How to Pass the Nokia 4A0-107 Exam: Comprehensive Nokia Quality of Service Guide and Tips

On all ports on the Nokia 7750 SR.

At the junction of high-speed to low-speed links or at places of traffic aggregation.

At the junction of low-speed to high-speed links or at places of traffic aggregation.

On low-speed WAN links.

Nowhere. Shaping is only performed in hardware and serviced in a round-robin.

The first 3 bits of the DSCP value are copied directly into the EXP field on the first network egress.

The EXP bits are set on the first network egress, based on a combination of the SAP-ingress classification and the network policy applied.

The 3 priority bits are copied directly from the dot1p header into the EXP field of the first MPLS header.

The EXP bits are set based on a default map that translates DSCP codes into internal forwarding classes on SAP-ingress.

All forwarded packets will be in-profile

Packets forwarded above CIR will be marked out-of-profile and the rest will be in-profile

Excess packets that arrive within a burst larger than CBS will be forwarded as out-of-profile

All forwarded packets will be out-of-profile

FC H1, high

FCH1, low

FCAF, high

FCAF, low

IP Precedence

Dot1p

Forwarding class

EXP

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.

All AF traffic will be marked "in-profile" at the SAP-ingress.

All TCP traffic will be mapped to forwarding class EF.

UDP traffic is placed in queue 3 while ICMP traffic is placed in queue 5.

EF traffic will receive higher scheduling priority than H2 traffic.

Traffic that does not match any of the IP criteria will be placed in queue 3.

SAP-ingress only

SAP-egress only

SAP-ingress and SAP-egress

Network ingress

Network egress

1

2

3

4

5

8

The priority (low/high) to be assigned to the packets.

The profile (in/out) to be assigned to the packets.

The queues to be assigned to the forwarding classes.

The markings to be marked on the packets.