Question 1

How does a shaper rate-limit a traffic stream?

Accepted Answer

A)  Packets that arrive in a burst are immediately dropped; packets that arrive with the proper in between space are immediately. 
B)  Packets are buffered on arrival and are forwarded at an average rate conforming with PIR, typically, with a reduced burstiness. 
C)  Packets with an average arrival rate higher than PIR are immediately dropped; conforming packets are forwarded at the same rate at which they arrive. 
D)  Packets with an average arrival rate higher than PIR are buffered for future processing; conforming packets are immediately forwarded. 
A)  Packets that arrive in a burst are immediately dropped; packets that arrive with the proper in between space are immediately. 
B)  Packets are buffered on arrival and are forwarded at an average rate conforming with PIR, typically, with a reduced burstiness. 
C)  Packets with an average arrival rate higher than PIR are immediately dropped; conforming packets are forwarded at the same rate at which they arrive. 
D)  Packets with an average arrival rate higher than PIR are buffered for future processing; conforming packets are immediately forwarded.

Question 2

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

Accepted Answer

A)  TCP port numbers 
B)  LSP EXP 
C)  DSCP 
D)  Source and destination IP addresses 
E)  Dot1p priority 
A)  TCP port numbers 
B)  LSP EXP 
C)  DSCP 
D)  Source and destination IP addresses 
E)  Dot1p priority

Question 3

Individual application streams are considered microflows, whereas __________ are considered macroflows.

Accepted Answer

A)  SAPs 
B)  SDPs 
C)  Services 
D)  Queues 
E)  Schedulers
F) Forwarding classes 
A)  SAPs 
B)  SDPs 
C)  Services 
D)  Queues 
E)  Schedulers
F) Forwarding classes

Question 4

Which of the following statements are TRUE regarding the building of a QoS-enabled network? (Choose two)

Accepted Answer

A)  It is important that all packets are classified in the same way at all SAP-ingress points. 
B)  Once a packet is classified to a forwarding class, it cannot change across the network. 
C)  Packet enters a node will be treated as per the local hop's configured policy. 
D)  Native IP packets entering a network port will be marked at the first network egress by default 
E)  Native IP packets entering a network port will not be marked at the first network egress by default.
F) Native IP packets entering a network port will be marked at the first network egress, regardless of the re-marking configuration. 
A)  It is important that all packets are classified in the same way at all SAP-ingress points. 
B)  Once a packet is classified to a forwarding class, it cannot change across the network. 
C)  Packet enters a node will be treated as per the local hop's configured policy. 
D)  Native IP packets entering a network port will be marked at the first network egress by default 
E)  Native IP packets entering a network port will not be marked at the first network egress by default.
F) Native IP packets entering a network port will be marked at the first network egress, regardless of the re-marking configuration.

Question 5

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

Accepted Answer

A)  A queue will be serviced as expedited if all of the forwarding classes mapped to it are expedited, regardless of its configured type. 
B)  A queue will be serviced as best-effort if all of the forwarding classes mapped to it are best-effort, regardless of its configured type. 
C)  A queue will be serviced as expedited if at least one of the forwarding classes mapped to it is expedited, regardless of its configured type. 
D)  A queue will be serviced as expedited if its type is configured as expedited, regardless of the forwarding classes mapped to it. 
A)  A queue will be serviced as expedited if all of the forwarding classes mapped to it are expedited, regardless of its configured type. 
B)  A queue will be serviced as best-effort if all of the forwarding classes mapped to it are best-effort, regardless of its configured type. 
C)  A queue will be serviced as expedited if at least one of the forwarding classes mapped to it is expedited, regardless of its configured type. 
D)  A queue will be serviced as expedited if its type is configured as expedited, regardless of the forwarding classes mapped to it.

Question 6

According to the configurations shown, which of the following statements about the classification and queuing of self-generated OSPF traffic is TRUE?

Accepted Answer

A)  It will be classified into forwarding class BE and stored in queue 1. 
B)  It will be classified into forwarding class BE and stored in queue 8. 
C)  It will be classified into forwarding class NC and stored in queue 1. 
D)  It will be classified into forwarding class NC and stored in queue 8. 
A)  It will be classified into forwarding class BE and stored in queue 1. 
B)  It will be classified into forwarding class BE and stored in queue 8. 
C)  It will be classified into forwarding class NC and stored in queue 1. 
D)  It will be classified into forwarding class NC and stored in queue 8.

