Question 1

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

Accepted Answer

A)  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. 
B)  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. 
C)  The greater the difference between PIR and CIR rates in a queue, the less likely a CIR will be provided. 
D)  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. 
E)  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. 
A)  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. 
B)  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. 
C)  The greater the difference between PIR and CIR rates in a queue, the less likely a CIR will be provided. 
D)  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. 
E)  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.

Question 2

How many bits in the IP ToS field define the packet's precedence?

Accepted Answer

A)  3 
B)  4 
C)  6 
D)  8 
A)  3 
B)  4 
C)  6 
D)  8

Question 3

If a packet is marked on a SAP-ingress, it will be remarked at the first network egress point (if remarking is enabled in the network egress policy).

Accepted Answer

A) True 
 B)False

Question 4

Which of the following are entities of the Nokia 7750 SR on which you can NOT apply a network-queue policy? (Choose three)

Accepted Answer

A)  Router interfaces 
B)  Ingress MDA 
C)  Ingress Ethernet network ports 
D)  Egress Ethernet network ports 
E)  Service SAPs 
A)  Router interfaces 
B)  Ingress MDA 
C)  Ingress Ethernet network ports 
D)  Egress Ethernet network ports 
E)  Service SAPs

Question 5

A hierarchical scheduler policy with the shown parameters is configured at a service ingress. If the offered rate of each queue is 10Mbps, what is the operational PIR and CIR for queue 3?

Accepted Answer

A)  PIR = 5 Mbps, CIR = 0 Mbps 
B)  PIR= 4 Mbps, CIR = 1 Mbps 
C)  PIR= 6 Mbps, CIR = 4 Mbps 
D)  PIR= 6 Mbps, CIR = 1 Mbps 
A)  PIR = 5 Mbps, CIR = 0 Mbps 
B)  PIR= 4 Mbps, CIR = 1 Mbps 
C)  PIR= 6 Mbps, CIR = 4 Mbps 
D)  PIR= 6 Mbps, CIR = 1 Mbps

Question 6

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

Accepted Answer

A)  It is a parent scheduler. 
B)  It is the top-level scheduler. 
C)  It can allocate up to 50 Mbps of bandwidth to scheduler "low" since the bandwidth is not used by another Tier 3 scheduler. 
D)  It is a child scheduler. 
E)  It can only have queues as children. 
A)  It is a parent scheduler. 
B)  It is the top-level scheduler. 
C)  It can allocate up to 50 Mbps of bandwidth to scheduler "low" since the bandwidth is not used by another Tier 3 scheduler. 
D)  It is a child scheduler. 
E)  It can only have queues as children.

Question 7

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

Accepted Answer

A)  The default scheduler spends an equal amount of time servicing each queue that has traffic to be sent out. 
B)  Queue-type can be configured as best-effort, expedite, or auto-expedite. 
C)  A queue will be serviced as expedited if its type is configured as expedited, regardless of the forwarding classes mapped to it. 
D)  A queue configured as auto-expedited will be an expedited queue as long as no Best Effort FC is mapped to it. 
A)  The default scheduler spends an equal amount of time servicing each queue that has traffic to be sent out. 
B)  Queue-type can be configured as best-effort, expedite, or auto-expedite. 
C)  A queue will be serviced as expedited if its type is configured as expedited, regardless of the forwarding classes mapped to it. 
D)  A queue configured as auto-expedited will be an expedited queue as long as no Best Effort FC is mapped to it.

Question 8

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

Accepted Answer

A)  All AF traffic will be marked "in-profile" at the SAP-ingress. 
B)  All TCP traffic will be mapped to forwarding class EF. 
C)  UDP traffic is placed in queue 3 while ICMP traffic is placed in queue 5. 
D)  EF traffic will receive higher scheduling priority than H2 traffic. 
E)  Traffic that does not match any of the IP criteria will be placed in queue 3. 
A)  All AF traffic will be marked "in-profile" at the SAP-ingress. 
B)  All TCP traffic will be mapped to forwarding class EF. 
C)  UDP traffic is placed in queue 3 while ICMP traffic is placed in queue 5. 
D)  EF traffic will receive higher scheduling priority than H2 traffic. 
E)  Traffic that does not match any of the IP criteria will be placed in queue 3.

