Define bandwidth-delay product in the context of network performance. What is the importance of the bandwidth-delay product for networks? Give an example of a system that has large bandwidth-delay product
Answers
A 2 km long broadcast lan has 107 bps bandwidth and uses csma/cd. The signal travels along the wire at 2 108 m/s. What is the minimum packet size that can be used on this network?
Bandwidth-delay product:
- The bandwidth-delay product is defined as the product of datalink capacity in bits per second and its end to end delay.
- Bandwidth delay Product is an important metric for flow Control at the transport layer.
- Bandwidth delay product helps in calculating the maximum link utilization in the network.
Importance of the bandwidth-delay product for networks:
- It is the product of the available bandwidth and the latency.
- It is used to calculate the window size, which is necessary for Proper network functioning.
- The formula to calculate window size is , W = 2BD + 1
- It is an essential concept in a 'Window-based protocol' like TCP.
- Bandwidth Delay Product defines the quantity of data that can be in transit in the network that is the data was transmitted but not yet received.
An example of a system that has a large bandwidth-delay product:
- A system having large Bandwidth-delay product is a geosynchronous satellite connection where the delivery time is high and the link throughput also high.
Learn more about delay
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