Question 7

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

Accepted Answer

A)  All out-of-profile traffic will be dropped before that of any in-profile traffic. 
B)  The discard probability slope of an in-profile traffic is steeper than that of an out-of-profile traffic. 
C)  When the shared buffer utilization reaches 55%, both in-profile and out-of-profile packets may be dropped. 
D)  The maximum probability with which an out-of-profile packet can be dropped is higher than that of an in-profile packet. 
E)  When the shared buffer utilization is at 61%, only in-profile packets are currently in the shared buffer pool. 
A)  All out-of-profile traffic will be dropped before that of any in-profile traffic. 
B)  The discard probability slope of an in-profile traffic is steeper than that of an out-of-profile traffic. 
C)  When the shared buffer utilization reaches 55%, both in-profile and out-of-profile packets may be dropped. 
D)  The maximum probability with which an out-of-profile packet can be dropped is higher than that of an in-profile packet. 
E)  When the shared buffer utilization is at 61%, only in-profile packets are currently in the shared buffer pool.

Question 8

Which action does the packet remarking process perform?

Accepted Answer

A)  It determines the packet's forwarding class based on classification criteria 
B)  It modifies the current packet's forwarding class to indicate promotion or demotion 
C)  It sets the TOS, DSCP, EXP, or Dot1p field based on classification criteria 
D)  It modifies the current TOS, DSCP, EXP, or Dot1p marking to indicate promotion or demotion 
A)  It determines the packet's forwarding class based on classification criteria 
B)  It modifies the current packet's forwarding class to indicate promotion or demotion 
C)  It sets the TOS, DSCP, EXP, or Dot1p field based on classification criteria 
D)  It modifies the current TOS, DSCP, EXP, or Dot1p marking to indicate promotion or demotion

Question 9

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

A)  During the allocation of within-CIR bandwidth. 
B)  During the allocation of above-CIR bandwidth. 
C)  During the allocation of both within-CIR and above-CIR bandwidth. 
D)  The port scheduler does not use the level of a child for making bandwidth allocation decisions 
A)  During the allocation of within-CIR bandwidth. 
B)  During the allocation of above-CIR bandwidth. 
C)  During the allocation of both within-CIR and above-CIR bandwidth. 
D)  The port scheduler does not use the level of a child for making bandwidth allocation decisions

Question 10

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

Accepted Answer

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

Question 11

How does an IOM3 improve the queue usage over an IOM2 in a Nokia 7750 SR? (Choose two)

Accepted Answer

A)  The IOM3 adds more memory to both forwarding complexes which increases the total number of queues available. 
B)  The IOM3 only contains a single forwarding complex which reduces the number of queues used. 
C)  The IOM3 allows multiple forwarding classes to be assigned to a single queue. 
D)  The IOM3 allows queues to be dynamically allocated between ingress and egress. 
E)  The IOM3 has a larger CPU capable of tracking active hardware queue utilization and adjusting memory allocation accordingly. 
A)  The IOM3 adds more memory to both forwarding complexes which increases the total number of queues available. 
B)  The IOM3 only contains a single forwarding complex which reduces the number of queues used. 
C)  The IOM3 allows multiple forwarding classes to be assigned to a single queue. 
D)  The IOM3 allows queues to be dynamically allocated between ingress and egress. 
E)  The IOM3 has a larger CPU capable of tracking active hardware queue utilization and adjusting memory allocation accordingly.

Question 12

Click the exhibit button below. A partial SAP-ingress policy configuration is shown below. A UDP video stream is sent to a PC with IP address 192.168.1.100. Given the SAP-ingress policy, to which forwarding class is the traffic matched?

Accepted Answer

A)  AF 
B)  EF 
C)  H2 
D)  H1 
E)  BE 
A)  AF 
B)  EF 
C)  H2 
D)  H1 
E)  BE

Question 13

Which of the following statements about the DiffServ and IntServ QoS models is FALSE?

Accepted Answer

A)  IntServ uses a protocol like RSVP to provide QoS guarantees on a per-flow basis. 
B)  DiffServ groups multiple microflows into bigger streams called macro flows. 
C)  Intserv requires that network routers allocate resources for thousands of individual flows. 
D)  Diffserv classifies packets into forwarding classes only at the first network hop. 
A)  IntServ uses a protocol like RSVP to provide QoS guarantees on a per-flow basis. 
B)  DiffServ groups multiple microflows into bigger streams called macro flows. 
C)  Intserv requires that network routers allocate resources for thousands of individual flows. 
D)  Diffserv classifies packets into forwarding classes only at the first network hop.

Question 14

According to the SAP-ingress QoS policy shown, which packets have a higher priority to enter queue 2?

Accepted Answer

A)  Packets marked with dscp = af33 
B)  Packets marked with dot1p = 4 
C)  All packets mapped to queue 2 have the same priority to enter this queue. 
D)  There are no packets mapped to queue 2. 
A)  Packets marked with dscp = af33 
B)  Packets marked with dot1p = 4 
C)  All packets mapped to queue 2 have the same priority to enter this queue. 
D)  There are no packets mapped to queue 2.

