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Cisco Quality of Service (QoS) Sample Questions:

1. Refer to the exhibit. Which three statements are true about the configuration? (Choose three.)
class-map class-1
match ip rtp 2024 1000
class-map class 2
match dscp 5 6 7
policy-map access-group-1-traffic
class class-1
shape peak 16000
class class-2
police 8000 1000
conform-action set-dscp-transmit 1
exceed-action set-dscp-transmit 0
violate-action drop
class class-default
fair-queue 16
queue-limit 20
interface fastethernet 0/0
service-policy output access-group1-traffic

A) IP traffic (DSCP 0) that is sent on fastethernet 0/0 will be subject to fair queuing.
B) IP traffic (DSCPs 1, 2, 3, and 4) that is sent on fastethernet 0/0 are considered to have a violate status and are dropped.
C) Traffic that is subject to shaping can burst up to 32,000 bps.
D) IP traffic (DSCPs 5, 6, and 7) that is sent on fastethernet 0/0 will be traffic policed.
E) RTP traffic (ports 2024 and 1000) that is sent on fastethernet 0/0 will be traffic shaped.
F) Traffic that is subject to policing will have the DCSP set to 0 if the rate exceeds 1000 bps.

2. DRAG DROP

3. What will be the peak shape rate based on the configuration that follows?
policy-map setpeak
class all-traffic
shape peak 32000

A) 80000 bps
B) 16000 bps
C) 48000 bps
D) 32000 bps
E) 64000 bps
F) 96000 bps

4. What is the purpose of using multiactions traffic policing?

A) so that class-based policing can mark at Layer 2 and Layer 3 at the same time
B) so that exceed traffic can be shaped and violate traffic can be policed
C) so that conform, exceed, and violate traffic can be marked with different CLPs
D) so that traffic can be policed using two separate rates
E) so that conform traffic from different flows can be marked with different DSCPs

5. According to the best practices, which statement is true as related to the QoS policy that should be implemented on the outbound provider (P) to provider (P) router link in a service provider network that is supporting both VoIP and data?

A) In the DiffServ model, ingress and egress QoS mechanisms are only required on the provider edge (PE) routers, so no QoS policy is needed on the P to P link.
B) CBWFQ and CB-WRED should be implemented on the P router egress to provide a maximum bandwidth guarantee for the VoIP traffic.
C) LLQ and CB-WRED should be implemented on the P router egress to support both VoIP and data traffic.
D) CBWFQ and CB-RTP header compression should be implemented on the P router egress to ensure minimum latency for VoIP traffic.

Solutions: