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10 Questions

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Packet Queuing in Router Buffers

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Questions and Answers

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

Queueing, link bandwidth, transmission delay, physical link length

Queueing, processing, transmission, propagation

Bit errors, link determination, propagation speed, transmission

Bit errors, output link determination, packet length, propagation delay (correct)

What does the propagation delay depend on in a network?

Output link congestion level

Bit errors

Link bandwidth

Physical link length and propagation speed (correct)

Which formula describes the transmission delay in a network?

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

$d_{trans} = \frac{L}{R}$ (correct)

$d_{trans} = L + R$

$d_{trans} = L - R$

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. Signup and view all the answers

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

All of the above Signup and view all the answers

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

min(Rc, Rs, R/10) Signup and view all the answers

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

They impact the overall throughput of data transfer. Signup and view all the answers

How are networks organized into layers according to the text?

Each layer relies on services provided by the layer below Signup and view all the answers

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

Rc Signup and view all the answers

What is the purpose of layering in network functionality?

To implement services via internal-layer actions relying on lower layers Signup and view all the answers