Packet Queuing in Router Buffers

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10 Questions

What are the four sources of packet delay in a network nodal processing?

Bit errors, output link determination, packet length, propagation delay

What does the propagation delay depend on in a network?

Physical link length and propagation speed

Which formula describes the transmission delay in a network?

$d_{trans} = \frac{L}{R}$

In the context of network performance metrics, what does 'average end-end throughput' refer to?

The rate at which bits are transferred between sender/receiver over a longer period of time.

What may happen to a packet that arrives at a full queue preceding a link?

All of the above

What is the formula for calculating per-connection end-end throughput in the Internet scenario?

min(Rc, Rs, R/10)

What is the significance of 'real internet delays' in the context of network performance?

They impact the overall throughput of data transfer.

How are networks organized into layers according to the text?

Each layer relies on services provided by the layer below

In practice, which one is often the bottleneck link among Rc and Rs?

Rc

What is the purpose of layering in network functionality?

To implement services via internal-layer actions relying on lower layers

This quiz covers the concept of packets queuing in router buffers when the packet arrival rate to the link exceeds the output link capacity. It also explains the sources of packet delay including nodal processing, transmission, propagation, and queuing.

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