Click the exhibit button below. A network operator has configured the SAP-ingress policy below. Ping traffic is expected in queue 3. However, the network operator notices that all traffic is placed in queue 1. What is the most probable reason for this?

The SAP-ingress policy has not been applied to the SAP.

The default forwarding class for all traffic, including ICMP, is BE, which is placed in queue 1.

The IP-match criteria has been misconfigured for ICMP traffic.

Queue 3 has no rate or CIR configured and thus cannot hold any packets.

The SAP-ingress policy has not been applied to the SAP.

Which of the following are possible criteria for classifying packets at the SAP-ingress? (Choose three)

The packet's source and destination IP addresses.

The dot1p bits in the frame header.

The EXP bits in the MPLS header.

The packet's source and destination IP addresses.

The service ID of the service to which the SAP belongs.

The dot1p bits in the frame header.

Real-time rate limiting on the service ingress is a feature that performs_____________. Traffic above the defined PIR is ______________.

Metering, marked discard eligible

Marking, marked discard eligible

Which of the following statements regarding scheduling on the Nokia 7750 SR is TRUE? (Choose two)

When using profile-mode queues, traffic that is marked as in-profile on ingress and scheduled in the above-CIR loop will still be considered as in-profile at egress.

The greater the difference between PIR and CIR rates in a queue, the less likely a CIR will be provided.

When using profile-mode queues, traffic that is marked as in-profile on ingress and scheduled in the above-CIR loop will still be considered as in-profile at egress.

When an HQoS strategy using an egress port-scheduler has been deployed, Tier 1 receives its scheduling rates based on the amount of egress bandwidth available for each forwarding class.

The greater the difference between PIR and CIR rates in a queue, the less likely a CIR will be provided.

Packets scheduled out of high-priority queues in the default scheduler will have a lower chance of packet loss at the expense of incurring a higher probability of delay.

When using priority-mode queues, traffic that is marked as in-profile on ingress and scheduled in the above-CIR loop will be considered as in-profile at egress.

Click the exhibit button below. At router PE1, customer packets are arriving tagged with a dotlp value of 6 and marked with a DSCP value of EF.Based on the configuration shown below for a VPLS service, what will be the DSCP and EXP marking for the packet egressing the network port on this PE router? (Choose two)

The DSCP value will remain as ef.

The EXP value, in the MPLS headers, will be set to 3.

The DSCP value will be set to af21.

The DSCP value will be set to af23.

The DSCP value will remain as ef.

The EXP value, in the MPLS headers, will be set to 4.

The EXP value, in the MPLS headers, will be set to 3.

Which of the following statements is considered best practice when changing a network policy that has been associated with an interface?

A new network policy should be created and applied to the interface, overwriting the previous policy.

The policy should be placed in a 'shutdown' state before changes are made.

A new network policy should be created and applied to the interface, overwriting the previous policy.

The policy must first be removed from the interface, then modified and re-applied to the interface.

Before the policy can be changed, it must be deleted with the no network qos command.

Before any changes are made to the policy, all network interfaces where the policy is applied have to be shut down.

Which of the following statements regarding buffer pool allocation are FALSE? (Choose two)

All SAP-ingress ports on the same MDA share a buffer pool.

Each network ingress port on the same MDA receives its own buffer pool.

Each network egress port receives its own buffer pool.

Each SAP-egress port receives its own buffer pool.

All SAP-ingress ports on the same MDA share a buffer pool.

All the network ingress ports on the same MDA share a buffer pool.

Each network ingress port on the same MDA receives its own buffer pool.

Which of the following are examples of metrics for QoS?

Signal degradation, attenuation, line loss

Attenuation, dispersion, latency

Which of the following statements regarding DSCP bits are TRUE? (Choose three)

The three most significant (first) bits define 8 forwarding classes.

The three least significant (last) bits of the DSCP specify the drop probability.

To convert DSCP to IP precedence, the three most significant (first) bits are matched.

The three most significant (first) bits define 8 forwarding classes.

The three least significant (last) bits of the DSCP specify the drop probability.

The full 8 bits of the TOS field are used for DSCP.

To convert DSCP to IP precedence, the three most significant (first) bits are matched.

DSCP provides for eight drop probabilities.

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

DSCP is part of the Layer 3 header.

DSCP specifies eight different priorities.

DSCP specifies four precedence levels.

DSCP is part of the Layer 2 header

DSCP specifies 128 different per-hop behaviors.

What is an SLA? (Choose two)

An SLA is an agreement between a customer and a provider that dictates the treatment of customer traffic across the provider's network.

An SLA allows a customer to pre-mark traffic and ensure that traffic is treated as per the agreement within the provider's network.

An SLA is used to provide automated, real-time testing and alarming for throughput, latency, and jitter across a provider's network.

An SLA is an agreement between a customer and a provider that dictates the treatment of customer traffic across the provider's network.

An SLA allows customers to control all traffic within the service provider's network by prioritizing their traffic over others as desired.

