The answer is HTTP, as the blocked printer web interface points directly to a problem with the Hypertext Transfer Protocol. A successful ping confirms that the printer is reachable at the network and transport layers (ICMP and IP), so the issue must reside higher up in the application layer, where HTTP operates. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your ability to differentiate between connectivity (Layer 3) and service accessibility (Layer 7), a common trap where students assume a failed web interface means a dead device. Remember, a ping works but the web page doesn’t? Think HTTP, not hardware. A useful memory tip is “Ping is IP, web is HTTP”—if one works and the other doesn’t, the protocol for the web interface is the likely culprit.
220-1201 Network Protocols Practice Question
This 220-1201 practice question tests your understanding of network protocols. 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 small office uses a network printer that is shared via a print server. Users report that print jobs are not reaching the printer. The technician pings the print server successfully but cannot connect to the printer's web interface using its IP address. Which protocol is most likely blocked or malfunctioning?
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.
The web interface typically uses HTTP or HTTPS; if this protocol is blocked or the service is down, the interface becomes unreachable despite network connectivity.
B
TCP
Why wrong: TCP is a transport layer protocol; ping uses ICMP, which is also at the network layer. TCP connectivity may be fine, but the application protocol is the issue.
C
UDP
Why wrong: UDP is a transport protocol used by many services, but the printer's web interface relies on TCP-based HTTP.
D
SNMP
Why wrong: SNMP is used for network management, not for web interface access.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HTTP
This question tests understanding of the HTTP/HTTPS protocol used for accessing device management interfaces. Successful ping indicates IP connectivity, so the issue is likely with the application layer protocol (HTTP) used for the web interface.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
HTTP
Why this is correct
The web interface typically uses HTTP or HTTPS; if this protocol is blocked or the service is down, the interface becomes unreachable despite network connectivity.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
TCP
Why it's wrong here
TCP is a transport layer protocol; ping uses ICMP, which is also at the network layer. TCP connectivity may be fine, but the application protocol is the issue.
✗
UDP
Why it's wrong here
UDP is a transport protocol used by many services, but the printer's web interface relies on TCP-based HTTP.
✗
SNMP
Why it's wrong here
SNMP is used for network management, not for web interface access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Network Protocols — This question tests Network Protocols — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: HTTP — This question tests understanding of the HTTP/HTTPS protocol used for accessing device management interfaces. Successful ping indicates IP connectivity, so the issue is likely with the application layer protocol (HTTP) used for the web interface.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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?
Read the scenario before looking for a memorised answer.
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