4A0-107 Online Practice Questions and Answers

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

A. SAPs

B. SDPs

C. Services

D. Queues

E. Schedulers

F. Forwarding classes

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

A. 512 MB ingress, 512 MB egress

B. 256 MB ingress, 256 MB egress

C. 1 GB dynamically allocated between ingress and egress.

D. 768 MB dynamically allocated between ingress and egress.

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

What is the maximum number of forwarding subclasses a forwarding class can have?

A. 3

B. 64

C. 72

D. 16

E. 56

Which of the following fields can be marked or remarked for frames belonging to a Layer 2 service?

A. DSCP

B. PREC

C. Dot1p

D. ToS

E. Q-in-Q

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.

Which of the following fields is in the MPLS header?

A. 802.1p bits

B. Precedence

C. DSCP

D. EXP

Which of the following statements about queue modes, and profile marking of packets when leaving a queue is FALSE?

A. Profile-mode and priority-mode queues can only be configured on SAP ingress.

B. For network egress, egress re-classification can change the profile marked at ingress.

C. For SAP egress, the profile marked at ingress may change based on the scheduling loop.

D. For network ingress, the network policy can classify the packet as either in-profile, or out-of-profile.

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

According to the SAP-egress policy configured and applied, which queue will forwarding class AF's traffic use?

A. Policer 2 on the queue-group Q-Group1 instance 1.

B. Policer 1 on the queue-group Q-Group1 instance 1.

C. The default policer 1.

D. AF traffic is dropped.

Which of the following statements about configuring a hierarchical scheduler policy on a SAP is FALSE?

A. Several Tier 1, Tier 2, and Tier 3 schedulers can be defined within a policy.

B. A queue's parent scheduler must be a Tier-3 scheduler.

C. The parent must have a higher level in the hierarchy.

D. If no parent is configured, the queue/scheduler is considered orphaned.

How does a shaper rate-limit a traffic stream?

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.

Which of the following statements describes an advantage of the DiffServ QoS model over the IntServ QoS model?

A. DiffServ reserves resources dynamically using the RSVP protocol.

B. DiffServ only requires packets to be classified into forwarding classes at the first network hop.

C. DiffServ provides granular differentiation and superior fairness because it processes traffic streams individually.

D. DiffServ is more scalable it treats traffic streams as aggregates.

In a Nokia 7750 SR, which of the following QoS policies CANNOT include packet classification criteria?

A. SAP-ingress

B. SAP-egress

C. Network-queue

D. Network

Which of the following statements about behavior aggregate classification is TRUE?

A. It sets both the forwarding class and the packet's dot1p, lsp-exp, precedence, or dscp field to the same value.

B. It groups all packets together into a single aggregate stream, and gives all packets the same treatment.

C. It copies the three most significant bits in the packet's dscp field into the forwarding class.

D. It assigns a forwarding class based on the packet's dot1p, lsp-exp, precedence, or dscp value.

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

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.