How does a shaper rate-limit a traffic stream?

Packets with an average arrival rate higher than PIR are buffered for future processing; conforming packets are immediately forwarded.

Packets that arrive in a burst are immediately dropped; packets that arrive with the proper in between space are immediately.

Packets are buffered on arrival and are forwarded at an average rate conforming with PIR, typically, with a reduced burstiness.

Packets with an average arrival rate higher than PIR are immediately dropped; conforming packets are forwarded at the same rate at which they arrive.

Which of the following statements are TRUE? (Choose two)

The primary contributors to latency are distance, scheduling, and congestion.

The round robin scheduling algorithm will result in less jitter for low priority traffic than a strict priority scheduler.

The weighted round robin scheduling algorithm will result in more delay for high priority traffic than the regular round robin algorithm.

Packet loss can be reduced by decreasing the amount of buffer space available to a queue.

Latency can be reduced by increasing the amount of buffer space available to a queue.

Which of the following statements describes an advantage of the DiffServ QoS model over the IntServ QoS model?

DiffServ is more scalable it treats traffic streams as aggregates.

DiffServ reserves resources dynamically using the RSVP protocol.

DiffServ only requires packets to be classified into forwarding classes at the first network hop.

DiffServ provides granular differentiation and superior fairness because it processes traffic streams individually.

Which of the following statements describe the operation of WRED on the Nokia 7750 SR? (Choose three)

WRED uses the shared buffer utilization, instead of the individual queue depth, to get a better picture of the average resource utilization of the shared buffer space.

WRED monitors the shared buffer space utilization over a period of time.

WRED disables the TCP slow-start congestion control mechanism.

WRED uses two configurable slopes for each buffer pool: a high slope and a low slope.

WRED polices the shared buffer pool and marks all packets above a certain rate as 'discard eligible.'

Free Nokia 4A0-107 Exam Practice Questions & Explanations

Last updated on: Oct 16, 2026
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