mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip dhcp binding
Bindings from all pools not associated with VRF:
IP address Client-ID/ Lease expiration Type
Hardware address/ User name
192.168.1.10 0063.6973.636f.2e30. Mar 01 2020 12:00 AM Automatic
3030.3030.2e30.3030
312e.3130.3030.2e30
3030.312d.4574.682d302f.31
192.168.1.11 0063.6973.636f.2e30. Mar 01 2020 12:00 AM Automatic
3030.3030.2e30.3030
312e.3130.3030.2e30
3030.312d.4574.682d302f.31
Based on this output, which statement is correct?
⚠ Common exam trap
Cisco often tests the distinction between a duplicate client-ID and a normal DHCP binding, where candidates mistakenly assume two different IP addresses mean two unique clients, ignoring the identical client-ID field in the output.
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 DHCP server has a duplicate client-id issue, likely caused by two clients using the same client identifier.
The output shows two DHCP bindings with identical client identifiers (the long hexadecimal string). This indicates that two clients are using the same client-ID, which violates RFC 2131 and causes the DHCP server to treat them as the same client, leading to duplicate address assignments or conflicts. Option B correctly identifies this duplicate client-id issue.
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 DHCP server is functioning correctly with two unique bindings.
Why it's wrong here
The client-IDs are identical, so they are not unique.
- ✓
The DHCP server has a duplicate client-id issue, likely caused by two clients using the same client identifier.
Why this is correct
The hex client-id is identical for both bindings, indicating a duplicate.
- ✗
The DHCP server has run out of addresses in the pool.
Why it's wrong here
There is no indication of pool exhaustion; only two bindings are shown.
- ✗
The DHCP server is not assigning addresses because the lease time is set to 0.
Why it's wrong here
Lease expiration is shown, but it does not indicate a lease time of 0.
Visual reference
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
DHCP Client and Server
A DHCP client is any device that requests network configuration settings from a DHCP server, which automatically assigns IP addresses and other parameters to devices on a network.
Key term
MPLS Layer 3 VPN
A technology that uses Multiprotocol Label Switching to create secure, scalable virtual private networks that connect multiple sites at the network layer, where the service provider manages routing between customer sites.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco 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 300-410 exam.