mediumMultiple ChoiceObjective-mapped
DHCP Pool Exhaustion and Utilization
A network engineer runs the following command on Router R1:
R1# show ip dhcp pool POOL1
Pool POOL1 : Utilization mark (high/low) : 100 / 0 Subnet size (first/next) : 0 / 0 Total addresses : 10 Leased addresses : 10 Pending event : none 1 subnet is currently in the pool : Current index IP address range Leased addresses
192.168.1.11 192.168.1.10 - 192.168.1.19 10
Based on this output, which statement is correct?
Quick Answer
The correct statement is that the DHCP pool is fully utilized and no more addresses are available. This is because the output shows all ten addresses in the pool, ranging from 192.168.1.10 to 192.168.1.19, are currently leased, and the current index sits at 192.168.1.11, indicating the pool has wrapped past its first available address with no free leases remaining. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your ability to interpret DHCP pool exhaustion and utilization metrics from the show ip dhcp pool command, a common troubleshooting step for verifying address availability and detecting full pools. A frequent trap is misreading the current index as the next available address—remember, the index shows the last address used for allocation, not the next free one. Memory tip: “Index is past, not last”—if the index is beyond the first address and all addresses are leased, the pool is exhausted.
⚠ Common exam trap
The trap here is that candidates often misinterpret the 'Current index' as the next available address, but it merely indicates the last allocation point; the true indicator of exhaustion is the 'Leased addresses' equaling 'Total addresses'.
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 pool is fully utilized; no more addresses are available.
The output shows that all 10 addresses in the pool (192.168.1.10–192.168.1.19) are leased, and the current index is 192.168.1.11, which is beyond the first address. This means no free addresses remain, so the pool is fully utilized. Option B correctly states this condition.
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 pool has available addresses for new clients.
Why it's wrong here
All 10 addresses are leased.
- ✓
The DHCP pool is fully utilized; no more addresses are available.
Why this is correct
Leased addresses equal total addresses.
- ✗
The DHCP pool is configured with a /24 subnet.
Why it's wrong here
The range shows only 10 addresses.
- ✗
The DHCP server has a pending event causing address allocation to fail.
Why it's wrong here
Pending event is 'none'.
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Same concept, more angles
1 more way this is tested on 300-410
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer runs the following command to verify DHCPv4 pool configuration on router R1: R1# show ip dhcp pool DHCP_POOL Output: Pool DHCP_POOL : Utilization mark (high/low) : 100 / 0 Subnet size (first/next) : 0 / 0 Total addresses : 254 Leased addresses : 100 Pending event : none 1 subnet is currently in the pool : Current index IP address range Leased addresses 192.168.1.1 192.168.1.1 - 192.168.1.254 100 What does this output indicate?
easy- ✓ A.The DHCP pool has 254 addresses available, and 100 are currently leased.
- B.The DHCP pool is exhausted because 100 addresses are leased.
- C.The DHCP server is using a database agent to store leases.
- D.The DHCP pool has a utilization mark of 100%, meaning it is full.
Why A: The output shows 'Total addresses: 254' and 'Leased addresses: 100', meaning the pool contains 254 total addresses (the /24 subnet) and 100 are currently leased, leaving 154 available. The 'Utilization mark (high/low): 100 / 0' indicates the thresholds for alerts, not actual usage, and the pool is not exhausted.
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.