FREE ACA SIP Protocol & Routing Questions and Answers

Question 1

What does SIP stand for in VoIP communication?

Accepted Answer

Session Initiation Protocol

Answer

SIP is an acronym that stands for Session Initiation Protocol. It is a widely used signaling protocol in VoIP communication for initiating, managing, and terminating real-time multimedia sessions, including voice and video calls, instant messaging, and other data communications over IP networks.

Question 2

What is the primary function of SIP in VoIP systems?

Accepted Answer

To establish, modify, and terminate communication sessions

Answer

The primary function of SIP (Session Initiation Protocol) in VoIP systems is to manage the lifecycle of communication sessions. This includes initiating a call (e.g., ringing a phone), modifying session parameters (e.g., adding video), and gracefully terminating the session (e.g., hanging up). SIP acts as the control plane for setting up and tearing down calls.

Question 3

Which of the following is a valid SIP message method?

Accepted Answer

REGISTER

Answer

REGISTER is a valid SIP message method used by a User Agent Client (UAC) to register its current location and contact information with a SIP registrar server. This allows the registrar to map the user's SIP address to their current IP address, enabling incoming calls to be routed correctly. Other common methods include INVITE, ACK, BYE, and CANCEL.

Question 4

What is the purpose of SIP routing?

Accepted Answer

To route SIP messages to the correct destination

Answer

SIP routing is the process of directing SIP messages, such as INVITEs for call setup, through the network to their intended recipients. SIP proxy servers and other routing elements analyze the destination address in the SIP message and forward it along the appropriate path. This ensures that calls and other session requests reach the correct user or device.

Question 5

What is a SIP proxy server?

Accepted Answer

It forwards SIP messages to their intended destinations

Answer

A SIP proxy server acts as an intermediary in SIP communication, receiving SIP requests from clients and forwarding them towards the ultimate destination. It can perform various functions like routing, authentication, and network address translation (NAT) traversal. Essentially, it helps direct calls and other SIP messages across the network to ensure they reach the correct endpoint.

ACA - Audiocodes Certified Associate Practice Test

ACA - Audiocodes Certified Associate Practice Test

FREE ACA SIP Protocol & Routing Questions and Answers