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Cisco Quality of Service (QoS) Sample Questions:

1. Based on the following Cisco Catalyst 2950 Series switch configurations, which additional command will enable these actions?
Traffic marked with a CoS of 6 or 7 will be serviced by the priority queue.
Traffic marked with a CoS of 0, 1, or 2 will have a 20-percent weight when serviced by the wrr queue.
Traffic marked with a CoS of 4 will have a 30-percent weight when serviced by the wrr queue.
Traffic marked with a CoS of 3 or 5 will have a 50-percent weight when serviced by the wrr queue.
Catalyst 2950 partial configuration:
no wrr-queue cos-map
wrr-queue cos-map 1 0 1 2
wrr-queue cos-map 2 4
wrr-queue cos-map 3 3 5
wrr-queue cos-map 4 6 7

A) wrr-queue bandwidth 15 25 10 1
B) wrr-queue bandwidth 15 25 10 0
C) wrr-queue bandwidth 1 10 15 25
D) wrr-queue bandwidth 1 20 30 50
E) wrr-queue bandwidth 10 15 25 0

2. Which command is needed to correct the following configurations in order to enable ppp multilink
LFI on the s0/0 interface?
interface Serial0/0
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
no fair-queue
ppp multilink
multilink-group 2001100114
!
interface Multilink2001100114
bandwidth 384
ip address 10.1.1.1 255.255.255.0
service-policy output AutoQoS-Policy-UnTrust
ppp multilink
ppp multilink fragment-delay 10
ppp multilink interleave

A) the multilink-group 2001100114 command on the Multilink2001100114 interface
B) the ppp multilink load-threshold command on the s0/0 interface
C) the ppp multilink interleave command on the s0/0 interface
D) the ppp multilink load-threshold command on the Multilink2001100114 interface
E) the no ip address command on the s0/0 interface

3. What are two errors in this policy-map configuration? (Choose two.)
policy-map test
class voice
priority 64
class bulk
bandwidth percent 20
fair-queue
class interactive
bandwidth percent remaining 10
fair-queue
class class-default
fair-queue

A) The voice traffic class should have the no fair-queue command.
B) WFQ cannot be configured for the class-default traffic class.
C) The priority command cannot be used with the bandwidth command within the same policy-map.
D) WFQ cannot be configured for the bulk and interactive traffic classes.
E) The bandwidth units for the bulk and interactive traffic classes are inconsistent.
F) The bandwidth command is missing for the class-default traffic class.

4. To determine the bandwidth requirement for each VoIP call, not including Layer 2 overhead, how much bandwidth per call should be added to account for the voice signaling traffic?

A) 20 bps
B) 150 bps
C) 640 bps
D) 480 bps
E) 240 bps
F) 40 bps

5. In which two locations is the qos pre-classify command applied to support QoS preclassification over an IPSec/GRE tunnel? (Choose two.)

A) the tunnel interface
B) the class-map
C) the crypto map
D) the policy-map
E) the physical interface

Solutions: