Cisco 642-642 - Quality of Service (QoS)

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Cisco 642-642 Exam Syllabus Topics:

Cisco Quality of Service (QoS) Sample Questions:

1. What are three reasons link efficiency mechanisms are deployed on WAN links? (Choose three.)

A) decrease delay
B) decrease propagation delay
C) decrease jitter
D) increase throughput
E) increase link speed

2. DRAG DROP

3. 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 interleave command on the s0/0 interface
C) the ppp multilink load-threshold 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

4. The show policy-map interface command output is showing too many random drops for the mission-critical traffic class. What can be changed to reduce the random drops?

A) Increase the WRED max-threshold value for the mission-critical traffic class.
B) Enable fair-queue within the mission-critical traffic class.
C) Decrease the queue-limit for the mission-critical traffic class.
D) Decrease the WRED drop probability denominator for the mission-critical traffic class.
E) Increase the WRED min-threshold value for the mission-critical traffic class.

5. This policy-map is applied to a 128-kbps serial interface in the output direction. Which set of additional commands within this policy-map will improve the link efficiency on the serial interface?
policy-map test
class voice
priority 25
class telnet
bandwidth remaining percent 20
class ftp
bandwidth remaining percent 30

A) class telnet
fair-queue
B) class telnet
compression header ip tcp
C) class voice
no priority 25
bandwidth percent remaining 25
D) class ftp
fair-queue
E) class ftp
compression header ip
F) class voice
compression header ip tcp

Solutions: