Business Phone Systems VoIP Fundamentals

Question 1

What does VoIP stand for?

Accepted Answer

Voice over Internet Protocol

Answer

VoIP stands for Voice over Internet Protocol, the technology that transmits voice calls over the internet.

Question 2

Which protocol is most commonly used for signaling in VoIP systems?

Accepted Answer

SIP

Answer

SIP (Session Initiation Protocol) is the most widely used signaling protocol for establishing and terminating VoIP calls.

Question 3

What is a codec in the context of VoIP?

Accepted Answer

A device that compresses and decompresses audio data

Answer

A codec compresses and decompresses audio data to reduce bandwidth usage while maintaining call quality.

Question 4

What quality issue occurs when VoIP packets arrive out of order?

Accepted Answer

Jitter

Answer

Jitter refers to the variation in packet arrival times, which can cause choppy or distorted audio in VoIP calls.

Question 5

Which port does SIP typically use for unencrypted signaling?

Accepted Answer

5060

Answer

SIP uses port 5060 for unencrypted communications and port 5061 for TLS-encrypted signaling.

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