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Cisco Quality of Service (QoS) Sample Questions:

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

2. Which QoS mechanism calculates the mean queue depth to determine its operation?

A) LLQ/CBWFQ
B) class-based policing
C) WFQ
D) class-based shaping
E) WRED

3. In a managed CE scenario, the customer's network is supporting VoIP and bulk file transfers. According to the best practices, which QoS mechanisms should be applied on the WAN edge CEPE 56-kbps Frame Relay link on the CE outbound direction?

A) WRR, FRTS, FRF.12, and CB-RTP header compression
B) LLQ, CB-WRED, CB-Policing, and CB-TCP and CB-RTP header compressions
C) WRR, CB-WRED, CB-Marking, FRF.12, and CB-RTP header compression
D) LLQ, CB-WRED, CB-Marking, FRTS, FRF.12, and CB-RTP header compression
E) CBWFQ, FRTS, FRF.12, and CB-RTP header compression
F) CBWFQ, CB-WRED, CB-Marking, CB-Policing, and FRTS

4. Which mechanism is used for the prioritizing, protection, and isolation of traffic based on marking?

A) metering
B) shaping
C) congestion management
D) congestion avoidance
E) policing
F) classification and marking

5. Switch port fa0/2 has been configured to connect an IP phone with an attached PC. Given the set of commands shown below, where does the trust boundary lie?
interface fa0/2 mls qos trust cos mls qos trust device cisco-phone switchport voice vlan 112

A) between the IP phone and the switch
B) between the PC port and the LAN port on the IP phone
C) between the access layer switch and the distribution layer switch
D) between the IP phone and the PC

Solutions: