A physical port has three associated buffer pools. Which of the following buffer pool combinations is associated to a physical port?

Access ingress, access egress, network egress

Access ingress, network ingress, network egress

Port ingress, port egress, shared bi-directional

Port ingress, port egress, network egress

Port ingress, network ingress, network egress

Which of the following are the minimum requirements needed to classify traffic marked with DSCP AF11, AF12, and AF13 into the AF forwarding class and provide fair treatment to the drop precedence settings? (Choose three)

1 forwarding class, with 2 subclasses

1 forwarding class, with 3 subclasses

Click the exhibit button below. A service provider has applied the SAP-ingress policy configuration below on his customer's SAP. The service provider notices that all of the customer's traffic is being dropped at the SAP-ingress. Which of the following actions can resolve the problem, if applied on its own? (Choose three)

Set the traffic classification of packets to in-profile.

Set the high-priority-only value to 0.

Set the CIR of queue 3 to a non-zero value corresponding to the customer's expected bandwidth requirements.

Set queue 3 to use priority mode.

Set the traffic classification of packets to in-profile.

Set the high-priority-only value to 0.

In the context of hierarchical scheduling, a scheduler is configured with a CIR weight of 0. Which of the following statements is TRUE?

The scheduler will not be allocated its 'within CIR' bandwidth.

The scheduler will be allocated its 'within CIR' bandwidth before all other children at the same level have received their 'within CIR' bandwidth.

The scheduler will be allocated its 'within CIR' bandwidth after all other children at the same level have received their 'within CIR' bandwidth.

The scheduler will be allocated its 'within CIR' bandwidth after all other children at all levels have received their 'within CIR' bandwidth.

The scheduler will not be allocated its 'within CIR' bandwidth.

Which of the following statements describe the primary objectives of the policing of traffic flows on the Nokia 7750 SR? (Choose two)

Ensure that traffic flows conform to their traffic profile.

Provide fairness between traffic flows, so that conforming (in-profile) traffic flows are not starved of bandwidth and/or buffer space by non-conforming (out-of-profile) flows.

Ensure that traffic flows conform to their traffic profile.

Log violations of metered traffic flows exceeding the CIR value set on the entity across which the traffic is moving.

Provide fairness between traffic flows, so that conforming (in-profile) traffic flows are not starved of bandwidth and/or buffer space by non-conforming (out-of-profile) flows.

Minimize packet loss and reduce end to end latency.

Ensure that variable latencies do not cluster short bursts of originally conforming packets and render them nonconforming.

In which of the following scenarios is the egress port scheduler useful? (Choose two)

A customer is complaining that his VoIP traffic is being dropped even though it is sending the correct DSCP markings. Packets are not being dropped on ingress.

A commercial builder has requested numerous dot1Q epipes, VPRNs, and VPLS services to a business park and is only paying up to a maximum 200Mbps.

A customer is complaining that his VoIP traffic is being dropped even though it is sending the correct DSCP markings. Packets are not being dropped on ingress.

A customer is complaining that his VoIP traffic is being dropped even though it is sending the correct DSCP markings. Packets are being dropped on ingress.

A commercial builder has requested numerous dot1Q epipes, VPRNs, and VPLS services to a business park and is only paying up to a maximum 200Mbps.

An equipment manufacturer has requested a NULL epipe service that will transparently pass dot1Q between the new location and national headquarters.

Which of the following statements about CIR of a queue is TRUE?

It is the rate at which packets are forwarded out of the queue.

It may exceed PIR of the queue.

It may be exceeded by the average servicing rate of the queue.

It varies depending on the traffic characteristics.

It is the rate at which packets are forwarded out of the queue.

Which of the following is NOT a characteristic of policing?

It drops the packets when average peak rate is exceeded.

It may additionally color the packets as they arrive.

It buffers the packets at its output before sending them out.

Which following statements about the four-step QoS process (classification, queuing, scheduling, and marking/remarking) executed for every packet entering a Nokia 7750 SR is TRUE?

Marking/remarking the packets will occur right after classification of the packet.

The process happens only before the packet goes through the switching fabric.

The process happens only before the packet goes onto the egress port.

Marking/remarking the packets is for future classification.

Marking/remarking the packets will occur right after classification of the packet.

Which of the following policies does NOT exist by default on a network port?

A network policy for every network interface configured on the port.

A slope policy for the port on ingress.

A network queue policy for the corresponding MDA on ingress.

A network queue policy for the port on egress.

Which of the following statements about Assured Forwarding (AF) Per Hop Behavior (PHB) groups is FALSE?

It defines a premium service that effectively creates a dedicated link between peers.

It defines four different AF traffic classes.

Every AF class in each differentiated services node is allocated a certain amount of forwarding resources.

Within each AF class, IP packets are marked with one of three possible drop precedence values.

Which of the following statements about behavior aggregate and multi-field classification in a Nokia 7750 SR is TRUE?

Behavior aggregate classification cannot use both dot1p and lsp-exp in the same SAP-ingress QoS policy.

Multi-field classification can use both MAC criteria and IP criteria in the same SAP-ingress QoS policy.