An SLA allows a customer to pre-mark traffic and ensure that traffic is treated as per the agreement within the provider's network.

An SLA is a standard set of network QoS policies that a provider shares to all its customers, allowing them to better understand the treatment of traffic within the provider's network.

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

Microflow reservations using RSVP

Automatic profiling and policy configuration

Which of the following are characteristics of 802.1p? (Choose two)

802.1p uses a field in the 802.1Q header.

802.1p defines a 3-bit Class of Service field.

802.1p adds 16 bits to the Layer 2 header,

802.1p adds 16 bits to the Layer 3 header.

802.1p specifies 64 different priority levels.

802.1p uses a field in the 802.1Q header.

802.1p uses a field in the Layer 3 IP header

802.1p defines a 3-bit Class of Service field.

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

A point at which the initial classification of customer traffic occurs.

A point in the network where EXP bits can be mapped to one of eight predefined FCs, each one with its own queue.

A logical point in a service tunnel where all of customer traffic is aggregated.

A point at which the initial classification of customer traffic occurs.

A point in the network where QoS parameters are discarded in favor of lower-level hardware queuing functions, such as LLI (Link Layer Interleave).

A point in the network where traffic flows from multiple different services are queued together, based on forwarding class.

Which of the following are possible criteria for classifying packets at the network port ingress on the Nokia 7750 SR? (Choose three)

The EXP bits in the MPLS header.

The dot1p bits in the frame header.

The EXP bits in the MPLS header.

The packet's source and destination IP addresses.

The dot1p bits in the frame header.

The ID of an SDP that is transporting the packet.

Which of the following are NOT ingress matching criteria for a network policy? (Choose two)

Source and destination IP addresses

On an Nokia IOM 3, how is buffer memory allocated per forwarding complex?

768 MB dynamically allocated between ingress and egress.

1 GB dynamically allocated between ingress and egress.

768 MB dynamically allocated between ingress and egress.

768 MB, with a minimum of 256 MB ingress and egress, and an additional 256 MB dynamically allocated.

Click the exhibit button below. Given the slope-policy (below), which of the following statements are TRUE? (Choose two)

When the shared buffer utilization reaches 55%, both in-profile and out-of-profile packets may be dropped.

The maximum probability with which an out-of-profile packet can be dropped is higher than that of an in-profile packet.

All out-of-profile traffic will be dropped before that of any in-profile traffic.

The discard probability slope of an in-profile traffic is steeper than that of an out-of-profile traffic.

When the shared buffer utilization reaches 55%, both in-profile and out-of-profile packets may be dropped.

The maximum probability with which an out-of-profile packet can be dropped is higher than that of an in-profile packet.

When the shared buffer utilization is at 61%, only in-profile packets are currently in the shared buffer pool.

Click the exhibit button below. Given the SAP-ingress policy, which of the following statements are FALSE? (Choose three)

UDP traffic can be serviced at a maximum rate of 20 Mbps.

Queues 5 and 6 will receive equal portions of any remaining available bandwidth to meet their above-CIR bandwidth requirements.

Queue 3 is scheduled before queue 5.

Queue 5 is using priority mode.

UDP traffic can be serviced at a maximum rate of 20 Mbps.

Ping traffic is place in queue 5.

Queues 5 and 6 will receive equal portions of any remaining available bandwidth to meet their above-CIR bandwidth requirements.

Queue 3 is scheduled before queue 5.

Which of the following should be performed if a service provider does not want packets to make use of the shared buffer space when queued?

Set the high-priority-only equal to the MBS.

Set the high-priority-only to 0.

Which of the following statements BEST describes an MBS parameter?

It specifies the maximum depth of a queue beyond which packets will be dropped.

It specifies the maximum rate at which a queue can be serviced.

It specifies the maximum depth of a queue beyond which packets will be dropped.

It specifies the portion of a queue that is taken from the reserved buffer pool.

It specifies the threshold beyond which only in-profile packets will be queued.

It specifies the peak bandwidth that can be attained by the incoming traffic.

How many queues are available for use on service egress within a VPLS service?

8 queues, regardless of traffic type.

16 queues, distributed as desired.

Click the exhibit button below. Given the output of the #show pools 1/2/2 network-egress command on a GigE port, what can the service provider deduce? (Choose two)

Packets in forwarding classes 'be' and '12' are being queued.

Traffic belonging to forwarding class 'ef' is not experiencing queuing delays.

QoS is not configured on the router.

Packets in forwarding classes 'be' and '12' are being queued.

Traffic belonging to forwarding class 'ef' is not experiencing queuing delays.

Traffic belonging to forwarding class '11 'will never make use of the shared buffer pool.

Out-of-profile traffic in the shared buffer pool is being dropped.

Nokia 4A0-107 Practice Test 1 - Free Online Exam Prep & Questions

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

A.

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

B.

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

C.

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

D.

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

E.

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

Nokia 4A0-107 Practice Test 1

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