Top 50+ CCNA Voice Interview Questions | Cisco VoIP Interview Questions

by | May 26, 2017 | CCNA | 0 comments

Top Interview Questions for Cisco VoIP:

  1. Explain Cisco IP Phone boot up process?
  2. Which transport layer protocols are used for VoIP audio and video payload?
  3. What is RTP in case of VoIP? Which layer of OSI model does it work on?
  4. What is RTCP and what is its use?
  5. What is codec and DSP?
  6. What are the different versions of PVDM?
  7. What is Cisco FLP?
  8. What are the two POE methods?
  9. What is 802.3af and 802.3at?
  10. Why is it recommended to use a separate Vlan for IP Phones?
  11. What is option 150 and option 66 in DHCP?
  12. Explain Cisco UC Architecture?
  13. What is CUCM Cluster?
  14. What are Network Services and Feature Services? What is the difference between them?
  15. What is ANI and DNIS?
  16. Explain the process of signaling for call between two phones registered on a CME where all three devices are connected on the same switch.
  17. What is FXO and FXS?
  18. What is T1 and E1? How many D and B channels do they have in case of ISDN?
  19. What is CAS and CCS?
  20. Explain Q.931 and its use.
  21. What is Dial-peer?
  22. What are the matching criteria for incoming dial-peers and outgoing dial-peers in their order of preference?
  23. What are user facing features?
  24. What is Extension Mobility?
  25. What is Call Park?
  26. What is PLAR?
  27. What is ISDN and Q.931?
  28. What is the use of NTP?
  29. What is BAT in case of CUCM?
  30. What is the difference between phone button template and soft-key template?
  31. What is the difference between LDAP synchronization and LDAP Authentication?
  32. Explain various ways in which Cisco unified communication systems can be deployed?
  33. What is line group in CUCM?
  34. What are the different ways in which we can add phones in CUCM?
  35. Which signaling protocols can be used for integration between CUCM and CUC?
  36. What are the various ways in which we can add users in CUCM?
  37. What is Mobile Voice Access and Unified mobility?
  38. What are the different call flows supported in H323?
  39. What is fast start and slow start? Explain the difference between them.
  40. What is early media? Explain the call flow.
  41. What are TCS and OLC in H323?
  42. What is the difference between early offer and delayed offer?
  43. Which protocol does Q931 backhauling and what does it mean?
  44. What is SDP? Which signaling protocols use it?
  45. What is silence suppression?
  46. What is use of region in CUCM?
  47. What do you mean by default dial-peer?
  48. What is AAR?
  49. What is SRST and MGCP fall-back?
  50. In which situation do we not require MGCP fall-back configuration with SRST configuration?


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