8/13/2019 Questions of SIP

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Questions Of SIP Time:1.30hrs

Name:

Total Mark:100

Secured Mark:

1. What is SIP?

2. In which layer SIP works?

. Why SIP is called an !""lication layer Protocol?

#. What is a SIP Pro$y?

SIP proxies are elements that route SIP requests to user agent servers and SIP

responses to user agent clients. A request may traverse several proxies on its way to aUAS.

%. &oes SIP re'uire a use o( Pro$y ser)er?

*. What is a dialo+?

A dialog represents a peer-to-peer SIP relationship between two user agents that

persists for some time. It is from I!I"# to $%% &' ()#

,. -ow many headers re'uired com"letin+ a dialo+?Six

. -ow many ser)ers re'uired com"letin+ a success(ul transaction?

/. What is a session?

A $xx response to an I!I"# establishes a session

10. -ow a session estalished in SIP?

To estalish a session (irst ! has to send a IN3IT4 re'uest towards the !S.

11. What are the di((erent Messa+e "resent In si"?

12. Is SIP is a layered "rotocol? I( how many layers it su""orted?

1. What is the 5o o( a "ro$y ser)er?

1#. -ow many ser)ers SIP su""orted?

6edirect7 "ro$y7 !7 re+istrar

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1%. What is state(ul Pro$y 8 state less "ro$y?

1*. What is the asic 9o o( a 6edirect ser)er?

*aps the destination address to +ero or more new addresses, and returns the translated address

to the originator of the request.

1,. What is the asic 9o o( a ocation ser)er?

1. What is re+istration in SIP?

1/. What r di((erent com"onents in SIP?

20. -ow many ty"es o( methods in SIP accordin+ to r(c2*1?

IN3IT47 64;IST!67 PTI>N7 !N47 !

21. What r the mandatory "arameters in SIP?

T>7 @6>M7 !AI&7 S4B7 3I!7 M!C@>6W!6&S

22. What is the relationshi" etween 3I! 8 (rom headers in SIP?

2. What is the messa+e synta$ o( a T> header?

2#. What is the messa+e synta$ o( @rom header?

2%. What is the di((erence etween allAId 8 ranch?

2*. What is the use o( Ma$ (orward header?

2,. What is the di((erence etween

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#. Write down the 64;IST6!TI>N call (low where

&omainFacti.comserF!nyone

%. i( the in the (irst re+ister re'uest the user +et the #01 res"onse then which header (ield is comes

with this.*. call (low:

1GGThird "arty re+istration .2GGNormal 6e+istration.GG6ere+ister .

#GG&ere+ister.

,.what is the role o( ' "arameter in contact.

.what is the role o( the e$"ire "arameter "resent in the contact. -eader.

/. I( I re+ister mysel( in 10 di((erent location and I +ot 10 contact then how can I dere+ister those10 contacts at one +oal.

#0.which header carry the trans"ort used in si".

#1.i( the ma$A(orward )alue decrement to Hero ut the re'uest dose not reached the (inaldestination then what res"onse will come.

#2. &ose ranch and to ta+ will chan+e in the ! re'uest.

#.What are the mandatory "arameter "resent in S&P.

##.What dose 6@ mean.#%.why 3ia is used.

#*.&ose To header (ield )alue chan+e when it tra)erse (orm one "ro$y to another.

#,. What is the synta$ o( call id.

#. What dose SIP "ro)ide.

#/.&ose I use the SIP "rotocol in Trans"ort layer.

%0.When TP is used as trans"ort in SIP.