4A0-107 試験問題と解答 - 模擬練習 - 練習問題・模擬試験

Question No : 1
Which of the following statements BEST describes the IntServ model?

A.Has the ability to distinguish traffic in 32 different ways.
B.Uses the RSVP protocol to create microflows through a network.
C.Has the ability to manually configure foiwarding classes through a network.
D.Uses the RSVP protocol to create macroflows through a network.

正解:

Question No : 2
How does an IOM3 improve the queue usage over an IOM2 in an Nokia 7750 SR? (Choose two)

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.

正解:

Question No : 3
Click the exhibit button below.

Based on the configuration of the network policy (below), what will be the forwarding class associated with a MPLS encapsulated customer packet that arrives on a dotlQ encapsulated network port 1/1/4:1 on P1 with the following characteristics:
EXP value = 6
DSCP value = cs1
Dot1pvalue = 3

A.EF
B.H1
C.L1
D.H2
E.L2

正解:

Question No : 4
Which of the following statements regarding the default scheduler in the Nokia 7750 SR are TRUE? (Choose two)

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.

正解:

Question No : 5
Which of the following statements regarding scheduling are TRUE? (Choose two)

A.Scheduler policies cannot be children of an egress port-scheduler.
B.HQoS provides a static method of allocating scheduling resources to each queue and/or child.
C.Scheduler policies can be applied to the MDA to schedule network ingress traffic.
D.Every time a scheduler-policy is assigned to a SAP, a new hardware scheduler is created to service the SA
E.A scheduler applied to multiple SAPs within the same service will result in a single hardware scheduler operating across all SAPs within the service.

正解:

Question No : 6
Click the exhibit button below.
A network operator has configured a network-queue policy to map forwarding classes to queues, as shown in the exhibit below.

Based on the default scheduling behavior of the Nokia 7750 SR, in which order will packets be serviced?

A.All in-profile packets in round-robin, then all out-of-profile packets in biased round-robin.
B.In-profile EF packets, then in-profile H2 packets, then in-profile AF packets, then out-of-profile EF packets, then out-of-profile H2 and AF packets, and then out-of-profile BE packets.
C.In-profile EF, H2 and AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.
D.In-profile EF packets, then in-profile H2 and AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.
E.In-profile EF and H2 packets, then in-profile AF packets, then out-of-profile H2, AF and BE packets in biased round-robin.

正解:

Question No : 7
On the Nokia 7750 SR, what is the maximum number of queues that a single SAP-ingress policy can support in a VPLS?

A.16
B.8
C.32
D.48
E.56

正解:

Question No : 8
Which of the following statements are TRUE regarding the PE device in a QoS enabled network? (Choose two)

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.

正解:

Question No : 9
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).

A.TRUE
B.FALSE

正解:

Question No : 10
Which of the following rate-limiting approaches are used on the Nokia 7750 SR? (Choose two)

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.

正解:

Question No : 11
Click the exhibit button below.

Given the scheduler-policy (below), which of the following can be done to guarantee that the best-effort traffic receives its configured CIR value?

A.Change the CIR-level value for the best-effort queue to 8.
B.Do not change anything; it is already guaranteed to receive its CIR
C.Change the CIR-level value for the best-effort queue to 1.
D.Change the CIR-weight value of the AF queue to 0.

正解:

Question No : 12
Which of the following statements describe the operation of WRED on the Nokia 7750 SR? (Choose three)

A.WRED monitors the shared buffer space utilization over a period of time.
B.WRED disables the TCP slow-start congestion control mechanism.
C.WRED uses two configurable slopes for each buffer pool: a high slope and a low slope.
D.WRED uses the shared buffer utilization, instead of the individual queue depth, to get a better picture of the average resource utilization of the shared buffer space.
E.WRED polices the shared buffer pool and marks all packets above a certain rate as "discard eligible."

正解:

Question No : 13
Click the exhibit button below.

The service provider has both a VLL (epipe) service and a VPLS, as shown in the diagram below.
At router PE B, traffic arriving from both services will have the same network-queue policy applied.

A.TRUE
B.FALSE

正解:

Question No : 14
Which of the following are categories of forwarding classes on the Nokia 7750 SR? (Choose two)

A.Real-time
B.Assured
C.Non-conforming
D.High priority
E.In-profile

正解:

Question No : 15
In which policies, on the Nokia 7750 SR. is classification performed? (Choose three)

A.SAP-ingress policy
B.SAP-egress policy
C.IP-criteria policy
D.Network-queue policy
E.Slope policy
F.Network policy

正解:

Alcatel Lucent 4A0-107 問題練習