Question 9

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)

Accepted Answer

A)  Set the CIR of queue 3 to a non-zero value corresponding to the customer's expected bandwidth requirements. 
B)  Set queue 3 to use priority mode. 
C)  Set the traffic classification of packets to in-profile. 
D)  Set the high-priority-only value to 0. 
E)  Map AF traffic to queue 1 
A)  Set the CIR of queue 3 to a non-zero value corresponding to the customer's expected bandwidth requirements. 
B)  Set queue 3 to use priority mode. 
C)  Set the traffic classification of packets to in-profile. 
D)  Set the high-priority-only value to 0. 
E)  Map AF traffic to queue 1

Question 10

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?

Accepted Answer

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. 
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.

Question 11

On the Nokia 7750 SR, what is a slope policy used for?

Accepted Answer

A)  Defining the slope of the TCP slow-start mechanism for self generated traffic. 
B)  Defining the slope of the scheduling rate per forwarding class when using HQoS. 
C)  Defining the high and low slope values when deploying buffer admission control for UDP traffic in the committed buffer pool. 
D)  Defining the high and low slope values when deploying buffer admission control for TCP traffic in the shared buffer pool. 
E)  Defining the high and low slope values when deploying buffer admission control for TCP traffic in the committed buffer pool. 
A)  Defining the slope of the TCP slow-start mechanism for self generated traffic. 
B)  Defining the slope of the scheduling rate per forwarding class when using HQoS. 
C)  Defining the high and low slope values when deploying buffer admission control for UDP traffic in the committed buffer pool. 
D)  Defining the high and low slope values when deploying buffer admission control for TCP traffic in the shared buffer pool. 
E)  Defining the high and low slope values when deploying buffer admission control for TCP traffic in the committed buffer pool.

Question 12

Which of the following statements regarding the default scheduler in the Nokia 7750 SR are TRUE? (Choose two)

Accepted Answer

A)  There are a maximum of 8 levels of priority serviced using a round-robin algorithm. 
B)  The default scheduler will spend an equal amount of time in each queue, as long as there is traffic present 
C)  The H1 internal forwarding class will receive its CIR before AF traffic. 
D)  Orphaned queues will be scheduled out of the BE queue. 
E)  A queue servicing EF and AF traffic will require explicit configuration to set the queue to expedited. 
A)  There are a maximum of 8 levels of priority serviced using a round-robin algorithm. 
B)  The default scheduler will spend an equal amount of time in each queue, as long as there is traffic present 
C)  The H1 internal forwarding class will receive its CIR before AF traffic. 
D)  Orphaned queues will be scheduled out of the BE queue. 
E)  A queue servicing EF and AF traffic will require explicit configuration to set the queue to expedited.

Question 13

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)

Accepted Answer

A)  QoS is not configured on the router. 
B)  Packets in forwarding classes "be" and "12" are being queued. 
C)  Traffic belonging to forwarding class "ef" is not experiencing queuing delays. 
D)  Traffic belonging to forwarding class "11 "will never make use of the shared buffer pool. 
E)  Out-of-profile traffic in the shared buffer pool is being dropped. 
A)  QoS is not configured on the router. 
B)  Packets in forwarding classes "be" and "12" are being queued. 
C)  Traffic belonging to forwarding class "ef" is not experiencing queuing delays. 
D)  Traffic belonging to forwarding class "11 "will never make use of the shared buffer pool. 
E)  Out-of-profile traffic in the shared buffer pool is being dropped.

Question 14

When deploying an Alcatel-Lucent MPLS network with QoS, how are the EXP bits set?

Accepted Answer

A)  The first 3 bits of the DSCP value are copied directly into the EXP field on the first network egress. 
B)  The EXP bits are set on the first network egress, based on a combination of the SAP-ingress classification and the network policy applied. 
C)  The 3 priority bits are copied directly from the dot1p header into the EXP field of the first MPLS header. 
D)  The EXP bits are set based on a default map that translates DSCP codes into internal forwarding classes on SAP-ingress. 
A)  The first 3 bits of the DSCP value are copied directly into the EXP field on the first network egress. 
B)  The EXP bits are set on the first network egress, based on a combination of the SAP-ingress classification and the network policy applied. 
C)  The 3 priority bits are copied directly from the dot1p header into the EXP field of the first MPLS header. 
D)  The EXP bits are set based on a default map that translates DSCP codes into internal forwarding classes on SAP-ingress.

Question 15

Which of the following are trusted boundaries, by default? (Choose two)

Accepted Answer

A)  An IES SAP 
B)  A VPLS SAP 
C)  A network port 
D)  AVPRN SAP 
E)  An access port 
A)  An IES SAP 
B)  A VPLS SAP 
C)  A network port 
D)  AVPRN SAP 
E)  An access port

Question 16

Without_______, a customer's high priority traffic can be dropped before its low priority traffic.

