CompTia A+ Core 1 STUDY SET 3 | QUESTIONS AND
CORRECT ANSWERS (VERIFIED AND WELL
DETAILED ANSWERS) LATEST UPDATE 2024/2025
*
ADF - ✔✔(Auto Document Feeder) Device that feeds media automatically into a
scanner or printer
ADSL - ✔✔(Asymmetrical DSL) A consumer version of DSL that provides a fast
downlink but a slow uplink. The upstream rate is between 64 Kbps and 1 Mbps and the
downstream rate is 500 Kbps to 8 Mbps
AES - ✔✔Advanced Encryption Standard) Modern encryption suite prove providing
symmetric encryption (the same key is used to encrypt and decrypt). AES is a very strong
cipher with many applications, including being part of the WPA2 Wi-Fi encryption
scheme.
AFP - ✔✔(Apple Filing Protocol) Protocol supporting file sharing on MacOS networks.
AFP works over TCP port 548
agent - ✔✔A process running on an SNMP compatible network device that sends
information to an SNMP manager.
AHCI - ✔✔(Advanced Host Controller Interface) A logical interface used by SATA
drives to communicate with the bus
airplane mode - ✔✔A toggle found on mobile devices enabling the user to disable
and enable wireless functionality quickly.
,all-in-one unit - ✔✔A desktop computer in which all the computer components,
except the keyboard and mouse, are contained within the monitor case.
ALU - ✔✔(Arithmetic Logic Unit) A circuit in the CPU that perfomrs integer-based
calculations and performs bit-wise logical calculations.
AMD-V - ✔✔Extension in AMD-based systems that allow hardware virtualization.
AMD64 - ✔✔AMD's 64-bit instruction set that was also adopted by Intel for its 64-bit
desktop and mobile line. Intel refer to it as EM64T or Intel 64
analog display - ✔✔A computer monitor that accepts continuously varying signals.
CRT monitors use analog signals and are capable of supporting several output
resolutions without losing quality.
Android application package - ✔✔(APK) Third-party or custom programs that are
installed directly through an APK file, giving users and businesses the flexibility to install
apps directly on Android devices.
Android Auto - ✔✔An Android phone feature that allows users to interact with their
phone using voice commands and a vehicle;s built-in display.
anti-glare cover - ✔✔A display cover to deal with ambient lighting issues on the
display.
antistatic bag - ✔✔A packaging material containing anti-ESD shielding or dissipative
materials to protect components from ESD damage
,AP - ✔✔(Access Point) A device that provides connectivity between wireless devices
and a cabled network. APs with Internet connectivity located in public buildings (cafes,
libraries, and airports, for instance) are often referred to as hotspots.
APIPA - ✔✔(Automatic Private IP Addressing) A means for Windows clients
configured to obtain an address automatically that could not contact a DHCP server to
communicate on the local subnet. The host randomly selects an address from the range
169.254.x.y. This is also called a link-local address.
App Store - ✔✔The online site where Apple users can purchase or get free apps that
have been submitted to and approved by Apple before they are released to users.
Apple CarPlay - ✔✔An iPhone feature that allows users to interact with their phone
using voice commands and a vehicle's built-in display.
Application protocols layer - ✔✔In the TCP/IP suite, numerous protocols used for
network configuration management, and services reside at this level. Application
protocols use a TCP or UDP port to connect the client and server.
application virtualization - ✔✔Rather than run the whole client desktop as a virtual
platform, the client either accesses a particular application hosted on a server or
streams the application from the server to the client for local processing.
apps - ✔✔Installable programs that extend the functionality of the mobile device
that must be written and compiled for a particular mobile operating system (Apple iOS,
Android, or Windows).
aaS - ✔✔(Something as a Service) An ownership model for cloud services where
"something" can refer to infrastructure, network, platform, or software
, 3D modeling software - ✔✔Software that creates a model of physical objects using
polygons, spline curves and bezel curves
3d print process - ✔✔A printing process that builds a solid object from successive
layers of material
3d printer - ✔✔Hardware device capable of small scale manufacturing. 3D printers
use a variety of filament media (typically plastic) with different properties.
3D scanner - ✔✔A scanner that can gather data about the shape and appearance of a
phsyical object and save that information to a computer
3D slicing software - ✔✔Software in a 3D printer or in 3D modeling software that
takes a 3D model and creates multiple horizontal layers of the model
802.3af - ✔✔PoE powered devices can draw up to about 13 W over the link. Power is
supplied as 350mA@48V and limited to 15.4 W, but the voltage drop over the maximum
100 feet of cable results in useable power of around 13 W.
802.3at (PoE+) - ✔✔PoE powered devices can draw up to about 25 W. PoE+ allows
for a broader range of devices to be powered such as cameras with pan/tilt/zoom
capabilities , door controllers, and thin client computers.
