Encryption protects files by converting them into unreadable formats unless the correct decryption key is provided. The CompTIA ITF+ FC0-U71 Official Study Guide explains:
* " Encryption is the process of converting data into a secure format that cannot be read without a decryption key. Only users with the proper key can access the original data. "
* File permissions control user access based on OS-level rules, but encryption specifically ensures that only those with the key can read the file even if they access the file storage.
* Hidden folders merely conceal files but don't protect content. Compression reduces file size but doesn't protect access.
Reference: CompTIA ITF+ FC0-U71 Official Study Guide, Chapter 10 - Security Concepts.
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The CompTIA Tech+ Study Guide (Exam FC0-U71, 3rd Edition, 2025) defines hexadecimal as follows:
"The hexadecimal notational system, or base-16... In hex, the numbers 0 to 9 are used, just like in decimal.
However, the letters A to F are used to represent decimal numbers 10 through 15." This directly confirms that hexadecimal uses digits 0-9 and letters A-F.
Verified Reference:
* Chapter 6: Software Development Concepts - "Notational Systems" (pp. 357-359).

According to the CompTIA Tech+ Study Guide (Exam FC0-U71, 3rd Edition, 2025), the SFP (Small Form- Factor Pluggable) connector is directly associated with fiber-optic networking. The guide lists:
"SFP (small form-factor pluggable) connectors are commonly used in fiber-optic connections to allow hot- swappable transceivers for different types of fiber cables." Additionally, the same guide's chapter on Networking Concepts and Technologies explains:
"Fiber-optic around 2 Gbps - Incredibly fast and more expensive than DSL or cable." Therefore, fiber Internet is the only service type that uses SFP connectors for data transmission over optical cables.
Verified Reference:
* Chapter 8: Networking Concepts and Technologies - "External network connections" and "Common Internet connection types and speeds" (pp. 429-435).
* Chapter 2: Peripherals and Connectors - "SFP (small form-factor pluggable) connectors" (pp. 97-98).

A LAN (Local Area Network) connects devices in a limited geographical area such as a building or office.
"A LAN is a network that connects computers within a small geographical area such as a home, school, or office building." - CompTIA ITF+ Networking Fundamentals Correct answer: C

In CompTIA Tech+ Study Guide (Exam FC0-U71, 3rd Edition, 2025), the section "Reviewing Throughput Speeds" explains:
"The most basic measure of throughput is in bits per second (bps)-that is, how many bits are transmitted across the network media (or wireless connection) any given second. Each of the following designations increases that speed by 1000 times:
# Kilobits per second (Kbps)
# Megabits per second (Mbps)
# Gigabits per second (Gbps)
# Terabits per second (Tbps)"
This shows that Mbps (megabits per second) is the standard measurement unit for Internet connection speed.
* 802.11X is a wireless security standard,
* MHz measures processor frequency, and
* Bytes measure data size, not transfer rate.
Verified Reference:
* Chapter 8: Networking Concepts and Technologies - "Reviewing Throughput Speeds" (pp. 424-425).
* Chapter 2: Peripherals and Connectors - "Throughput units of measure" (p. 80).