Free Nokia Quality of Service Exam 4A0-107 Exam Practice Test

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

• The available bandwidth of the port is divided in a strict priority over its children.
• Expedited queues must be serviced before best-effort queues.
• Orphaned queues are serviced on the 8th scheduling priority.
• The configured CIR dictates the maximum port bandwidth that can be allocated during the within- CIR pass for that level.

Which of the following is NOT a factor when deciding if a packet can be accepted into a queue?

• Profile/priority state of a packet
• Forwarding class
• Queue depth
• HPO setting

A service provider is using GRE for his transport tunnel on the Nokia 7750 SR. How can traffic be marked as it traverses the service provider's network? (Choose two)

• Using dot1p bits of the 802.1q Ethernet frame header
• Using DSCP bits within the ToS field of the IP packet header.
• Using the IP precedence bits within the ToS field of the IP packet header.
• Using the CLP bit of the ATM cell header.
• Using the EXP bits of the MPLS transport label header.

Which of the following are examples of metrics for QoS?

• Signal degradation, attenuation, line loss
• Latency, FIFO, WRED
• Delay, jitter, packet loss
• SNR, queue depth, latency
• Attenuation, dispersion, latency

Which of the following statements regarding policing and shaping on the Nokia 7750 SR are TRUE? (Choose two)

• The larger the configured MBS value, the lower the amount of shaping performed.
• When policing is enabled on the SAP-ingress, all traffic is considered as in-profile.
• Setting the CIR to 1000 and the PIR to max will enable shapeless policing at 1 Mbps within the SAP-egress policy.
• Configuring MBS to equal CBS will disable shaping.
• Setting the CIR and PIR to equal values disables soft-policing.

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

• SAP-ingress
• FFPC
• SAP-egress
• network-egress

By default, how does a hybrid port on a Nokia 7750 SR share its allocated buffer space between access and network pools?

• All buffer space is initially allocated to access pools, and some of it is reallocated to network pools if network interfaces are configured on it.
• All buffer space is initially allocated to network pools, and some of it is reallocated to access pools if service SAPs are configured on it.
• Buffer space is allocated 50% for access pools and 50% for network pools.
• Buffer space is allocated 25% for access pools and 75% for network pools.

Which of the following is NOT a reason for configuring a slope policy on a queue?

• To have control over the amount of the low priority packets that enter the queue.
• To control any traffic flowing through the shared buffer space of the queue.
• To limit the number of the TCP sessions that go into slow start during congestion.
• To force the TCP algorithm to increase its transmission window upon detecting a congestion.

Forwarding subclasses are only relevant to, and are therefore applied within the context of, a policy.

• network
• scheduling
• slope
• SAP-ingress
• network-queue

Which of the following parameters are used in a hierarchical scheduler-policy to specify the priority of the child scheduler/queue for allocating bandwidth beyond its committed rate? (Choose two)

• CIR
• CIR level
• CIR weight
• Rate
• Level
• Weight