SIP Interview Questions

1. What is VOIP? What is the
Common problem you will face
while using Voip Service?

2. What is SIP? What is the major
discovery in SIP if compare with
Other Protocols?

3. What is SIP Protocol
Structure?

4. What are L2 and L3 Layers?

5. What are the general headers
you will see in SIP Requests and
Responses?

6. How to do SIP conformance
Testing?

7. What kind of scripts you know
to automate SIP Call flow?

8. How to check usability testing
on SIP Phone?

9. How you will do Compatibility
testing on Voip?

10. Give me an example when
servers send 5XX response?

11.What is Dialog?

12.What is Transaction? How many transaction you can find for INVITE to 200 OK What is Refer?

13.What is the difference between call leg and call id?

14.What is the major difference between stateless and statefull?

15.How to identify call loop?

16.What are the parameters you will check to know call got looped?

17.What is the difference between Route and Record-Route?

18.What is via, Branch, Tag? What is Early dialog?