Cisco CCIP 642-642

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Cisco Quality of Service (QoS) Sample Questions:

1. A major media company recently deployed a new converged network. The original network design used separate networks for graphics and video, interactive data, and voice. The company has been experiencing problems with voice traffic in the new converged network. Most of the time voice quality is perfectly acceptable. Periodically voice quality exhibits unacceptable choppy voice signals, and occasionally calls are dropped. At this time the company is not willing to simply add bandwidth to the network.
Which QoS solution would most likely help to resolve the problem?

A) Prioritize voice traffic as the highest priority to ensure that voice traffic is always serviced by the priority queue.
B) Use TCP header compression and LFI to reduce delays.
C) Use class-based weighted fair queuing to prioritize voice traffic with a higher weight than all other traffic.
D) Use advanced technologies to compress all video and graphics traffic on the network.

2. 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

3. HOTSPOT

4. Which two different traffic types have the most similar sensitivity to latency, jitter, and packet loss? (Choose two.)

A) streaming video
B) SQL transactions
C) voice signaling
D) voice
E) peer-to-peer file sharing
F) video conferencing

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

Solutions:

Question # 1 Answer: A

Question # 2 Answer: D

Question # 3 Answer: Only visible for members

Question # 4 Answer: D,F

Question # 5 Answer: E