AC - ✔✔(alternating current) When electricity is produced by a generator at the
power station, the rotational movement of the magnetic coils causes the current
produced to oscillate like a sine wave (it is said to alternate). Computers require direct
current (at a constant voltage). A transformer is used to convert AC from the power
outlet into the 3.3, 5, and 12 V DC supply required by the computer
CORRECT ANSWERS (VERIFIED AND WELL
DETAILED ANSWERS) LATEST UPDATE 2024/2025
*
ADF - ✔✔(Auto Document Feeder) Device that feeds media automatically into a
scanner or printer
ADSL - ✔✔(Asymmetrical DSL) A consumer version of DSL that provides a fast
downlink but a slow uplink. The upstream rate is between 64 Kbps and 1 Mbps and the
downstream rate is 500 Kbps to 8 Mbps
AES - ✔✔Advanced Encryption Standard) Modern encryption suite prove providing
symmetric encryption (the same key is used to encrypt and decrypt). AES is a very strong
cipher with many applications, including being part of the WPA2 Wi-Fi encryption
scheme.
AFP - ✔✔(Apple Filing Protocol) Protocol supporting file sharing on MacOS networks.
AFP works over TCP port 548
agent - ✔✔A process running on an SNMP compatible network device that sends
information to an SNMP manager.
AHCI - ✔✔(Advanced Host Controller Interface) A logical interface used by SATA
drives to communicate with the bus
airplane mode - ✔✔A toggle found on mobile devices enabling the user to disable
and enable wireless functionality quickly.
,all-in-one unit - ✔✔A desktop computer in which all the computer components,
except the keyboard and mouse, are contained within the monitor case.
ALU - ✔✔(Arithmetic Logic Unit) A circuit in the CPU that perfomrs integer-based
calculations and performs bit-wise logical calculations.
AMD-V - ✔✔Extension in AMD-based systems that allow hardware virtualization.
AMD64 - ✔✔AMD's 64-bit instruction set that was also adopted by Intel for its 64-bit
desktop and mobile line. Intel refer to it as EM64T or Intel 64
analog display - ✔✔A computer monitor that accepts continuously varying signals.
CRT monitors use analog signals and are capable of supporting several output
resolutions without losing quality.
Android application package - ✔✔(APK) Third-party or custom programs that are
installed directly through an APK file, giving users and businesses the flexibility to install
apps directly on Android devices.
Android Auto - ✔✔An Android phone feature that allows users to interact with their
phone using voice commands and a vehicle;s built-in display.
anti-glare cover - ✔✔A display cover to deal with ambient lighting issues on the
display.
antistatic bag - ✔✔A packaging material containing anti-ESD shielding or dissipative
materials to protect components from ESD damage
,AP - ✔✔(Access Point) A device that provides connectivity between wireless devices
and a cabled network. APs with Internet connectivity located in public buildings (cafes,
libraries, and airports, for instance) are often referred to as hotspots.
APIPA - ✔✔(Automatic Private IP Addressing) A means for Windows clients
configured to obtain an address automatically that could not contact a DHCP server to
communicate on the local subnet. The host randomly selects an address from the range
169.254.x.y. This is also called a link-local address.
App Store - ✔✔The online site where Apple users can purchase or get free apps that
have been submitted to and approved by Apple before they are released to users.
Apple CarPlay - ✔✔An iPhone feature that allows users to interact with their phone
using voice commands and a vehicle's built-in display.
Application protocols layer - ✔✔In the TCP/IP suite, numerous protocols used for
network configuration management, and services reside at this level. Application
protocols use a TCP or UDP port to connect the client and server.
application virtualization - ✔✔Rather than run the whole client desktop as a virtual
platform, the client either accesses a particular application hosted on a server or
streams the application from the server to the client for local processing.
apps - ✔✔Installable programs that extend the functionality of the mobile device
that must be written and compiled for a particular mobile operating system (Apple iOS,
Android, or Windows).
aaS - ✔✔(Something as a Service) An ownership model for cloud services where
"something" can refer to infrastructure, network, platform, or software
, 3D modeling software - ✔✔Software that creates a model of physical objects using
polygons, spline curves and bezel curves
3d print process - ✔✔A printing process that builds a solid object from successive
layers of material
3d printer - ✔✔Hardware device capable of small scale manufacturing. 3D printers
use a variety of filament media (typically plastic) with different properties.
3D scanner - ✔✔A scanner that can gather data about the shape and appearance of a
phsyical object and save that information to a computer
3D slicing software - ✔✔Software in a 3D printer or in 3D modeling software that
takes a 3D model and creates multiple horizontal layers of the model
802.3af - ✔✔PoE powered devices can draw up to about 13 W over the link. Power is
supplied as 350mA@48V and limited to 15.4 W, but the voltage drop over the maximum
100 feet of cable results in useable power of around 13 W.
802.3at (PoE+) - ✔✔PoE powered devices can draw up to about 25 W. PoE+ allows
for a broader range of devices to be powered such as cameras with pan/tilt/zoom
capabilities , door controllers, and thin client computers.
AC - ✔✔(alternating current) When electricity is produced by a generator at the
power station, the rotational movement of the magnetic coils causes the current
produced to oscillate like a sine wave (it is said to alternate). Computers require direct
current (at a constant voltage). A transformer is used to convert AC from the power
outlet into the 3.3, 5, and 12 V DC supply required by the computer
