Quick Answer
The correct answer is TLS, or Transport Layer Security, because it is the protocol specifically designed to encrypt data in transit between a web server and clients, ensuring both confidentiality and integrity. TLS operates over TCP and secures standard HTTP traffic as HTTPS, preventing eavesdropping and tampering by creating an encrypted tunnel for all exchanged data. On the CompTIA ITF+ FC0-U61 exam, this concept tests your understanding of network security fundamentals, often appearing in questions about securing web traffic or differentiating between encryption protocols. A common trap is confusing TLS with SSL, its deprecated predecessor, or with IPsec, which secures network-layer traffic rather than application-layer web data. To remember this, think of the “S” in HTTPS: it stands for Secure, and that security comes from TLS encrypting the connection between your browser and the server.
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.
A company wants to ensure that data transmitted between its web server and clients is encrypted. Which protocol should be used?
TLS
TLS provides encryption for secure communication.
FTP
Why wrong: FTP sends files without encryption.
SMTP
Why wrong: SMTP is used for email and does not inherently encrypt.
HTTP
Why wrong: HTTP transmits data in plain text.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
TLS
TLS (Transport Layer Security) is the correct protocol because it provides encryption for data in transit, ensuring confidentiality and integrity between a web server and clients. It operates over TCP and is commonly used to secure HTTP traffic as HTTPS, preventing eavesdropping and tampering.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
TLS
Why this is correct
TLS provides encryption for secure communication.
Related concept
Read the scenario before looking for a memorised answer.
FTP
Why it's wrong here
FTP sends files without encryption.
SMTP
Why it's wrong here
SMTP is used for email and does not inherently encrypt.
HTTP
Why it's wrong here
HTTP transmits data in plain text.
Common exam traps
The trap here is that candidates often confuse HTTP with HTTPS, assuming HTTP itself provides encryption, when in fact it is the TLS layer added on top that secures the communication.
Detailed technical explanation
TLS uses a handshake process involving asymmetric cryptography (e.g., RSA or ECDHE) to exchange session keys, then switches to symmetric encryption (e.g., AES) for bulk data transfer. In practice, a misconfigured TLS version (e.g., TLS 1.0) or weak cipher suite can still leave data vulnerable, as seen in attacks like POODLE or BEAST.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
The correct answer is: TLS — TLS (Transport Layer Security) is the correct protocol because it provides encryption for data in transit, ensuring confidentiality and integrity between a web server and clients. It operates over TCP and is commonly used to secure HTTP traffic as HTTPS, preventing eavesdropping and tampering.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U61 exam.
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