SSCA SIP Headers 5

Question 1

Which SIP header is used to convey the reason for a call termination or rejection?

Accepted Answer

Reason

Answer

The Reason header provides additional information about why a call was terminated or rejected, using protocol and cause code values.

Question 2

What does the Accept-Language header indicate in a SIP request?

Accepted Answer

The preferred languages for reason phrases and session descriptions in the response

Answer

Accept-Language indicates the preferred natural languages for human-readable content in responses, similar to its HTTP counterpart.

Question 3

In SIP event notification, which header specifies the event package being subscribed to?

Accepted Answer

Event

Answer

The Event header in SUBSCRIBE and NOTIFY requests specifies which event package the subscription or notification applies to.

Question 4

What does a Subscription-State header value of 'terminated' indicate in a NOTIFY?

Accepted Answer

The subscription has ended and no further NOTIFYs will be sent

Answer

A Subscription-State of 'terminated' tells the subscriber that the subscription is over and no additional NOTIFY requests will follow.

Question 5

Which SIP header is used to group multiple related calls together, such as in a conference?

Accepted Answer

Join

Answer

The Join header is used in an INVITE to mix the new call into an existing dialog, commonly used for three-way calling or conference bridging.

(SSCA) Sip School Certified Associate Practice Test