Which of the following statements about marking packets is TRUE?

Packets corresponding to a layer-3 service can be pre-marked on network-ingress.

Packets corresponding to a layer-2 service can be pre-marked on SAP-ingress.

Packets corresponding to a layer-2 service can be pre-marked on network-ingress.

Packets corresponding to a layer-3 service can be pre-marked on SAP-ingress.

Packets corresponding to a layer-3 service can be pre-marked on network-ingress.

Which of the following statements about the QoS treatment of self-generated traffic in the Nokia 7750 SR is FALSE?

The self-generated packets will be marked with a default DSCP value.

All self-generated traffic is assigned into forwarding class NC by default.

Ingress self-generated traffic is stored in CPM queues and egress self-generated traffic is stored in IOM queues.

The self-generated packets will be marked with a default DSCP value.

The self-generated packets will be marked with default EXP bits.

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

It will be classified into forwarding class BE and stored in queue 1.

It will be classified into forwarding class BE and stored in queue 8.

It will be classified into forwarding class NC and stored in queue 1.

It will be classified into forwarding class NC and stored in queue 8.

Where is a QoS network queue policy applied?

Egress MDA or ingress network interface

Egress network interface or ingress MDA

How does a shaper rate-limit a traffic stream?

Packets with an average arrival rate higher than PIR are buffered for future processing; conforming packets are immediately forwarded.

Packets that arrive in a burst are immediately dropped; packets that arrive with the proper in between space are immediately.

Packets are buffered on arrival and are forwarded at an average rate conforming with PIR, typically, with a reduced burstiness.

Packets with an average arrival rate higher than PIR are immediately dropped; conforming packets are forwarded at the same rate at which they arrive.

Packets with an average arrival rate higher than PIR are buffered for future processing; conforming packets are immediately forwarded.

Which action does the packet remarking process perform?

It sets the TOS, DSCP, EXP, or Dot1p field based on classification criteria

It determines the packet's forwarding class based on classification criteria

It modifies the current packet's forwarding class to indicate promotion or demotion

It sets the TOS, DSCP, EXP, or Dot1p field based on classification criteria

It modifies the current TOS, DSCP, EXP, or Dot1p marking to indicate promotion or demotion

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

DiffServ is more scalable it treats traffic streams as aggregates.

DiffServ reserves resources dynamically using the RSVP protocol.

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

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

DiffServ is more scalable it treats traffic streams as aggregates.

Which of the following statements defines the committed information rate?

It is the minimum rate at which packets may be forwarded out of a queue.

It is the rate at which a traffic stream is offered to a queue.

It is the rate at which packets are forwarded out of a queue.

It is the minimum rate at which packets may be forwarded out of a queue.

It is the maximum rate at which packets may be forwarded out of a queue.

Why are the four QoS steps (classification, queuing, scheduling, and marking/remarking) executed twice for every packet entering a 7750 SR router?

Once before going through the switching fabric, and once more before going onto the egress port.

Once before going through each of the redundant switching fabrics.

To protect against failure of either ingress or egress card.

Once before going through the switching fabric, and once more before going onto the egress port.

Once to decide if the packet is in-profile or out-of-profile, and once more to process the packet according to its profile.

What feature makes a traffic stream real-time?

Time between packets remains unchanged and end-to-end delay is kept to a minimum.

Its rate fluctuates rapidly with time.

Its bandwidth requirements are high.

Time between packets remains unchanged and end-to-end delay is kept to a minimum.

All packets received are guaranteed to be delivered to the destination.

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?

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

The forwarding class inherited from network ingress classification.

If there is no match, packets will be dropped.

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

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

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

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

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

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

A SAP-ingress policy is configured so that ping traffic is classified as FC L1 and mapped to queue 3; however, all traffic is placed in queue 1. What is the most probable reason for this?

The SAP-ingress policy has not been applied to the SAP.

The default forwarding class for ICMP traffic is BE and cannot be changed.

Queue 3 has no PIR or CIR configured, and thus cannot hold any packets.

The SAP-ingress policy has not been applied to the SAP.

Which of the following is an advantage of using queue-groups on a service SAP?

It allows a set of queues to be shared among multiple SAPs.

It more scalable than using policers.

It allows a separate set of queues/policers for each VLAN on a port.

It allows a set of queues to be shared among multiple SAPs.

By default, how does a hybrid port on a Nokia 7750 SR share its allocated buffer space between access and network pools?

Buffer space is allocated 50% for access pools and 50% for network pools.

All buffer space is initially allocated to access pools, and some of it is reallocated to network pools if network interfaces are configured on it.

All buffer space is initially allocated to network pools, and some of it is reallocated to access pools if service SAPs are configured on it.

Buffer space is allocated 50% for access pools and 50% for network pools.

Buffer space is allocated 25% for access pools and 75% for network pools.

Which action should be taken to ensure that packets do not use the shared buffer space when put into a queue?

Set the queue's MBS equal to the CBS

Set the queue's high-priority-only equal to the MBS

Set the queue's high-priority-only to 0

Which of the following about the process of queuing self-generated traffic in the Nokia 7750 SR is TRUE?

Ingress traffic is stored in CPM queues and egress traffic is stored in IOM queues.

Ingress traffic is stored in IOM queues and egress traffic is stored in CPM queues.

Ingress traffic is stored in CPM queues and egress traffic is stored in IOM queues.

It is always stored in CPM queues.

It is always stored in IOM queues.

Refer to the exhibit. According to the configuration shown above, which of the following about the classification and marking of self- generated BGP traffic is TRUE?

It will be marked as DSCP NC1 and classified into forwarding class AF.

It will be marked as DSCP BE and classified into forwarding class BE.

It will be marked as DSCP NC1 and classified into forwarding class BE.

It will be marked as DSCP NC1 and classified into forwarding class NC.

It will be marked as DSCP NC1 and classified into forwarding class AF.

Which of the following features of the Nokia 7750 SR prevents Head of Line blocking in the default queuing model?

For each unicast queue in a SAP-ingress or network-queue policy, there is a separate hardware queue for each destination FFPC.

Every forwarding class can be associated with its own queue without sharing with other forwarding classes.

A 3-tier scheduling policy can be applied at SAP-ingress/SAP-egress.

For each unicast queue in a SAP-ingress or network-queue policy, there is a separate hardware queue for each destination FFPC.

Policing can be deployed instead of queuing at ingress.

A queue-group template can only contain policers (no queues) when applied under which conditions?

When applied at the FP (Forwarding Pass) level for access ingress

When applied at the FP (Forwarding Path) level for access egress

When applied at an access port for ingress or egress

When applied at the FP (Forwarding Pass) level for access ingress

When applied at the port level for network egress

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