VoIP Fundamentals Flashcards
6 cards from real Business Phone Systems practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 VoIP Fundamentals flashcards as text
What does VoIP stand for?
Answer: Voice over Internet Protocol
VoIP stands for Voice over Internet Protocol, the technology that transmits voice calls over the internet.
Which protocol is most commonly used for signaling in VoIP systems?
Answer: SIP
SIP (Session Initiation Protocol) is the most widely used signaling protocol for establishing and terminating VoIP calls.
What is a codec in the context of VoIP?
Answer: A device that compresses and decompresses audio data
A codec compresses and decompresses audio data to reduce bandwidth usage while maintaining call quality.
What quality issue occurs when VoIP packets arrive out of order?
Answer: Jitter
Jitter refers to the variation in packet arrival times, which can cause choppy or distorted audio in VoIP calls.
Which port does SIP typically use for unencrypted signaling?
Answer: 5060
SIP uses port 5060 for unencrypted communications and port 5061 for TLS-encrypted signaling.
What is the recommended maximum one-way latency for acceptable VoIP call quality?
Answer: 150 ms
ITU-T G.114 recommends a maximum one-way latency of 150 ms for acceptable VoIP call quality.