The correct answer is to mount the ISO file as a virtual CD/DVD drive and boot the virtual machine from it. This works because an ISO file is an exact digital copy of an optical disc, and hypervisors like VMware or VirtualBox can treat it as a physical drive, allowing the VM’s BIOS to read it during startup just like a real installation disc. On the CompTIA A+ Core 2 220-1202 exam, this question tests your understanding of virtual media attachment versus physical media, and a common trap is thinking you can simply copy the ISO to the virtual hard disk or use a USB passthrough—neither triggers the boot sequence correctly. Remember, the hypervisor’s default settings only affect supported guest OS templates, not the ISO’s compatibility, so mounting is always the direct method. A helpful memory tip: “ISO = In Silico Optical,” meaning you treat it exactly like a real disc in the drive tray.
220-1202 Virtualization and Cloud Technologies Practice Question
This 220-1202 practice question tests your understanding of virtualization and cloud technologies. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A technician needs to deploy a virtual machine for a client who requires a specific operating system that is not supported by the hypervisor's default settings. The technician has the ISO file for the OS. What should the technician do to install the OS on the VM?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Mount the ISO file as a virtual CD/DVD drive and boot from it.
This question tests the process of installing an OS on a VM. The correct method is to mount the ISO file as a virtual optical drive and boot from it. Copying the ISO to the virtual disk or using a USB drive would not work directly, and the hypervisor's default settings are not relevant to OS compatibility.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Copy the ISO file directly to the virtual hard disk.
Why it's wrong here
Copying the ISO to the virtual disk would not make it bootable; the VM needs to boot from the ISO.
✓
Mount the ISO file as a virtual CD/DVD drive and boot from it.
Why this is correct
Mounting the ISO as a virtual optical drive allows the VM to boot from it and begin the OS installation process.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use a USB flash drive with the ISO and plug it into the host.
Why it's wrong here
USB passthrough might work but is more complex and not the standard method; mounting the ISO is simpler and more reliable.
✗
Change the hypervisor's default settings to support the OS.
Why it's wrong here
Hypervisor settings do not determine OS compatibility; the installation media must be provided via ISO.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1202 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1202 NAT questions on configuration and troubleshooting.
Virtualization and Cloud Technologies — This question tests Virtualization and Cloud Technologies — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Mount the ISO file as a virtual CD/DVD drive and boot from it. — This question tests the process of installing an OS on a VM. The correct method is to mount the ISO file as a virtual optical drive and boot from it. Copying the ISO to the virtual disk or using a USB drive would not work directly, and the hypervisor's default settings are not relevant to OS compatibility.
What should I do if I get this 220-1202 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1202 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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