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Cisco 642-642 Exam Syllabus Topics:

Cisco Quality of Service (QoS) Sample Questions:

1. Which command is typically applied to the voice traffic class within a policy-map?

A) random-detect dscp-based
B) shape peak {bps}
C) shape average {bps}
D) bandwidth {kbps}
E) compress header ip rtp
F) fair-queue

2. Which QoS mechanism adds IP Precedence information for prefixes into the FIB table?

A) QoS pre-classify
B) Class-Based WRED
C) Class-Based Marking
D) QPPB
E) AutoQoS
F) LLQ

3. Which three characteristics are drawbacks to the use of a best-effort with over-provisioning backbone design? (Choose three.)

A) It requires complex QoS mechanisms at the network edge.
B) Unplanned network failures can cause unexpected congestion in the network.
C) It requires complex QoS mechanisms at the network core.
D) Denial of Service attacks on one service can affect all network traffic.
E) The design uses a different over-provisioning ratio for the different traffic classes.
F) The design costs more to implement than a DiffServ backbone.

4. DRAG DROP
Drop

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

Solutions: