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Questions # 16:

Packets arrive at the VPRN SAP on PE1 with DSCP marking of all. According to the QoS policies applied at routers PE1, P, and PE2, what is the DSCP value of packets egressing router PE2? (All the SDPs are MPLS-encapsulated, and all interfaces are using their default trust states).

Question # 16

Options:
A.

af11

B.

af12

C.

af31

D.

af33

Questions # 17:

How many bits does DSCP use to provide QoS marking options?

Options:
A.

8

B.

16

C.

6

D.

4

E.

3

Questions # 18:

Which of the following is NOT one of the four elements in the Nokia 7750 SR QoS solution'

Options:
A.

Marking/Remarking

B.

Classification

C.

Encapsulation

D.

Scheduling

Questions # 19:

Which of the following statements about standalone pokers and CFHP policers is FALSE?

Options:
A.

A standalone policer has no parent arbiter, while a CFHP pohlicer has a parent arbiter.

B.

A standalone policer has a fixed PIR rate, while a CFHP poker's PIR rate can be dynamically adjusted by its parent arbiter.

C.

Both standalone and CFHP policers use the FIR bucket to gain access to their fair share of the available bandwidth.

D.

Both standalone and CFHP policers use a policer output queue to store packets before they are forwarded.

Questions # 20:

A default network policy is applied to all router interfaces associated with network ports.

Options:
A.

TRUE

B.

FALSE

Questions # 21:

Which of the following is NOT a benefit of using a spoke SDP in an H-VPLS design?

Options:
A.

Simplifies signaling.

B.

Reduces core's forwarding database size.

C.

Simplifies MDU configuration.

D.

Enables a scalable inter-domain solution.

Questions # 22:

In the image shown above, the network QoS policy is applied properly to a Nokia 77S0 SR acting as a transit Label Switch Router (LSR) for a given MPLS tunnel. A packet is received inside the MPLS tunnel with EXP=5, dotlp=0, and DSCP=EF. Which forwarding class is assigned to this packet?

Question # 22

Options:
A.

BE

B.

AF

C.

EF

D.

H1

Questions # 23:

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

Options:
A.

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

B.

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

C.

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

D.

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

E.

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

Questions # 24:

Which of the following about self-generated traffic QoS is TRUE?

Options:
A.

The DSCP marking stays ncl for all applications; only the internal forwarding class is manipulated across different applications.

B.

DSCP bits can be set per application, per routing instance.

C.

The internal forwarding class for self-generated traffic is set once and applied to the base router and all VPRN instances.

D.

Self-generated traffic can be marked at Layer 2 no matter what encapsulation is used on the network interfaces.

Questions # 25:

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

Options:
A.

WRED

B.

shapers

C.

schedulers

D.

markers

E.

weighted fair queues (WFQ)

Questions # 26:

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

Options:
A.

The slope-policy

B.

The SAP-ingress policy

C.

The SAP-egress policy

D.

The network-queue policy

E.

The scheduler-policy

Questions # 27:

If packets egressing a SAP do not match any criteria defined in the SAP-egress policy, which forwarding class will these packets be assigned to?

Options:
A.

The default forwarding class defined in the SAP-egress policy.

B.

The forwarding class inherited from network ingress classification.

C.

Best Effort.

D.

If there is no match, packets will be dropped.

Questions # 28:

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)

Options:
A.

CIR

B.

CIR level

C.

CIR weight

D.

Rate

E.

Level

F.

Weight

Questions # 29:

Which of the following rate-limiting approaches are used on the Alcatel-Lucent 7750 SR? (Choose two)

Options:
A.

Shapeless policing at SAP-ingress only.

B.

Shapeless policing at SAP-ingress and egress.

C.

Biased round robin queuing at ingress only.

D.

Soft shaping at all network interfaces.

E.

Soft shaping at network ingress only.

Questions # 30:

Click the exhibit button below. Given that the slope-policy (below) has been enabled and applied on a network port, which of the following statements are TRUE? (Choose three)

Question # 30

Options:
A.

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

B.

The time average factor of 0 will discard all packets arriving in the shared buffer pool.

C.

When the shared buffer utilization reaches 51%, in-profile packets might be dropped.

D.

The highest probability with which an out-of-profile packet can be dropped is 20%.

E.

When an in-profile packet arrives and the shared buffer utilization is at 69%, the packet will have approximately a 60% likelihood of being discarded.

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