- A
HTTP
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.
Question 613 of 1,020
HTTP Blocked Printer Web Interface Troubleshooting
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.
Quick Answer
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.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HTTP
The technician can ping the print server (ICMP success) but cannot connect to the printer's web interface via its IP address. The web interface uses HTTP (port 80) or HTTPS (port 443). Since ICMP is working but HTTP is not, the most likely issue is that HTTP traffic is being blocked by a firewall or the HTTP service on the printer is malfunctioning. This directly points to HTTP as the blocked or malfunctioning protocol.
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
- ✗
UDP
- ✗
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
CompTIA often tests the distinction between ICMP (ping) success and application-layer protocol failure, trapping candidates who assume that a successful ping guarantees full network connectivity to all services.
Detailed technical explanation
How to think about this question
HTTP (Hypertext Transfer Protocol) operates over TCP port 80 by default, and the printer's embedded web server listens on this port for configuration and status requests. A firewall rule that permits ICMP (ping) but denies TCP port 80 is a common security configuration that allows basic reachability checks while blocking management access. In real-world scenarios, administrators often use 'telnet <printer-IP> 80' or 'curl -I http://<printer-IP>' to test HTTP connectivity specifically, as ping alone cannot verify application-layer services.
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.
TExam Day Tips
- 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
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 — The technician can ping the print server (ICMP success) but cannot connect to the printer's web interface via its IP address. The web interface uses HTTP (port 80) or HTTPS (port 443). Since ICMP is working but HTTP is not, the most likely issue is that HTTP traffic is being blocked by a firewall or the HTTP service on the printer is malfunctioning. This directly points to HTTP as the blocked or malfunctioning protocol.
What should I do if I get this 220-1201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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Last reviewed: Jul 4, 2026
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