Question 15

Which of the following statements are TRUE regarding the PE device in a QoS enabled network? (Choose two)

Accepted Answer

A)  A device that provides no differentiation between customer traffic flows. 
B)  A device that classifies and marks customer traffic. 
C)  A device that uses MPLS EXP bits to differentiate between traffic flows. 
D)  A device that creates macroflows towards the core from multiple customer sites. 
E)  A device that passes macroflows while optionally changing QoS markings. 
A)  A device that provides no differentiation between customer traffic flows. 
B)  A device that classifies and marks customer traffic. 
C)  A device that uses MPLS EXP bits to differentiate between traffic flows. 
D)  A device that creates macroflows towards the core from multiple customer sites. 
E)  A device that passes macroflows while optionally changing QoS markings.

Question 16

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)

Accepted Answer

A)  CIR 
B)  CIR level 
C)  CIR weight 
D)  Rate 
E)  Level
F) Weight 
A)  CIR 
B)  CIR level 
C)  CIR weight 
D)  Rate 
E)  Level
F) Weight

Question 17

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

Accepted Answer

A)  Ensure that traffic flows conform to their traffic profile. 
B)  Log violations of metered traffic flows exceeding the CIR value set on the entity across which the traffic is moving. 
C)  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. 
D)  Minimize packet loss and reduce end to end latency. 
E)  Ensure that variable latencies do not cluster short bursts of originally conforming packets and render them nonconforming. 
A)  Ensure that traffic flows conform to their traffic profile. 
B)  Log violations of metered traffic flows exceeding the CIR value set on the entity across which the traffic is moving. 
C)  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. 
D)  Minimize packet loss and reduce end to end latency. 
E)  Ensure that variable latencies do not cluster short bursts of originally conforming packets and render them nonconforming.

Question 18

On the Nokia 7750 SR, which of the following QoS-related policies can be configured on a SAP? (Choose three)

Accepted Answer

A)  The slope-policy 
B)  The SAP-ingress policy 
C)  The SAP-egress policy 
D)  The network-queue policy 
E)  The scheduler-policy 
A)  The slope-policy 
B)  The SAP-ingress policy 
C)  The SAP-egress policy 
D)  The network-queue policy 
E)  The scheduler-policy

Question 19

If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

Accepted Answer

A) True 
 B)False

Question 20

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

A)  ToS 
B)  DSCP 
C)  PREC 
D)  EXP 
A)  ToS 
B)  DSCP 
C)  PREC 
D)  EXP

How does a shaper rate-limit a traffic stream?

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

Individual application streams are considered microflows, whereas __________ are considered macroflows.

Which of the following statements are TRUE regarding the building of a QoS-enabled network? (Choose two)

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

According to the configurations shown, which of the following statements about the classification and queuing of self-generated OSPF traffic is TRUE?

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

Which action does the packet remarking process perform?

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

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

How does an IOM3 improve the queue usage over an IOM2 in a Nokia 7750 SR? (Choose two)

Click the exhibit button below. A partial SAP-ingress policy configuration is shown below. A UDP video stream is sent to a PC with IP address 192.168.1.100. Given the SAP-ingress policy, to which forwarding class is the traffic matched?

Which of the following statements about the DiffServ and IntServ QoS models is FALSE?

According to the SAP-ingress QoS policy shown, which packets have a higher priority to enter queue 2?

Which of the following statements are TRUE regarding the PE device in a QoS enabled network? (Choose two)

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)

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

On the Nokia 7750 SR, which of the following QoS-related policies can be configured on a SAP? (Choose three)

If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

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?

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

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Exam 1: Nokia Scalable IP Networks

How does a shaper rate-limit a traffic stream?

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

Individual application streams are considered microflows, whereas __________ are considered macroflows.

Which of the following statements are TRUE regarding the building of a QoS-enabled network? (Choose two)

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

According to the configurations shown, which of the following statements about the classification and queuing of self-generated OSPF traffic is TRUE?

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

Which action does the packet remarking process perform?

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

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

How does an IOM3 improve the queue usage over an IOM2 in a Nokia 7750 SR? (Choose two)

Click the exhibit button below. A partial SAP-ingress policy configuration is shown below. A UDP video stream is sent to a PC with IP address 192.168.1.100. Given the SAP-ingress policy, to which forwarding class is the traffic matched?

Which of the following statements about the DiffServ and IntServ QoS models is FALSE?

According to the SAP-ingress QoS policy shown, which packets have a higher priority to enter queue 2?

Which of the following statements are TRUE regarding the PE device in a QoS enabled network? (Choose two)

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)

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

On the Nokia 7750 SR, which of the following QoS-related policies can be configured on a SAP? (Choose three)

If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

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?

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