CCNP ONT Quick Reference Sheets: Exam 642-845 (Digital Short Cut)

s a final exam preparation tool, the CCNP ONT Quick Reference Sheets provide a concise review of all objectives on the new CCNP ONT exam (642-845). This digital Short Cut provides you with detailed, graphical-based information, highlighting only the key topics in cram-style format.

With this document as your guide, you will review topics on voice-over-IP (VoIP) networking, quality of service (QoS), IP QoS mechanisms for implementing the DiffServ QoS model, AutoQoS, wireless security, and basic wireless management.

These fact-filled Quick Reference Sheets allow you to get all-important information at a glance, helping you to focus your study on areas of weakness and to enhance memory retention of essential exam concepts.

With this document as your guide, you will review topics on implementing a voice-over-IP (VoIP) network, implementing quality of service (QoS) on converged networks, and implementing the DiffServ QoS model with specific IP QoS mechanisms, AutoQoS, wireless security, and basic wireless management.

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QUESTION 49:
You want to decrease the overall delay of voice packets in the Certkiller converged
network. Which three statements about end-to-end delay are true? (Select three)
A. End-to-end delay is the sum of propagation delays, processing delays, serialization
delays, and queuing delays.
B. Coast-to-coast end-to-end delay over an optical link is about 20 ms.
C. Propagation delay is the time it takes to transmit a packet and is measured in
bits-per-second (bps).
D. Propagation and serialization delays are related to the media.
E. Processing delay depends on various factors, which include CPU speed, CPU
utilization, IP switching mode, and router architecture.
F. Serialization delay is the time it takes for a router to take the packet from an input
interface and put it into the output queue of the output interface.

QUESTION 50:
Exhibit:
Study the exhibit carefully. A router has a 256 kbps Frame Relay circuit connected
to interface serial 0/0. As a large FTP packet is being placed into the hardware
transmit queue of interface serial 0/0, a voice packet is placed into the priority
queue of that interface. How, and in what order, will the packets be transmitted?
A. The voice packet will be transmitted first, followed by the fragmented FTP packet.
B. The FTP packet will be fragmented and the voice packet will be interleaved.
C. The voice packet will be transmitted first, followed by the FTP packet in its entirety.
D. The FTP packet will be transmitted first in its entirety, followed by the voice packet.
E. None of the above.

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