This LFCS practice question tests your understanding of networking. 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.
[root@server ~]# ip route show
10.0.0.0/24 dev eth0 proto kernel scope link src 10.0.0.100 metric 100
10.0.1.0/24 dev eth1 proto kernel scope link src 10.0.1.100 metric 101
default via 10.0.0.1 dev eth0 proto static metric 100
Given the routing table, if the server sends a packet to destination 10.0.1.200, which interface will be used and what is the next hop?
Refer to the exhibit.
[root@server ~]# ip route show
10.0.0.0/24 dev eth0 proto kernel scope link src 10.0.0.100 metric 100
10.0.1.0/24 dev eth1 proto kernel scope link src 10.0.1.100 metric 101
default via 10.0.0.1 dev eth0 proto static metric 100
A
eth1 via 10.0.1.1
Why wrong: No gateway is specified in the routing entry for that network.
B
eth1 directly to 10.0.1.200
Directly connected route, no gateway needed.
C
eth0 with next hop 10.0.0.1
Why wrong: The default route is not used because there is a more specific route.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
eth1 directly to 10.0.1.200
The destination 10.0.1.200 falls within the directly connected network 10.0.1.0/24 on eth1. According to the routing table, this route has a /24 netmask and is marked as directly connected, meaning no next-hop router is needed. The server will ARP for 10.0.1.200 and send the packet directly to that host via eth1.
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.
✗
eth1 via 10.0.1.1
Why it's wrong here
No gateway is specified in the routing entry for that network.
Read the scenario before looking for a memorised answer.
✗
eth0 with next hop 10.0.0.1
Why it's wrong here
The default route is not used because there is a more specific route.
✗
eth0 with next hop 10.0.1.200
Why it's wrong here
eth0 is not on the same subnet.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume all traffic must go through a gateway (next hop), forgetting that directly connected routes allow direct delivery without a router, leading them to pick Option A or C.
Detailed technical explanation
How to think about this question
When a packet matches a directly connected route in the routing table, the kernel performs a neighbor lookup (ARP) to resolve the destination IP to a MAC address on that interface. The route's 'proto kernel' flag indicates it was added automatically when the interface was configured with an IP address and netmask. In real-world scenarios, misconfigured static routes or overlapping subnets can cause traffic to be sent to a gateway unnecessarily, leading to asymmetric routing or black holes.
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.
Networking — This question tests Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: eth1 directly to 10.0.1.200 — The destination 10.0.1.200 falls within the directly connected network 10.0.1.0/24 on eth1. According to the routing table, this route has a /24 netmask and is marked as directly connected, meaning no next-hop router is needed. The server will ARP for 10.0.1.200 and send the packet directly to that host via eth1.
What should I do if I get this LFCS 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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This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.
Question Discussion
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