Performance Metrics

Performance Metrics (Throughput, Bandwidth, Delay, Latency): A path in a digital circuit-switched network has a data rate of 2 Mbps. The exchange of 2000 bits is required for setup/teardown. Distance = 10,000 km, propagation speed = 2×10⁸ m/s. Find: (i) total delay for 10,000 bits transferred, (ii) total delay for 1,00,000 bits, (iii) total delay for 10,00,000 bits. (6 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Find the propagation time and transmission time for a 5-kbyte email if bandwidth = 2 Gbps, distance = 24,000 km, light speed = 2.4×10⁸ m/s. (4 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Evaluate the end-to-end delay (transmission + propagation delays across three links, ignoring queuing/processing) from when the left host starts transmitting the first bit to when the last bit is received. Propagation speed = 2.4×10⁸ m/s. Packet length = 10,000 bits; link rates/distances given in a diagram (Link1: 10 Mbps/2 km, Link2: 100 Mbps/1000 km, Link3: 100 Mbps/3 km). Answer in ms. (6 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): A network with bandwidth 10 Mbps passes an average of 12,000 frames/minute, each carrying 10,000 bits on average. What is the throughput? (2 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Find propagation time and transmission time for a 2.5-kbyte email if bandwidth = 1 Gbps, distance = 12,000 km, light speed = 3×10⁸ m/s. (3 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): A path in a digital circuit-switched network has data rate 1 Gbps; 1000 bits needed for setup/teardown; distance = 5000 km; propagation speed = 2×10⁸ m/s. What is the total delay if 10,000 bits are exchanged during data transfer? (5 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Define Bandwidth and Throughput in networking terms. A system generates 20-bit frames over a shared 20 kbps channel; find throughput if frame rate is 1000 fps. (5 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): 30 Megabits of data sent 10,000 km, bandwidth = 10 Mbps, propagation speed = 2×10⁸ m/s, router processing time = 0.01 s. Determine the latency for the first packet and calculate the Bandwidth-Delay product. (5 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Ignoring processing/queuing/control-overhead delays: message size 30,000 bits, propagation time 10 ms/hop, packet length 1000 bits, transmission rate 10,000 bps/hop, call setup time 2 ms. Find total time for both circuit switching and packet switching when intermediate nodes = 2, 5, 10, 50, 100. Comment on performance trend as nodes increase. (10 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Two hosts communicate via router R with average service (queuing+processing) delay 15 ms, packet size 6,000 bits, propagation delay 250 ms. (i) If latency must stay under 350 ms, find the minimum link capacity. (3 marks)

Performance Metrics (Throughput, Bandwidth, Delay, Latency): Give an example of a delay-intolerant Internet application and identify which switching network suits it. (2 marks)