CCNP- ONT #1

20 Questions | Total Attempts: 52

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CCNP Quizzes & Trivia

This test covers Cisco Voice over IP (VoIP) implementations.


Questions and Answers
  • 1. 
    Which one of the following is not a benefit of VoIP compared to traditional circuit-switchedtelephony?
    • A. 

      Consolidated network expenses

    • B. 

      Improved employee productivity

    • C. 

      Access to new communication devices

    • D. 

      Higher voice quality

  • 2. 
    Which one of the following is not considered a packet telephony device?
    • A. 

      IP phone

    • B. 

      Call agent

    • C. 

      PBX

    • D. 

      Gateway

  • 3. 
    Which one of the following is not an analog interface?
    • A. 

      FXO

    • B. 

      BRI

    • C. 

      FXS

    • D. 

      E&M

  • 4. 
    Which one of the following digital interface descriptions is incorrect?
    • A. 

      T1 CAS with 30 voice channels

    • B. 

      T1 CCS with 23 voice channels

    • C. 

      BRI with 2 voice channels

    • D. 

      E1 with 30 voice channels

  • 5. 
    Which one of the following is not one of the three stages of a phone call?
    • A. 

      Call setup

    • B. 

      Call maintenance

    • C. 

      Call teardown

    • D. 

      Call processing

  • 6. 
    Which one of the following is not a step in analog-to-digital signal conversion?
    • A. 

      Sampling

    • B. 

      Quantization

    • C. 

      Encoding

    • D. 

      Decompression

  • 7. 
    Based on the Nyquist theorem, what is the appropriate sampling rate for an analog voice signal with a maximum frequency of 4000 Hz?
    • A. 

      8800

    • B. 

      8000

    • C. 

      4000

    • D. 

      4400

  • 8. 
    Which of the following accurately describes the 8-bit encoding?
    • A. 

      1 polarity bit, 3 segment bits, 4 step bits

    • B. 

      1 polarity bit, 4 segment bits, 3 step bits

    • C. 

      4 polarity bits, 3 segment bits, 1 step bit

    • D. 

      3 polarity bits, 4 segment bits, 1 step bit

  • 9. 
    Which of the following codec descriptions is incorrect?
    • A. 

      G.711 PCM 64 Kbps

    • B. 

      G.726 ADPCM 8 Kbps

    • C. 

      G.728 LD-CELP 16 Kbps

    • D. 

      G.729 CS-ACELP 8 Kbps

  • 10. 
    Which of the following is not a telephony application that requires usage of a DSP?
    • A. 

      Voice termination

    • B. 

      Conferencing

    • C. 

      Packetization

    • D. 

      Transcoding

  • 11. 
    Which of the following is a false statement?
    • A. 

      Voice needs the reliability that TCP provides.

    • B. 

      Voice needs the reordering that RTP provides.

    • C. 

      C. Voice needs the time-stamping that RTP provides.

    • D. 

      Voice needs the multiplexing that UDP provides.

  • 12. 
    Which of the following correctly specifies the header sizes for RTP, UDP, and IP?
    • A. 

      8 bytes of RTP, 12 bytes of UDP, and 20 bytes of IP

    • B. 

      20 bytes of RTP, 12 bytes of UDP, and 8 bytes of IP

    • C. 

      8 bytes of RTP, 20 bytes of UDP, and 12 bytes of IP

    • D. 

      12 bytes of RTP, 8 bytes of UDP, and 20 bytes of IP

  • 13. 
    Which of the following is not a factor influencing VoIP media bandwidth?
    • A. 

      Packet rate

    • B. 

      Packetization size

    • C. 

      TCP overhead

    • D. 

      Tunneling or security overhead

  • 14. 
    If 30 ms of voice is packetized, what will the packet rate be?
    • A. 

      50 packets per second

    • B. 

      60 packets per second

    • C. 

      30 packets per second

    • D. 

      33.33 packets per second

  • 15. 
    With G.711 and a 20-ms packetization period, what will be the bandwidth requirement over Ethernet (basic Ethernet with no 802.1Q or any tunneling)?
    • A. 

      87.2 kbps

    • B. 

      80 kbps

    • C. 

      64 Kbps

    • D. 

      128 Kbps

  • 16. 
    With G.729 and 20 ms packetization period, what will be the bandwidth requirement over PPP if cRTP is used with no checksum?
    • A. 

      8 Kbps

    • B. 

      26.4 Kbps

    • C. 

      11.2 Kbps

    • D. 

      12 Kbps

  • 17. 
    Which of the following is not a factor in determining the amount of bandwidth that can be saved with VAD?
    • A. 

      Type of audio (one-way or two-way)

    • B. 

      Codec used

    • C. 

      Level of background noise

    • D. 

      Language and character of the speaker

  • 18. 
    Which of the following is not a voice gateway function on a Cisco router (ISR)?
    • A. 

      Connect traditional telephony devices

    • B. 

      Survivable Remote Site Telephony (SRST)

    • C. 

      CallManager Express

    • D. 

      Complete phone feature administration

  • 19. 
    Which of the following is not a Cisco Unified CallManager function?
    • A. 

      Converting analog signal to digital format

    • B. 

      Dial plan administration

    • C. 

      Signaling and device control

    • D. 

      Phone feature administration

  • 20. 
    Which of the following is not an enterprise IP Telephony deployment model?
    • A. 

      Single site

    • B. 

      Single site with clustering over WAN

    • C. 

      Multisite with either centralized or distributed call processing

    • D. 

      Clustering over WAN