The answer is secure web browsing (HTTPS). Port 443 is the default port for HTTPS, which encrypts web traffic using TLS/SSL to protect data like passwords and credit card numbers during transmission. When a technician sees an established connection to an external IP on port 443 from PID 3400, it indicates that a specific process—likely a web browser or a secure application—is actively using an encrypted HTTPS connection. On the CompTIA ITF+ FC0-U61 exam, this question tests your ability to map common ports to their services, a core objective in the networking domain. A common trap is confusing port 443 with port 80 (HTTP) or port 22 (SSH), so remember that HTTPS always uses 443 for secure web browsing. A helpful memory tip: think of "443" as "4-4-3" for "Four Secure Layers" (TLS/SSL), keeping your browsing safe.
FC0-U61 IT Concepts and Terminology Practice Question
This FC0-U61 practice question tests your understanding of it concepts and terminology. 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.
Exhibit
Refer to the exhibit.
C:\Users\jsmith> netstat -ano
Active Connections
Proto Local Address Foreign Address State PID
TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 1056
TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:3389 0.0.0.0:0 LISTENING 1200
TCP 192.168.1.100:49152 52.84.12.34:443 ESTABLISHED 3400
TCP 192.168.1.100:49153 10.0.0.5:80 TIME_WAIT 0
Refer to the exhibit. A technician sees an established connection to an external IP on port 443 from PID 3400. What is the most likely purpose of this connection?
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
✓
Secure web browsing (HTTPS)
Port 443 is the default port for HTTPS (HTTP over TLS/SSL), which is used for secure web browsing. PID 3400 indicates a specific process, likely a web browser or an application making an encrypted HTTPS connection to an external IP. This matches the purpose of secure web browsing.
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.
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse port 443 with other common services like SMB or RDP, or assume any encrypted connection is SSH (port 22), but the question specifically ties port 443 to HTTPS, which is the standard for secure web traffic.
Detailed technical explanation
How to think about this question
HTTPS uses TLS/SSL to encrypt HTTP traffic, ensuring confidentiality and integrity of data in transit. The connection is established via a TCP handshake followed by a TLS handshake, where the client and server negotiate cipher suites and exchange certificates. In a real-world scenario, a process like a web browser or a system update service (e.g., Windows Update) would use port 443 to securely communicate with an external server.
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 FC0-U61 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.
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Secure web browsing (HTTPS) — Port 443 is the default port for HTTPS (HTTP over TLS/SSL), which is used for secure web browsing. PID 3400 indicates a specific process, likely a web browser or an application making an encrypted HTTPS connection to an external IP. This matches the purpose of secure web browsing.
What should I do if I get this FC0-U61 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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Question Discussion
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