LPIC-2 Advanced Networking Configuration Practice Question
This LPIC-2 practice question tests your understanding of advanced networking configuration. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company has multiple internet connections and wants to route traffic from specific subnets to specific providers. They are using policy-based routing with ip rule and ip route. After adding the rules, the administrator finds that the traffic is not matching the intended routing table. Which command should be used to verify that the rules are being matched correctly?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ip route get <destination> mark <mark>
Option B is correct because 'ip route get' with the 'mark' option simulates a packet lookup using the specified routing mark, allowing the administrator to see which routing table would be matched by the policy rules. This directly verifies whether the ip rule conditions (e.g., fwmark, source subnet) are correctly directing traffic to the intended table.
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.
✗
ip route show cache
Why it's wrong here
The route cache is deprecated and does not show rule matching.
✓
ip route get <destination> mark <mark>
Why this is correct
This command simulates the routing lookup and shows the rule and table used.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
ip rule show
Why it's wrong here
This shows the rules but does not show which rule is matched for a specific packet.
✗
ip route show table all
Why it's wrong here
This shows all routes in all tables, but does not indicate which rule is used for a given packet.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume 'ip rule show' is sufficient to verify rule matching, but it only displays the rules, not which rule is actually hit for a specific packet, leading to false confidence.
Trap categories for this question
Command / output trap
The route cache is deprecated and does not show rule matching.
Detailed technical explanation
How to think about this question
Policy-based routing uses ip rules to select a routing table based on packet attributes like source address, fwmark, or iptables marks. The 'ip route get' command performs a route lookup in the kernel's FIB, respecting all policy rules and marks, making it the definitive tool for debugging rule matching. In real-world scenarios, administrators often combine iptables with ip rule to set marks on packets, and 'ip route get' with the mark parameter is essential to verify the end-to-end path.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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: ip route get <destination> mark <mark> — Option B is correct because 'ip route get' with the 'mark' option simulates a packet lookup using the specified routing mark, allowing the administrator to see which routing table would be matched by the policy rules. This directly verifies whether the ip rule conditions (e.g., fwmark, source subnet) are correctly directing traffic to the intended table.
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.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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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