220-1101 Networking Practice Question
A network administrator is configuring a DHCP scope on a Windows Server for a new subnet. The administrator wants to ensure that a specific printer always receives the same IP address without manually configuring the printer. Which of the following should be used?
⚠ Common exam trap
The trap here is thinking that a longer lease duration or exclusion range will guarantee a fixed IP, but only a reservation provides a permanent mapping based on MAC address.
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
✓
DHCP reservation
A DHCP reservation ensures a device always receives the same IP by mapping its MAC address to a specific address. This meets the requirement of no manual configuration on the printer while providing consistency. Static IP, exclusion range, and longer leases do not achieve the same centralized, automatic guarantee.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Exclusion range
Why it's wrong here
An exclusion range prevents the DHCP server from assigning certain IPs, but it does not automatically assign a specific IP to a device. The printer would still need a static IP or a reservation. Exclusions are used to reserve addresses for other purposes, not for dynamic assignment.
- ✗
Static IP configuration on the printer
Why it's wrong here
Configuring a static IP on the printer would work, but the requirement is to avoid manual configuration on the printer. A DHCP reservation centralizes control and avoids potential IP conflicts, which is preferable in larger networks.
- ✓
DHCP reservation
Why this is correct
A DHCP reservation ties a specific MAC address to an IP address within the scope. When the printer requests an IP, the DHCP server always assigns the reserved address. This achieves a consistent IP without static configuration on the printer, simplifying management.
- ✗
Longer lease duration
Why it's wrong here
Increasing lease duration reduces the frequency of IP changes but does not guarantee the same IP forever. The printer could still receive a different IP if the lease expires or the server is reconfigured. A reservation provides a permanent assignment.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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