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220-1202 Practice Question: A technician is setting up a remote desktop…
A technician is setting up a remote desktop solution for a small business with five employees who need to access their office PCs from home. The office uses a dynamic public IP address. Which of the following should the technician configure to ensure reliable remote access without requiring users to remember a changing IP?
⚠ Common exam trap
The A+ exam often tests the distinction between internal static IPs (which are irrelevant for public access) and external static IPs (which require ISP involvement), leading candidates to mistakenly choose assigning static IPs on the office network as a solution for a dynamic public IP.
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
✓
Configure a dynamic DNS (DDNS) service
A dynamic DNS (DDNS) service maps a fixed hostname (e.g., remote.office.com) to the office’s changing public IP address. The technician configures the router or a client to update the DDNS provider automatically whenever the ISP-assigned IP changes, so employees can always connect using the same hostname without tracking the current IP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set up port forwarding on the router
Why it's wrong here
Port forwarding maps a fixed router port to an internal host, but the office's dynamic public IP still changes, so remote users cannot reliably reach it. It is tempting because port forwarding is the standard way to expose an internal RDP host; it would be correct if the ISP supplied a static public IP address.
- ✓
Configure a dynamic DNS (DDNS) service
Why this is correct
Dynamic DNS maps a fixed hostname to the office's changing public IP, updating the record automatically when the ISP reassigns it. Users then connect via the stable name, satisfying the requirement that they need not track a changing address.
- ✗
Assign each employee a static IP address on the office network
Why it's wrong here
Static private addresses on the office LAN only fix internal addressing; the dynamic public IP still changes, so home users cannot locate the network. It is tempting because static addressing removes DHCP lease changes internally. It would be correct for internal server or printer reachability, not for inbound remote access.
- ✗
Use a VPN with a static IP assigned by the ISP
Why it's wrong here
A VPN with an ISP-assigned static IP secures the tunnel but still requires users to know and connect to that fixed address, and it does not resolve name resolution for a changing address. It would be correct where the ISP already provides a static public IP and encrypted access is the priority.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1202 practice question is part of Courseiva's free CompTIA 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 220-1202 exam.