The answer is that the router’s MTU setting is too high, which is the most likely cause of the connectivity issue. Satellite internet connections typically require a lower Maximum Transmission Unit (MTU) than the default 1500 used by most terrestrial networks, because the higher latency and signal overhead of satellite links cause packets to fragment or drop when the MTU is set too high. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of how WAN technologies like satellite differ from standard broadband, and it often appears as a troubleshooting trap where the modem shows online but no data passes. A common memory tip is to think “satellite shrinks the packet”—remember that satellite providers usually need an MTU between 1400 and 1450 to avoid fragmentation and packet loss, so if web browsing fails after the dish is aligned, check the MTU first.
220-1101 Internet Connection Types Practice Question
This 220-1201 practice question tests your understanding of internet connection types. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 configuring a new satellite internet connection for a rural home. After aligning the dish, the modem shows 'online' but the user cannot browse the web. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The router's MTU setting is too high.
Satellite internet often uses a different MTU size than terrestrial connections, and the default MTU of 1500 can cause fragmentation issues. Additionally, the router must be configured for the satellite provider's specific MTU (usually around 1400-1450) to avoid packet loss.
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.
✗
The dish is not aligned properly.
Why it's wrong here
If the modem shows 'online', the dish is aligned and receiving signal; misalignment would prevent sync.
✓
The router's MTU setting is too high.
Why this is correct
Satellite connections require a lower MTU (e.g., 1400) to avoid fragmentation; a default MTU of 1500 can cause connectivity issues.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The modem's firmware is outdated.
Why it's wrong here
Outdated firmware might cause issues, but the modem is online, indicating basic functionality; MTU mismatch is more specific.
✗
The user's browser is incompatible.
Why it's wrong here
Browser incompatibility would not prevent all web browsing; it would affect specific sites or features.
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.
Trap categories for this question
Command / output trap
If the modem shows 'online', the dish is aligned and receiving signal; misalignment would prevent sync.
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.
Internet Connection Types — This question tests Internet Connection Types — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The router's MTU setting is too high. — Satellite internet often uses a different MTU size than terrestrial connections, and the default MTU of 1500 can cause fragmentation issues. Additionally, the router must be configured for the satellite provider's specific MTU (usually around 1400-1450) to avoid packet loss.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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