CompTIA A+ 220-1201 Core 1 Vocabulary Review

Essential vocabulary flashcards covering networking, hardware, virtualization, cloud computing, and mobile devices from the CompTIA A+ 220-1201 Core 1 study guide.

NFC (Near-Field Communication)

A very short-range wireless communication technology used for tap-to-pay, pairing, and authentication.

MDM (Mobile Device Management)

A system used to remotely manage, secure, monitor, and enforce administrative policies on mobile devices.

BYOD (Bring Your Own Device)

A policy where employees use their personal devices for work, often utilizing MDM to separate corporate and personal data.

TCP (Transmission Control Protocol)

A connection-oriented transport protocol that emphasizes reliable, ordered packet delivery with acknowledgments.

UDP (User Datagram Protocol)

A connectionless, lighter-weight transport protocol commonly used for streaming, gaming, VoIP, DNS, and DHCP.

APIPA (Automatic Private IP Addressing)

A self-assigned link-local IPv4 addressing scheme that assigns an IP address in the $169.254.x.x$ range when a DHCP server cannot be reached.

PoE (Power over Ethernet)

A technology that transmits electrical power along with Ethernet data over compatible cabling.

QoS (Quality of Service)

A networking feature that prioritizes selected network traffic and applications over others.

RAID 0

A disk configuration that provides disk striping for increased speed but provides no redundancy.

RAID 1

A disk configuration that mirrors data between drives to provide redundancy.

RAID 5

A disk configuration that stripes data and distributed parity across drives to provide fault tolerance.

RAID 10

A nested disk configuration that combines drive mirroring and striping.

TPM (Trusted Platform Module)

A dedicated hardware security chip on the motherboard used for cryptographic key storage and system integrity verification.

Secure Boot

A UEFI firmware security standard that ensures a device boots using only software that is trusted by the manufacturer.

Type 1 Hypervisor

A bare-metal hypervisor that runs directly on physical host hardware without an underlying host operating system.

Type 2 Hypervisor

A hosted hypervisor that runs as an application on top of an existing host operating system.

Containers

Lightweight, isolated application execution environments that share the host operating system kernel and use fewer resources than full virtual machines.

VDI (Virtual Desktop Infrastructure)

A technology where desktop operating systems are hosted and run centrally on virtual machines and accessed remotely by end users.

IaaS (Infrastructure as a Service)

A cloud service model that rents virtualized computing infrastructure, including servers, storage, and network components.

PaaS (Platform as a Service)

A cloud service model providing an application development and deployment platform without requiring customers to manage the underlying infrastructure.

SaaS (Software as a Service)

A cloud service model where vendor-hosted applications are accessed directly by users over the Internet.

ADF (Automatic Document Feeder)

A printer and scanner component that automatically feeds multiple paper pages into the device for scanning or copying.

Jitter

The variation in packet arrival times over a network connection, which negatively impacts real-time traffic such as VoIP.

Docking Station

A stationary base that connects a laptop or mobile device to multiple peripherals, providing power and expanded system connectivity.

Port Replicator

A simple expansion device that primarily duplicates and extends the existing ports of a mobile computer.