The answer is to deploy a local VDI broker or caching server at the remote office. This is the most effective solution because high latency, such as the 150 ms delay described, dramatically slows down the round-trip time required for authentication and resource loading during login. By placing a broker or cache locally, you eliminate the need for every login request to traverse the slow WAN link, drastically improving performance. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of how network latency impacts cloud-based services and the principle of bringing resources closer to the user. A common trap is to choose WAN optimization or a CDN, but those are secondary fixes; the exam wants you to recognize that a local broker directly addresses the high-latency bottleneck for VDI logins. Remember the memory tip: “Local broker, faster locker”—when latency is high, keep the login handshake nearby.
220-1101 Cloud Computing Concepts Practice Question
This 220-1201 practice question tests your understanding of cloud computing concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 company's cloud-based virtual desktop infrastructure (VDI) is experiencing slow logins for users in a remote office. The network latency between the remote office and the cloud data center is 150 ms. What is the most effective solution to improve login performance?
Why wrong: Bandwidth affects throughput, not latency; increasing bandwidth won't reduce the 150 ms delay.
B
Upgrade the cloud VDI servers to faster CPUs
Why wrong: Server performance affects processing time, but the primary bottleneck is network latency, which is not addressed by faster CPUs.
C
Deploy a local VDI broker or caching server at the remote office
A local broker can cache login profiles and reduce the need for frequent round trips to the cloud, significantly improving login speed.
D
Switch to a different cloud provider
Why wrong: Changing providers may not reduce latency unless the new provider has a data center closer to the remote office, but this is not guaranteed and is a drastic measure.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy a local VDI broker or caching server at the remote office
High latency significantly impacts VDI performance, especially during login when many resources are loaded. Deploying a local VDI broker or caching server at the remote office reduces round-trip time. Alternatively, using a CDN or WAN optimization can help, but a local broker is most effective for VDI.
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.
✗
Increase the bandwidth at the remote office
Why it's wrong here
Bandwidth affects throughput, not latency; increasing bandwidth won't reduce the 150 ms delay.
✗
Upgrade the cloud VDI servers to faster CPUs
Why it's wrong here
Server performance affects processing time, but the primary bottleneck is network latency, which is not addressed by faster CPUs.
✓
Deploy a local VDI broker or caching server at the remote office
Why this is correct
A local broker can cache login profiles and reduce the need for frequent round trips to the cloud, significantly improving login speed.
Related concept
Static NAT maps one inside address to one outside address.
✗
Switch to a different cloud provider
Why it's wrong here
Changing providers may not reduce latency unless the new provider has a data center closer to the remote office, but this is not guaranteed and is a drastic measure.
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 220-1201 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 220-1201 NAT questions on configuration and troubleshooting.
Cloud Computing Concepts — This question tests Cloud Computing Concepts — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Deploy a local VDI broker or caching server at the remote office — High latency significantly impacts VDI performance, especially during login when many resources are loaded. Deploying a local VDI broker or caching server at the remote office reduces round-trip time. Alternatively, using a CDN or WAN optimization can help, but a local broker is most effective for VDI.
What should I do if I get this 220-1201 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 220-1201 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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