The answer is a parabolic dish antenna on the 5 GHz frequency band. This combination is correct because directional antennas like parabolic dishes provide the high gain and narrow beamwidth needed to focus the signal over the 500-meter distance, while the 5 GHz band offers higher data capacity and less congestion than 2.4 GHz, making it capable of supporting the required 1 Gbps throughput. On the CompTIA A+ Core 1 220-1201 exam, this question tests your understanding of wireless standards and antenna selection for point-to-point bridges; a common trap is choosing 2.4 GHz due to its longer range, but the exam emphasizes that 5 GHz with a directional antenna is superior for high-speed, long-distance links when line of sight is clear. Remember the memory tip: “5 GHz for speed, dish for distance.”
220-1201 Wireless Networking Technologies Practice Question
This 220-1201 practice question tests your understanding of wireless networking technologies. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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 is deploying a point-to-point wireless bridge between two buildings 500 meters apart. The link must support at least 1 Gbps throughput. Both buildings have clear line of sight. Which antenna type and frequency combination is most appropriate?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Parabolic dish antennas on 5 GHz
For long-distance point-to-point links, directional antennas (like parabolic or grid) on the 5 GHz band provide high gain and focused signal, achieving high throughput over distance. 2.4 GHz has more interference and lower capacity.
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.
✗
Omnidirectional antennas on 2.4 GHz
Why it's wrong here
Omnidirectional antennas spread signal in all directions, reducing effective range and throughput for a point-to-point link.
✗
Yagi antennas on 2.4 GHz
Why it's wrong here
Yagi antennas are directional but 2.4 GHz has less bandwidth and more interference, making 1 Gbps unlikely.
✓
Parabolic dish antennas on 5 GHz
Why this is correct
Parabolic dishes provide high gain and narrow beamwidth, ideal for long-distance links, and 5 GHz offers higher data rates to achieve 1 Gbps.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Patch antennas on 5 GHz
Why it's wrong here
Patch antennas are semi-directional but typically have lower gain than parabolic dishes, which may not sustain 1 Gbps over 500 meters.
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.
Wireless Networking Technologies — This question tests Wireless Networking Technologies — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Parabolic dish antennas on 5 GHz — For long-distance point-to-point links, directional antennas (like parabolic or grid) on the 5 GHz band provide high gain and focused signal, achieving high throughput over distance. 2.4 GHz has more interference and lower capacity.
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.
Are there clue words in this question I should notice?
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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