connected by a 360m cable with threerepeaters in between, and they each have one frame of 1,024 bits to send to each other. Further assumethat the signal propagation speed across the cable is 2*10^8 m/sec, CSMA/CD uses back-off intervals ofmultiples of 512 bits, and each repeater will insert a store-and-forward delay equivalent to 20-bittransmission time. At time t=0, both A and B attempt to transmit. After the first collision, A draws K = 0and B draws K = 1 in the exponential back-off protocol after sending the 48bits jam signal. a. What is the one-way propagation delay (including all repeater delays) between A and B inseconds? At what time is A's packet completely delivered at B? b. Now suppose that only A has a packet to send and that the repeaters are replaced with switches.Suppose that each switch has an 8-bit processing delay in addition to a store-and-forward delay.At what time, in seconds, is A's packet delivered at B?
- A network with a bandwidth of 20 Mbps can theoretically pass only an average of 12,000 frames per minute. a) What is the average size of the frame expressed in bits? b) The Achieved throughput is 5 Mbps. What is the ratio of throughput/bandwidth?Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show a complete solution for each problem1. Consider a client-server system with the following parameters and requirements. The client transmits 10x10^6 bits of data every minute to the data server connected directly to it. The transmission link speed is 20x10^6 bps. Each packet is 2,000 bytes long which includes a 20-byte packet header.a. Calculate the number of packets generated per second for data transmission at the client node.b. The system requires every packet must be delivered within 4 ms of generating a data packet. Calculate the maximum link distance between the client and the server that still can meet this requirement. Ignore processing and queuing delays.c. Calculate the number of overhead bits transmitted per second from the client to the server.Consider a system with link utilization is 50%, R.T.T. = 50 µsec, Bandwidth = 10 Mbps. What is data size (in bits).