Phone Service Business VoIP Technology & Protocols

Question 1

What does VoIP stand for?

Accepted Answer

Voice over Internet Protocol

Answer

VoIP stands for Voice over Internet Protocol, the technology for delivering voice communications over IP networks.

Question 2

Which protocol is most commonly used for initiating and terminating VoIP calls?

Accepted Answer

SIP

Answer

SIP (Session Initiation Protocol) is the most widely used signaling protocol for setting up, managing, and terminating VoIP sessions.

Question 3

What protocol is used to actually transport the audio data during a VoIP call?

Accepted Answer

RTP

Answer

RTP (Real-time Transport Protocol) carries the actual voice media packets during an active VoIP call.

Question 4

What is jitter in the context of VoIP quality?

Accepted Answer

Variation in packet arrival times that causes choppy audio

Answer

Jitter is the inconsistency in packet arrival times, which causes audio distortion or choppiness in VoIP calls.

Question 5

Which VoIP codec is known for providing high-definition voice quality and is commonly supported by modern business phones?

Accepted Answer

G.722

Answer

G.722 is a wideband codec that delivers HD voice quality by using a higher sampling rate than standard narrowband codecs.

Phone Service Business Practice Test