LPIC-2 Advanced Networking Configuration Practice Question
Exhibit
Refer to the exhibit. Output of 'ip route show' on a Linux router: default via 10.0.0.1 dev eth0 metric 100 10.0.0.0/24 dev eth0 proto kernel scope link src 10.0.0.2 metric 100 192.168.1.0/24 via 10.0.0.254 dev eth0 metric 50 192.168.2.0/24 dev eth1 proto kernel scope link src 192.168.2.1 metric 100
A packet destined to 192.168.1.100 is sent from this router. Which interface will be used to forward it?
⚠ Common exam trap
Watch out — candidates often assume the router will use the interface with the same IP subnet as the destination, but they forget to verify that the routing table actually contains a directly connected route for that subnet; without a matching route, the packet would be dropped or forwarded via a default route.
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
✓
The packet will be dropped
Without a routing table or interface IP configuration provided, we cannot assume any interface is on the 192.168.1.0/24 network. By default, if a router has no route to a destination, it will drop the packet. Therefore, the packet will be dropped.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
eth0
Why it's wrong here
eth0 might be correct if it has an IP in the destination subnet, but this information is not given in the stem.
- ✗
lo
Why it's wrong here
lo is the loopback interface, not used for forwarding packets to other hosts.
- ✗
eth1
Why it's wrong here
eth1 is just another interface with an unknown IP address and no evidence of a route.
- ✓
The packet will be dropped
Why this is correct
Without a route, the router will drop the packet. This is the only answer consistent with the information (or lack thereof) provided.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LPIC-2 practice question is part of Courseiva's free LPI 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 LPIC-2 exam.