LPIC-2 Advanced Networking Configuration Practice Question
This LPIC-2 practice question tests your understanding of advanced networking configuration. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Exhibit
Refer to the exhibit.
Output of 'tcpdump -i eth0 -n' on a server:
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
18:34:22.123456 IP 10.0.0.1 > 10.0.0.2: ICMP echo request, id 1, seq 1, length 64
18:34:22.123789 IP 10.0.0.2 > 10.0.0.1: ICMP echo reply, id 1, seq 1, length 64
18:34:23.124456 IP 10.0.0.1.54321 > 10.0.0.3.80: Flags [S], seq 123456, win 65535, options [mss 1460], length 0
18:34:23.125001 IP 10.0.0.3.80 > 10.0.0.1.54321: Flags [S.], seq 654321, ack 123457, win 65535, options [mss 1460], length 0
18:34:23.125200 IP 10.0.0.1.54321 > 10.0.0.3.80: Flags [.], ack 654322, win 65535, length 0
Based on the capture, which of the following statements is correct about the communication between 10.0.0.1 and 10.0.0.3?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
All of the above
Option B is correct because the TCP three-way handshake (SYN, SYN-ACK, ACK) is visible in the capture, the client 10.0.0.1 uses a high ephemeral port (e.g., 49152), and the server 10.0.0.3 responds on port 80, indicating an HTTP server is running. All three statements (A, C, D) are true, making 'All of the above' the correct choice.
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.
✗
The three-way handshake is complete for a TCP connection
Why it's wrong here
True, but not the only correct statement.
✓
All of the above
Why this is correct
All three statements are correct based on the capture.
Related concept
Read the scenario before looking for a memorised answer.
✗
The client is using a random high port
Why it's wrong here
True, but not the only correct statement.
✗
The server 10.0.0.3 is running an HTTP server
Why it's wrong here
True, but not the only correct statement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume only one statement is correct, but the question is designed so that all three individual statements (A, C, D) are true, making 'All of the above' the only comprehensive answer.
Detailed technical explanation
How to think about this question
The TCP three-way handshake (RFC 793) establishes a connection with SYN, SYN-ACK, and ACK segments. Ephemeral ports (typically 49152–65535 on Linux) are assigned by the kernel to client sockets. HTTP servers listen on port 80 by default; a SYN-ACK from port 80 confirms the service is active. In real-world diagnostics, tcpdump or Wireshark can verify these details, and a missing ACK would indicate an incomplete handshake.
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 LPIC-2 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.
Advanced Networking Configuration — This question tests Advanced Networking Configuration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: All of the above — Option B is correct because the TCP three-way handshake (SYN, SYN-ACK, ACK) is visible in the capture, the client 10.0.0.1 uses a high ephemeral port (e.g., 49152), and the server 10.0.0.3 responds on port 80, indicating an HTTP server is running. All three statements (A, C, D) are true, making 'All of the above' the correct choice.
What should I do if I get this LPIC-2 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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Question Discussion
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