Practise vocabulary for diagnosing slow networks: round-trip time, jitter, packet loss, traceroute hops, and bandwidth vs latency.
0 / 10 completed
1 / 10
The time for a packet to travel to a host and back is the ___.
RTT, often measured by ping, captures the latency of a there-and-back journey and is a core network performance signal.
2 / 10
Variation in packet delay over time, harmful to real-time audio/video, is ___.
Jitter is the inconsistency in latency between packets; high jitter causes choppy calls even when average latency is acceptable.
3 / 10
When packets never arrive and must be retransmitted, you are seeing packet ___.
Packet loss forces retransmission and stalls protocols like TCP, badly degrading effective performance.
4 / 10
Running traceroute lists each ___ along the path so you can spot where delay is introduced.
Each hop is a router on the path; per-hop timings reveal which segment adds the latency.
5 / 10
A link can have high bandwidth yet still feel slow if it has high ___.
Bandwidth (capacity) and latency (delay) are independent; a fat but high-latency pipe still feels sluggish for interactive use.
6 / 10
Alice from the Performance Team posted this comment on a recent code review of our new API endpoint:
'The response time is consistently high – around 300ms. I've run some basic latency tests, but haven't been able to pinpoint the source. I suspect it might be related to the database server, but need more granular data.'
Which of the following terms best describes what Alice is *actually* trying to investigate?
Alice is focusing on RTT, which is the fundamental measurement she's taking. While jitter and bandwidth are related concepts, they don't directly describe the issue of consistently high response times reported in her comment. Packet loss would likely result in more frequent errors and retry attempts, not just a persistent delay.
7 / 10
You're debugging latency issues with a new microservice deployment. The API response times are consistently high, but the network infrastructure itself appears healthy (no obvious bottlenecks). Analyzing the logs reveals frequent delays on individual packets. Which metric is MOST likely causing this intermittent delay?
Propagation Delay is *always* present due to the speed of light and the distance data travels. This delay contributes significantly to latency, especially over long distances. While jitter can also affect performance, propagation delay represents the fundamental physical limitation that's causing the intermittent delays observed in your logs.
8 / 10
During a standup meeting, you're discussing a recent spike in latency experienced by users accessing our SaaS platform. You observe that the average RTT to the primary CDN is consistently high. Which tool would be most helpful for quickly identifying potential causes of this increased delay?
Ping is ideal for rapidly assessing RTT to a target server. It provides immediate feedback on network latency and can quickly reveal if the problem lies with the connection itself. While traceroute helps identify the path and potential bottlenecks, ping offers the fastest initial assessment of delay.
9 / 10
You're investigating a slow API response time for a mobile application. You run `traceroute` to the server and observe significant latency increases at multiple hops along the network path. What is the *primary* purpose of this command in diagnosing latency issues?
`traceroute` is specifically designed to trace the path a packet takes. By examining the latency at each 'hop' (router), you can pinpoint where delays are introduced along the network route – this could be due to congestion or problematic network devices. It doesn't directly measure bandwidth or encryption protocols.
10 / 10
A DevOps engineer is troubleshooting slow build times for a CI/CD pipeline. They've identified that the network latency between the code repository and the build server is consistently high. What key concept should they be considering to address this issue?
Propagation delay is *always* present due to the speed of light and the distance data travels. Understanding this fundamental limitation is crucial for optimizing network latency in CI/CD pipelines. While bandwidth throttling and packet loss contribute to problems, propagation delay represents the core physical cause of the observed delays.
What does the "Network Latency Debugging Vocabulary" exercise cover?
Practise vocabulary for diagnosing slow networks: round-trip time, jitter, packet loss, traceroute hops, and bandwidth vs latency.
Is this exercise free to use?
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How many questions are in "Network Latency Debugging Vocabulary"?
This exercise has 10 questions. Each one gives instant feedback with an explanation, so you can see exactly why an answer is right or wrong.
Do I need to create an account to save my progress?
No account is required. The progress bar and score are tracked in your browser for the current session -- the exercise is designed to be a quick, repeatable drill rather than something you resume later.
What happens if I get an answer wrong?
You'll see the correct answer highlighted immediately, along with a short explanation of why it's correct. Wrong answers aren't penalized beyond your score, and you can keep going through every question.
How is this exercise different from reading an article?
Articles explain vocabulary and concepts through prose, while exercises like this one are interactive drills -- multiple-choice questions -- that test and reinforce your recall of specific terms and phrasing.
Can I retry this exercise?
Yes -- use the "Try again" button on the results screen to reset your score and go through all the questions again from the start.
Where can I find more Networking Language exercises?
Browse the full Networking Language hub for related drills, or check the site-wide exercises index for other IT English topics.
Is this exercise suitable for beginners?
This exercise assumes basic familiarity with IT terminology. If a term feels unfamiliar, check the site Glossary for a plain-English definition before attempting the questions.
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New exercises are added regularly across all categories, alongside new vocabulary sets and articles. Check back on the exercises hub to see what's new.