A teammate explains that a voice-call app holds incoming audio packets in a small buffer for a brief, adaptively-sized delay before playing them back, reordering any packets that arrived out of sequence and smoothing out the variable, jittery arrival times a real network produces, instead of playing each packet back the instant it arrives. What is being described?
A jitter buffer is exactly what is described here. A DNS zone transfer is an unrelated concept about replicating name server records. Understanding jitter buffer is exactly why it comes up so often in real engineering discussions of this kind of problem.
2 / 5
During a design review, the team adopts jitter buffer, specifically to gain a concrete benefit. Which capability does this provide?
Jitter buffer here provides smooth, glitch-free audio playback despite variable network delay, since packets are briefly buffered and reordered before playback instead of being played the instant they arrive. Playing back each audio packet the instant it arrives, with no buffering to smooth out variation in network delivery timing at all is the alternative this avoids. This behavior is exactly why jitter buffer is favored in this kind of scenario.
3 / 5
In a code review, a dev notices a system relies on playing back each audio packet the instant it arrives, with no buffering to smooth out variation in network delivery timing at all, instead of using jitter buffer. What does this represent?
This is a missed jitter buffer-opportunity, since jitter buffer would provide smooth, glitch-free audio playback despite variable network delay, since packets are briefly buffered and reordered before playback instead of being played the instant they arrive. A cache eviction policy is an unrelated concept about discarded cache entries. This pattern is exactly the kind of gap a reviewer flags once the tradeoffs are understood.
4 / 5
An incident report shows users reported choppy, glitchy audio on a voice-call feature because packets were played back the instant they arrived, with no buffer to smooth out the network's naturally variable packet timing. What practice would prevent this?
Adding a jitter buffer that holds and reorders incoming packets for a brief adaptive delay before playback, smoothing out the network's variable arrival timing. Continuing the prior approach regardless of the risk it has already caused is exactly what led to the incident described here. This fix is the standard remedy once the root cause is confirmed.
5 / 5
During a PR review, a teammate asks why the team reaches for jitter buffer instead of playing back each audio packet the instant it arrives, with no buffering to smooth out variation in network delivery timing at all. What is the reasoning?
A jitter buffer trades a small, deliberate playback delay for smooth, glitch-free audio despite variable network timing, while playing packets back the instant they arrive minimizes latency but produces audible glitches whenever network delivery timing varies, which it always does to some degree. This is exactly why jitter buffer is favored in scenarios that call for it, while the alternative remains acceptable in simpler cases that don't.
What does the "Jitter buffer Vocabulary" vocabulary exercise cover?
This exercise tests real IT vocabulary related to jitter buffer vocabulary through 5 multiple-choice questions, each built from realistic workplace sentences rather than abstract definitions.
Is this vocabulary exercise free to use?
Yes. Every exercise on CoderSlingo, including this one, is completely free — no account, sign-up, or payment required.
How many questions does this exercise have?
This exercise has 5 questions. Each one shows a real-world sentence or scenario with multiple-choice options and an explanation once you answer.
What happens after I answer a question?
You'll see immediate feedback showing whether your answer was correct, along with a short explanation of why — then a button to move to the next question, and a full results screen at the end.
Can I retry the exercise if I get questions wrong?
Yes. Once you reach the results screen, click "Try again" to reset your answers and go through the exercise from the start as many times as you like.
Do I need to create an account to take this exercise?
No account is needed. Your answers are scored in your browser during the session — nothing is saved to a server, so you can jump straight in.
Is my progress saved if I leave the page?
No — progress within an exercise resets if you navigate away or reload. Each exercise is short enough to complete in a few minutes in one sitting.
Are these vocabulary exercises connected to other topics?
Yes — browse the full vocabulary exercises hub to find related modules covering adjacent IT topics and roles.
How is this different from reading a glossary or blog article?
Exercises like this one are active recall drills — you have to choose the correct term or phrasing yourself, which builds retention faster than passively reading a definition.
Where can I find more vocabulary exercises?
Browse the full Vocabulary exercises hub for hundreds of modules covering Agile, DevOps, security, databases, architecture, and more — organised by IT role and skill.