mediumMultiple Choice
350-401 Practice Question: Runs the following command on Router R4: R4# show…
A network engineer runs the following command on Router R4:
R4# show ip dhcp binding
Bindings from all pools not associated with VRF:
IP address Client-ID/ Lease expiration Type
Hardware address/ User name
10.0.0.10 0063.6973.636f.2d30. Mar 01 2025 12:00 PM Automatic
3030.302e.3030.3030.
2e30.3030.312d.4574.30
10.0.0.11 0063.6973.636f.2d30. Mar 01 2025 12:05 PM Automatic
3030.302e.3030.3030.
2e30.3030.312d.4574.31
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the distinction between 'Automatic' (dynamic) and 'Manual' (reservation) in the 'show ip dhcp binding' output, leading candidates to confuse active leases with static reservations.
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 two active leases.
The output shows two IP addresses (10.0.0.10 and 10.0.0.11) with lease expiration times and a type of 'Automatic', which indicates that these are dynamically assigned leases from the DHCP pool. The presence of two active leases confirms that the DHCP server has successfully allocated two addresses to clients, making option B correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Both clients have static DHCP reservations.
Why it's wrong here
The binding type shown is 'Automatic', which indicates a dynamically allocated address from a pool, not a 'Manual' or 'Reservation' type. Static DHCP reservations are configured with the client's MAC address bound to a fixed IP, and would appear with type 'Manual' in the DHCP binding table. Therefore, the presence of 'Automatic' bindings rules out this option.
- ✓
The DHCP server has two active leases.
Why this is correct
The DHCP binding table displays two entries, each with an IP address, client identifier, and a lease expiration time in the future. Active leases are defined as bindings that are currently assigned and not expired; both entries meet this criterion. This indicates the server has successfully leased addresses to two clients.
- ✗
The DHCP server is out of addresses.
Why it's wrong here
Exhaustion would typically be indicated by failed allocation attempts, no available addresses in the pool, or exhaustive use of the address space; none of these are shown. Only two bindings are listed, and no pool statistics or error counters are provided. The output only shows current leases, so the address pool could still have many available addresses.
- ✗
The clients are using DHCPv6.
Why it's wrong here
DHCPv6 uses a DUID (DHCP Unique Identifier) as the client identifier, which is a longer 14-byte or more format, typically starting with '00:01' for DUID-LLT or '00:03' for DUID-EN. The client identifiers in the output are short, 6-byte MAC addresses in binary format, typical of DHCPv4. Additionally, DHCPv6 uses different option types and does not carry the 'client-id' in the same way as DHCPv4.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 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 350-401 exam.