The answer is a reject directive in the client’s /etc/dhcp/dhclient.conf file. This is correct because the DHCP client, when configured with a `reject` statement, will silently discard a DHCPOFFER from a specified server without sending a DHCPREQUEST, which explains why the exchange halts after the offer from 192.168.1.1. On the LPIC-2 exam, this scenario tests your understanding of client-side filtering in the DHCP lease process, often appearing as a trick where the server appears functional but the client ignores it. A common trap is to blame server misconfiguration or network issues, but the key clue is the missing DHCPREQUEST after a valid offer. Remember the mnemonic: “Reject before request” — if you see an offer but no request, check dhclient.conf for a reject line targeting that server’s IP.
LPIC-2 Network Client Management Practice Question
This LPIC-2 practice question tests your understanding of network client management. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 port 67 or port 68`:
```
13:10:05.123456 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:1a:2b:3c:4d:5e, length 300
13:10:05.123789 IP 192.168.1.1.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 300
```
Refer to the exhibit. The output shows a DHCP exchange between a client (MAC 00:1a:2b:3c:4d:5e) and a server (192.168.1.1). The client is not obtaining an IP address. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Refer to the exhibit.
Output of `tcpdump -i eth0 port 67 or port 68`:
```
13:10:05.123456 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:1a:2b:3c:4d:5e, length 300
13:10:05.123789 IP 192.168.1.1.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 300
```
A
The client's /etc/dhcp/dhclient.conf contains a 'reject' statement that rejects offers from this server.
If the client rejects the server, it will ignore the offer and continue sending requests.
B
The DHCP server did not receive the client's request.
Why wrong: The server sent a reply, so it received the request.
C
The DHCP server is not reachable from the client.
Why wrong: The server replied, so it is reachable.
D
The client's MAC address is not authorized on the DHCP server.
Why wrong: If unauthorized, the server would not reply with an offer; but it did reply.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The client's /etc/dhcp/dhclient.conf contains a 'reject' statement that rejects offers from this server.
Option A is correct because the DHCP client can be configured with a 'reject' statement in /etc/dhcp/dhclient.conf to ignore offers from specific servers. In this scenario, the client sends a DHCPDISCOVER, receives a DHCPOFFER from 192.168.1.1, but then does not proceed to DHCPREQUEST, indicating the offer was rejected locally. This matches the behavior of a reject rule, which causes the client to discard the offer without further communication.
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 client's /etc/dhcp/dhclient.conf contains a 'reject' statement that rejects offers from this server.
Why this is correct
If the client rejects the server, it will ignore the offer and continue sending requests.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The DHCP server did not receive the client's request.
Why it's wrong here
The server sent a reply, so it received the request.
✗
The DHCP server is not reachable from the client.
Why it's wrong here
The server replied, so it is reachable.
✗
The client's MAC address is not authorized on the DHCP server.
Why it's wrong here
If unauthorized, the server would not reply with an offer; but it did reply.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume DHCP failures are always server-side (e.g., authorization or reachability), overlooking client-side configuration files like dhclient.conf that can silently discard valid offers.
Detailed technical explanation
How to think about this question
The DHCP client daemon (dhclient) uses /etc/dhcp/dhclient.conf to define client-side policies, including the 'reject' statement that specifies server IP addresses to ignore. When a reject rule matches, the client discards the DHCPOFFER and continues listening for other offers, which can cause a loop if no acceptable server exists. This is distinct from server-side MAC filtering (option D), which would prevent the offer from being sent entirely.
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.
Network Client Management — This question tests Network Client Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The client's /etc/dhcp/dhclient.conf contains a 'reject' statement that rejects offers from this server. — Option A is correct because the DHCP client can be configured with a 'reject' statement in /etc/dhcp/dhclient.conf to ignore offers from specific servers. In this scenario, the client sends a DHCPDISCOVER, receives a DHCPOFFER from 192.168.1.1, but then does not proceed to DHCPREQUEST, indicating the offer was rejected locally. This matches the behavior of a reject rule, which causes the client to discard the offer without further communication.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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