Question 1

Which of the following statements about the default scheduler in the Nokia 7750 SR is FALSE?

Accepted Answer

The default scheduler does not necessarily spend an equal amount of time on each queue; it prioritizes based on queue type and configuration.

Question 2

Which of the following statements about burst-limit of a queue is FALSE?

Accepted Answer

If the burst-limit is not configured, the queue does not automatically use a default burst-limit value; instead, it may allow bursts based on other parameters or configurations.

Question 3

While deciding how to share the available bandwidth among its children, when does a port scheduler consider the parameter "level" of a child?

Accepted Answer

The port scheduler considers the "level" of a child during the allocation of above-CIR (Committed Information Rate) bandwidth to prioritize traffic when resources are limited.

Question 4

Which of the following components are NOT configured in a hierarchical scheduler policy?

Accepted Answer

The answer of Which of the following components are NOT...

Question 5

Which of the following traffic types is typically rate-limited by applying shaping and soft-policing on access ingress?

Accepted Answer

Best-effort traffic is typically rate-limited by applying shaping and soft-policing on access ingress to ensure that it does not consume excessive bandwidth and affect higher-priority traffic types.

Question 6

Which of the following are examples of metrics for QoS?

Accepted Answer

QoS (Quality of Service) metrics typically include delay, jitter, and packet loss, which are critical for assessing the performance of a network in delivering data efficiently and reliably.

Question 7

An IOM3 card of a Nokia7750 SR is enabled with the default scheduler and the policy shown in the image is applied to an access port on this card. In which order will packets be scheduled out of the queues?

Accepted Answer

The answer of An IOM3 card of a Nokia7750 SR...

Question 8

Which of the following statements about marking packets is TRUE?

Accepted Answer

The answer of Which of the following statements about marking...

Question 9

Which of the following statements describes a queue's weight parameter that is used in the hierarchical scheduling?

Accepted Answer

The weight parameter in hierarchical scheduling is used to determine how queues share available bandwidth above the Committed Information Rate (CIR) at the same level.

Question 10

Which of the following is NOT an adaptation rule supported on the Nokia 7750 SR for calculating the operational CIR/PIR of a queue?

Accepted Answer

The Nokia 7750 SR supports adaptation rules such as Closest, Min, and Max for calculating operational CIR/PIR, but not Average.

Question 11

An egress port scheduler applied to an Ethernet port has a configured bandwidth of 100 Mbps. All frames transmitted on the port are 80 bytes. What is the aggregate transmit bandwidth of all queues using the port scheduler?

Accepted Answer

The aggregate transmit bandwidth of all queues using the port scheduler is the configured bandwidth of the port, which is 100 Mbps. The size of the frames does not affect the total bandwidth available.

Question 12

Which of the following are characteristics of DSCP? (Choose two)

Accepted Answer

The answer of Which of the following are characteristics of...

Question 13

Which of the following BEST describes a SAP when regarding QoS?

Accepted Answer

A SAP (Service Access Point) is where the initial classification of customer traffic occurs in a network, which is essential for applying QoS policies.

Question 14

Packets arrive at the VPLS SAP on PE1 with DSCP marking of af11 and Dot1p of 2. According to the QoS policies applied at routers PE1, P, and PE2, what is the DSCP value of packets egressing router PE2? (All the SDPs are MPLS-encapsulated, and all interfaces are using their default trust states).

Accepted Answer

The answer of Packets arrive at the VPLS SAP on...

Question 15

Which of the following are major components of QoS functionality on the Nokia 7750 SR? (Choose three)

Accepted Answer

Traffic classification, buffer memory management, and traffic scheduling are major components of QoS functionality on the Nokia 7750 SR, as they help in identifying, managing, and prioritizing network traffic.

Question 16

Which of the following statements about configuring a hierarchical scheduler policy on a SAP is FALSE?

Accepted Answer

A queue's parent scheduler does not necessarily have to be a Tier-3 scheduler; it can be associated with any appropriate tier as per the configuration requirements.

Question 17

At which point are internal QoS markings added to the packets?

Accepted Answer

The answer of At which point are internal QoS markings...

Question 18

A frame belonging to a Layer 2 service is encapsulated in an MPLS tunnel at a network-egress port. Which of the following fields in the frame can be marked or remarked at the network egress port?

Accepted Answer

The EXP (Experimental) field in the MPLS header can be used for marking or remarking at the network egress port.

Question 19

Which of the following statements about the bandwidth allocation criteria used by an egress port scheduler is TRUE?

Accepted Answer

The answer of Which of the following statements about the...

Question 20

Which of the following self-generated traffic applications is considered "management" traffic, as opposed to "protocol" traffic?

Accepted Answer

ICMP (Internet Control Message Protocol) is considered "management" traffic because it is used for diagnostic and control purposes, such as error messages and network diagnostics, rather than for routing or signaling like the other options.

Exam 1: Nokia Scalable IP Networks