Behavior aggregate classification can use both lsp-exp and dscp in the same SAP-ingress QoS policy.

Multi-field classification cannot use both IP criteria and IPv6 criteria in the same SAP-ingress QoS policy.

Behavior aggregate classification cannot use both dot1p and lsp-exp in the same SAP-ingress QoS policy.

Which of the following statements about a SAP-ingress policy is FALSE?

It serves the classification, queuing, and marking functions of QoS but does not serve scheduling

It maps customer traffic to forwarding classes on ingress.

It can use customer QoS markings to do the mapping.

The default SAP-ingress policy classifies all traffic into FC ''be'' with low priority.

It serves the classification, queuing, and marking functions of QoS but does not serve scheduling

Which of the following statements about network QoS policies is FALSE?

Classification is performed with behavior-aggregate statements only.

Classification rules must specify both an FC and a profile for the packets.

A network policy is applied at a physical port.

Classification is performed with behavior-aggregate statements only.

Match criteria can be chosen from dot1p, DSCP, and EXP fields in the packet.

Which parameter can be configured in a network ingress QoS policy?

The profile (in/out) to be assigned to the packets.

The priority (low/high) to be assigned to the packets.

The profile (in/out) to be assigned to the packets.

The queues to be assigned to the forwarding classes.

The markings to be marked on the packets.

Which of the following statements BEST describes where shaping mechanisms should be applied?

At the junction of high-speed to low-speed links or at places of traffic aggregation.

On all ports on the Nokia 7750 SR.

At the junction of high-speed to low-speed links or at places of traffic aggregation.

At the junction of low-speed to high-speed links or at places of traffic aggregation.

Nowhere. Shaping is only performed in hardware and serviced in a round-robin.

When using an egress port scheduler, on which scheduling loop are orphaned queues serviced?

Level 8, once all PIR is serviced.

Level 1, once all PIR is serviced.

Which of the following statements regarding the egress port scheduler is TRUE?

Multiple HQoS policies can be children of a single port scheduler.

The egress port scheduler can have up to 17 children spread across 8 levels.

Multiple egress port schedulers can be assigned to a single port with many HQoS children.

Multiple HQoS policies can be children of a single port scheduler.

Multiple egress port schedulers can be children of a single HQoS scheduler.

To implement Hierarchical-QoS (Multi-tiered scheduling), which of the following actions must be undertaken? (Choose three)

A scheduler-policy must be configured.

The scheduler-policy must be referenced in the SAP-ingress and SAP-egress policies.

The scheduler-policy must be applied on the service SAP.

H-QoS capabilities must be enabled globally on the router

A scheduler-policy must be configured.

The queues in the SAP-ingress and SAP-egress policies do not require additional configuration attributes to make use of the hierarchical schedulers.

The network queue policy must be configured to make use of the scheduler-policy.

The scheduler-policy must be referenced in the SAP-ingress and SAP-egress policies.

The scheduler-policy must be applied on the service SAP.

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

When policing is enabled on the SAP-ingress, all traffic is considered as in-profile.

Setting the CIR and PIR to equal values disables soft-policing.

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.

Click the exhibit button below. Given this scheduler-policy configuration, which of the following can be said about the scheduler called 'high'? (Choose two)

It can allocate up to 50 Mbps of bandwidth to scheduler 'low' since the bandwidth is not used by another Tier 3 scheduler.

It can only have queues as children.

Which of the following statements regarding egress FC and profile over-ride are TRUE? (Choose two)

This feature is available on egress SAPs within any service.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, the BA classification can override the forwarding class while the MF classification can override the profile.

Packets can be classified into 16 different FCs when using priority mode queuing.

This feature is available on egress SAPs within any service.

MPLS EXP bits can be changed based on multi-field classification.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, only the MF override parameters will take effect.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, the BA classification can override the forwarding class while the MF classification can override the profile.

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 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.

In which of the following scenarios is self-generated traffic QoS (sgt-QoS) useful?

The priority of various control packets requires special treatment throughout the network.

EXP markings on transit control traffic are not set correctly.

The priority of all self-generated traffic needs to be lowered to allow all other traffic to take precedence.

The priority of various control packets requires special treatment throughout the network.

The BGP process is consuming too many CPU cycles and is impacting OSPF performance.

Nokia 4A0-107 Practice Test 2 - Free Online Exam Prep & Questions

A queue is configured with the following attributes:

MBS = 10KB

CBS = 5KB

High-Priority-Only = 20%

Assume that there is no CBS overbooking and that the slope-policy is disabled. If the current queue depth is 3KB, what will happen to an out-of-profile packet arriving at an egress queue?

A.

It will be queued in the reserved portion of the buffer pool and remain out-of-profile.

B.

It will be queued in the reserved portion of the buffer pool if there are no in-profile packets already in the queue.

C.

It will be queued in the reserved portion of the buffer pool and be in-profile.

D.

It will be queued in the shared portion of the buffer pool but contend for shared buffer space with packets from other queues.

E.

It will be queued in the shared portion of the buffer pool but may be dropped if the buffer utilization exceeds the start-average value of the low slope.

Nokia 4A0-107 Practice Test 2

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