- A
Server push
Why wrong: Server push sends resources proactively, not header compression.
- B
Binary framing layer
Why wrong: Binary framing is the format, but HPACK does the compression.
- C
HPACK
HPACK is specifically designed for HTTP/2 header compression.
- D
Multiplexed streams
Why wrong: Multiplexing allows multiple streams over a single connection, but does not compress headers.
Question 765 of 1,000
200-901 Network Fundamentals Practice Question
This 200-901 practice question tests your understanding of network fundamentals. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer configures an HTTP/2 server. Which feature of HTTP/2 reduces overhead by compressing headers using HPACK?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HPACK
HPACK is the header compression mechanism specified for HTTP/2 (RFC 7541). It reduces overhead by encoding HTTP headers into a compact binary format using static and dynamic tables, eliminating redundant header data across requests. This directly addresses the question's focus on reducing overhead through header compression.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Server push
Why it's wrong here
Server push sends resources proactively, not header compression.
- ✗
Binary framing layer
Why it's wrong here
Binary framing is the format, but HPACK does the compression.
- ✓
HPACK
Why this is correct
HPACK is specifically designed for HTTP/2 header compression.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Multiplexed streams
Why it's wrong here
Multiplexing allows multiple streams over a single connection, but does not compress headers.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between features that improve performance (multiplexing, server push) versus the specific mechanism for header compression (HPACK), leading candidates to confuse multiplexing or binary framing with compression.
Detailed technical explanation
How to think about this question
HPACK uses a combination of a static table (predefined common headers like :method, :path) and a dynamic table (headers seen during the session) to replace repeated header strings with small integer indices. This can reduce header overhead by 85-90% in typical web traffic, which is critical for performance on high-latency or constrained networks. In real-world scenarios, HPACK's dynamic table size is negotiated via the SETTINGS_HEADER_TABLE_SIZE frame, and improper configuration can lead to memory exhaustion attacks.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 200-901 question test?
Network Fundamentals — This question tests Network Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: HPACK — HPACK is the header compression mechanism specified for HTTP/2 (RFC 7541). It reduces overhead by encoding HTTP headers into a compact binary format using static and dynamic tables, eliminating redundant header data across requests. This directly addresses the question's focus on reducing overhead through header compression.
What should I do if I get this 200-901 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.
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