1K0-001 · Question #319
What is the audio data rate in bits per second that a G.723.1 and G.729 audio algorithms that use over a network connection?
The correct answer is D. less than 10,000. See the full explanation below for the reasoning.
Question
What is the audio data rate in bits per second that a G.723.1 and G.729 audio algorithms that use over a network connection?
Options
- Agreater than 64,000
- Bgreater than 16,000
- Cless than 5,000
- Dless than 10,000
How the community answered
(31 responses)- A3% (1)
- B3% (1)
- C10% (3)
- D84% (26)
Community Discussion
9
Ingrid P.Jun 18, 2026D is correct. G.729 runs at 8 kbps and G.723.1 runs at either 5.3 or 6.3 kbps, both well under the 10,000 bps threshold in option D. These codecs exist specifically because 64 kbps G.711 was too expensive over WAN links, so the whole point of G.729 and G.723.1 is aggressive compression to slash bandwidth consumption. Options A and B describe rates that would defeat the purpose of using these codecs entirely, and option C is a trap if you mix up G.723.1 rates with a made-up threshold, since 5,300 bps is technically less than 5,000 is false. Make a card for this one with the exact rates on the back, G.729 at 8 kbps and G.723.1 at 5.3 or 6.3 kbps, because the exam loves to test whether you know the specific numbers versus just knowing these are "low bitrate."
Toby R.May 22, 2026This one tripped me up at first but once you remember that G.729 runs at 8 kbps and G.723.1 tops out around 6.3 kbps, the answer kind of locks itself in below a certain threshold. Anyone know if the exam ever gets specific about which codec runs at which exact rate, or does it just expect you to know they both fall under the same general ceiling?
Ingrid P.May 22, 2026G.723.1 actually has two rates, 5.3 kbps and 6.3 kbps, so knowing that lower floor matters too when an exam question tries to split hairs between the two codecs.
Yusuf A.Jun 1, 2026Saw this one and almost picked C, but my mentor drilled G.729 at 8 kbps and G.723.1 at 5.3 or 6.3 kbps into me, so D was easy.
Luis F.Jun 1, 2026Your mentor gave you solid anchors, though it is worth burning in that G.723.1 actually has two rates, 5.3 and 6.3 kbps, where 6.3 uses MP-MLQ and sounds noticeably better, so knowing which rate the question targets can save you from a trap answer.
Dervla O.Jun 21, 2026D, not C, because both codecs sit just under 8,000 bps, not under 5,000.
Yusuf A.Jun 22, 2026Good catch Dervla, and worth adding that G.723.1 actually has two modes, 5.3 kbps and 6.3 kbps, so both rates still clear the 8,000 bps ceiling with room to spare, which is exactly why that distractor answer about 5,000 bps trips people up.
Luis F.Jun 9, 2026Yeah D is right, both G.729 and G.723.1 are low-bitrate codecs designed specifically to compress voice below 10,000 bps, with G.729 running at 8 kbps and G.723.1 running at either 5.3 or 6.3 kbps. That is exactly why these codecs became so popular for VoIP over low-bandwidth WAN links where you could not afford to burn 64 kbps per call like you would with G.711.
Toby R.Jun 12, 2026Good add, and worth throwing in that the exam also hit me on cRTP, because in practice you pair those low-bitrate codecs with compressed RTP headers to shave the per-packet overhead down even further on those slow WAN links.