Reg. Task $6$

$1-$ What type of SIP Proxy Server is involved in the case of Proxy$(2)$ stateful or stateless?

$2-$ What type of SIP Proxy Server is involved in the case of Proxy$(4)$stateful or stateless?

$3-$Specify the via header fields for the message $(8)$ in the correct order from bottom to top.

Via:

$4-$ Specify the Record$-$Route header fields for the message $(8)$ in the correct order from bottom to top.

Record$-$Route:

$5-$Specify the route header fields for the message $(24)$ in the correct order from bottom to top.

Route:

$6-$How many route header fields does the SIP message $(26)$ contain?

$7-$ How many SIP dialogs are shown in Figure $6\mathrm{.}1?$

$8-$ How many SIP transactions are shown in Figure $6\mathrm{.}1?$

$9-$Which SIP messages $($marked by the numbers in brackets$)$ belong to which SIP transactions?