LPIC-2 Advanced Networking Configuration Practice Question
Exhibit
Refer to the exhibit.
# ip addr show eth0
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:1a:2b:3c:4d:5e brd ff:ff:ff:ff:ff:ff
inet 192.168.1.100/24 brd 192.168.1.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::21a:2bff:fe3c:4d5e/64 scope link
valid_lft forever preferred_lft foreverThe server is unable to communicate with hosts on the 192.168.2.0/24 network. Based on the exhibit, what is the most likely cause?
⚠ Common exam trap
Test-takers frequently assume a missing default gateway only affects internet access, but it also prevents communication with any non-local subnet, including private networks like 192.168.2.0/24, leading them to incorrectly suspect subnet mask or IP conflicts.
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 interface has no default gateway configured.
The exhibit shows the interface has an IP address of 192.168.1.10/24 and a default gateway of 0.0.0.0, meaning no default gateway is configured. Without a default gateway, the host cannot route packets to the 192.168.2.0/24 network because that network is not directly connected (it is on a different subnet), and the host has no route to forward traffic beyond its local link. The `route -n` output would confirm the absence of a gateway entry, which is the most likely cause of the communication failure.
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 interface has a duplicate IP address.
Why it's wrong here
No evidence of duplicate IP; the interface is up and configured.
- ✗
The hardware address is corrupted.
Why it's wrong here
The MAC address appears valid and the link is UP.
- ✓
The interface has no default gateway configured.
Why this is correct
Without a default gateway, traffic to other subnets cannot be routed.
- ✗
The subnet mask is incorrect.
Why it's wrong here
The subnet mask /24 is correctly set for 192.168.1.0/24.
Visual reference
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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