Build fluency in the vocabulary of forward error correction (FEC).
0 / 5 completed
1 / 5
A teammate explains that a real-time video stream sends extra, redundantly-coded packets alongside the original data, so that if a receiver's network drops one of the original packets, the receiver can mathematically reconstruct the missing data from the redundant packets already in hand, without ever asking the sender to retransmit it. What is being described?
Forward error correction (FEC) is exactly what is described here. A DNS zone transfer is an unrelated concept about replicating name server records. Understanding forward error correction (FEC) is exactly why it comes up so often in real engineering discussions of this kind of problem.
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During a design review, the team adopts forward error correction (FEC), specifically to gain a concrete benefit. Which capability does this provide?
Forward error correction (FEC) here provides reconstruction of a lost packet without a retransmission round trip, since redundant coded data sent alongside the original lets the receiver rebuild missing data locally. Waiting for the sender to notice a dropped packet and retransmit it, adding at least a full round-trip of extra latency before the missing data arrives is the alternative this avoids. This behavior is exactly why forward error correction (FEC) is favored in this kind of scenario.
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In a code review, a dev notices a system relies on waiting for the sender to notice a dropped packet and retransmit it, adding at least a full round-trip of extra latency before the missing data arrives, instead of using forward error correction (FEC). What does this represent?
This is a missed forward error correction (FEC)-opportunity, since forward error correction (FEC) would provide reconstruction of a lost packet without a retransmission round trip, since redundant coded data sent alongside the original lets the receiver rebuild missing data locally. 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.
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An incident report shows a live video call stuttered noticeably on every packet loss because the receiver had to wait a full network round-trip for the sender to retransmit each dropped packet. What practice would prevent this?
Sending redundant forward-error-correction data alongside the original stream so a dropped packet can be reconstructed locally instead of waiting a full round-trip for retransmission. 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.
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During a PR review, a teammate asks why the team reaches for forward error correction (FEC) instead of waiting for the sender to notice a dropped packet and retransmit it, adding at least a full round-trip of extra latency before the missing data arrives. What is the reasoning?
Forward error correction trades some extra bandwidth spent on redundant coded data for recovering a lost packet without waiting a full round-trip for retransmission, while retransmission-based recovery uses less bandwidth up front but adds a full round-trip of latency for every lost packet, which a latency-sensitive stream cannot tolerate. This is exactly why forward error correction (FEC) is favored in scenarios that call for it, while the alternative remains acceptable in simpler cases that don't.
What does the "Forward error correction (FEC) Vocabulary" vocabulary exercise cover?
This exercise tests real IT vocabulary related to forward error correction (fec) 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.
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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.
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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?
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