Accepted Answer

A)  packet filtering 
B)  prioritization of traffic flows 
C)  least cost routing 
D)  OAM functionality 
E)  separation between the data plane and the control plane 
A)  packet filtering 
B)  prioritization of traffic flows 
C)  least cost routing 
D)  OAM functionality 
E)  separation between the data plane and the control plane

Question 17

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

Accepted Answer

A)  Self-generated 
B)  Real-time 
C)  Best-effort 
D)  Assured 
A)  Self-generated 
B)  Real-time 
C)  Best-effort 
D)  Assured

Question 18

Which of the following are entities of the Alcatel-Lucent 7750 SR on which you can NOT apply a network-queue policy? (Choose three)

Accepted Answer

A)  Router interfaces 
B)  Ingress MDA 
C)  Ingress Ethernet network ports 
D)  Egress Ethernet network ports 
E)  Service SAPs 
A)  Router interfaces 
B)  Ingress MDA 
C)  Ingress Ethernet network ports 
D)  Egress Ethernet network ports 
E)  Service SAPs

Question 19

Traffic assigned to forwarding classes is placed into queues, while the contents of the queues are serviced in a controlled manner using____________.

Accepted Answer

A)  WRED 
B)  shapers 
C)  schedulers 
D)  markers 
E)  weighted fair queues (WFQ) 
A)  WRED 
B)  shapers 
C)  schedulers 
D)  markers 
E)  weighted fair queues (WFQ)

Question 20

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

Accepted Answer

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

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

How many bits in the IP ToS field define the packet's precedence?

If a packet is marked on a SAP-ingress, it will be remarked at the first network egress point (if remarking is enabled in the network egress policy).

Which of the following are entities of the Nokia 7750 SR on which you can NOT apply a network-queue policy? (Choose three)

A hierarchical scheduler policy with the shown parameters is configured at a service ingress. If the offered rate of each queue is 10Mbps, what is the operational PIR and CIR for queue 3?

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

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

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

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?

On the Nokia 7750 SR, what is a slope policy used for?

Which of the following statements regarding the default scheduler in the Nokia 7750 SR are TRUE? (Choose two)

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)

When deploying an Alcatel-Lucent MPLS network with QoS, how are the EXP bits set?

Which of the following are trusted boundaries, by default? (Choose two)

Without_______, a customer's high priority traffic can be dropped before its low priority traffic.

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

Which of the following are entities of the Alcatel-Lucent 7750 SR on which you can NOT apply a network-queue policy? (Choose three)

Traffic assigned to forwarding classes is placed into queues, while the contents of the queues are serviced in a controlled manner using____________.

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

Nokia Border Gateway Protocol

Nokia Multiprotocol Label Switching

Nokia Services Architecture

Nokia Virtual Private LAN Services

Nokia Virtual Private Routed Networks

Nokia Quality of Service

Nokia Multicast Protocols

Filters

Exam 1: Nokia Scalable IP Networks

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

How many bits in the IP ToS field define the packet's precedence?

If a packet is marked on a SAP-ingress, it will be remarked at the first network egress point (if remarking is enabled in the network egress policy).

Which of the following are entities of the Nokia 7750 SR on which you can NOT apply a network-queue policy? (Choose three)

A hierarchical scheduler policy with the shown parameters is configured at a service ingress. If the offered rate of each queue is 10Mbps, what is the operational PIR and CIR for queue 3?

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

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

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

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?

On the Nokia 7750 SR, what is a slope policy used for?

Which of the following statements regarding the default scheduler in the Nokia 7750 SR are TRUE? (Choose two)

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)

When deploying an Alcatel-Lucent MPLS network with QoS, how are the EXP bits set?

Which of the following are trusted boundaries, by default? (Choose two)

Without_______, a customer's high priority traffic can be dropped before its low priority traffic.

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

Which of the following are entities of the Alcatel-Lucent 7750 SR on which you can NOT apply a network-queue policy? (Choose three)

Traffic assigned to forwarding classes is placed into queues, while the contents of the queues are serviced in a controlled manner using____________.

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

Nokia Border Gateway Protocol

Nokia Multiprotocol Label Switching

Nokia Services Architecture

Nokia Virtual Private LAN Services

Nokia Virtual Private Routed Networks

Nokia Quality of Service

Nokia Multicast Protocols

Filters