220-1201: CompTIA A+ Certification Exam: Core 1Demo

NFC (Near Field Communication) operates within a very short range of approximately 10 centimeters, while Bluetooth can connect devices up to 32 feet (10 meters) or more depending on class and version. Option D accurately describes this key difference. NFC is actually more power-efficient than Bluetooth, and both technologies can operate without initial pairing in certain modes.

Power over Ethernet (PoE) is the technology standard that allows a single Ethernet cable to carry both data and electrical power to a connected device such as an access point or IP camera. A PoE injector is the hardware device used to add that electrical current onto the data cable when the upstream switch does not natively supply PoE, making it the other component that physically delivers combined data-and-power over the cable.

Firmware is the embedded software that controls a multifunction printer's hardware and functions. When manufacturers release updates to address bugs or improve functionality like scan-to-email, they distribute firmware updates. Drivers and OS updates operate on the client computer, not the printer's internal systems.

S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) errors indicate impending or existing hard disk failure. When a drive shows S.M.A.R.T. errors, replacement is the appropriate action. Reseating cables or running disk utilities will not address hardware failure.

Mini LED backlighting permits a greater number of independently controlled local-dimming zones, improving localized brightness control and contrast.

Redundant server power supplies provide fault tolerance only when they use independent power paths. Connecting them to outlets on different UPS units prevents a single UPS or power-feed failure from shutting down the server.

A hard drive that passes diagnostics can still be unbootable when the firmware boot mode does not match the disk's boot configuration. Configuring the BIOS for UEFI allows firmware to boot an operating system installed with a UEFI/GPT boot layout; Secure Boot settings, replacing the drive with NVMe, and upgrading the operating system do not correct that boot-mode mismatch.

The fans are already running loudly (working near their limit) yet CPU temperature still climbs to a dangerous 98°C under load, indicating the existing heat sink lacks the thermal dissipation capacity for the workload rather than a fan-speed or power problem. Installing a higher-performance heat sink increases cooling capacity and resolves the overheating-related shutdowns; the power supply and additional RAM have no direct bearing on CPU temperature.

IEEE 802.11ac, also called Wi‑Fi 5, operates in the 5 GHz spectrum. Bluetooth typically operates at 2.4 GHz, NFC at 13.56 MHz, and RFID uses varying frequency bands depending on its implementation.

A solid-state drive (SSD) stores data on NAND flash memory and is designed for high-capacity persistent storage. HDDs and tape rely on magnetic media, and DVD-RW discs use optical storage.

A line that appears only in scanned or copied output indicates contamination on the scanner glass rather than a printing-path fault. Dust, smudges, or debris on the flatbed glass can distort the scanned image and create lines, while direct printing remains unaffected. Cleaning the flatbed glass removes that source of the defect.

HDCP is supported by digital display connections such as DisplayPort. VGA and DVI-A carry analog video, while F-type connectors are used for coaxial RF signals.

A vendor-hosted, managed database is a Platform as a Service (PaaS) offering because the provider supplies and operates the database platform and its underlying infrastructure, while the organization consumes the database service.

An NTP server provides a common time reference that devices can use to synchronize their system clocks.

Virtual Desktop Infrastructure centralizes desktop management on a centralized server, allowing IT administrators to deploy, configure, and update virtual desktops from a single control point. This significantly reduces manual configuration effort per workstation compared to managing individual physical devices. Domain authentication is still required, licensing costs may increase, and VDI does not automatically isolate viruses.

A disabled port indicates software-level configuration on network equipment. Managed switches allow administrators to log in and enable/disable individual ports through their management interface for security and bandwidth control. Patch panels are passive physical patch points, a physical NIC cannot disable itself, and firewalls block traffic but do not control individual switch ports.

F-type connectors are the industry-standard threaded connectors for coaxial cable used in cable internet (broadband) and cable television deployments. DB9 is a serial connector, ST is a fiber optic connector, and RJ45 is used for twisted-pair Ethernet.

A CNAME record aliases one hostname to another canonical hostname, allowing multiple DNS names to resolve to the same host. An A record instead maps a hostname directly to an IPv4 address.

CompTIA troubleshooting methodology isolates the problem systematically. Since power is confirmed (lights and fan operational), connecting an external monitor determines whether the issue is with the laptop's internal display hardware (LCD, ribbon cable, inverter) or internal graphics processing. This single test definitively narrows the failure scope.

Because the environment mixes Windows, Linux, and Unix operating systems, only a hypervisor can consolidate them, since containers share the host OS kernel and cannot run guest operating systems from a different kernel family on the same host. Installing a Type 2 hypervisor on the existing bare-metal hardware isolates each OS in its own virtual machine, keeps data on-premises for privacy, and avoids the recurring subscription costs associated with cloud IaaS or VDI.

An SSD addresses both symptoms: insufficient storage space for application installation and slow application load times. SSDs provide both ample capacity and dramatically faster read/write performance compared to traditional mechanical drives. USB (B) is not permanent storage, HDD (C) would address capacity but not performance, and RAM (D) does not solve either issue.

Re-pairing clears an invalid or stale Bluetooth pairing relationship and establishes a new authenticated connection between the phone and headset. Wi-Fi settings do not govern Bluetooth connectivity, and entering a PIN is only applicable if pairing specifically prompts for one.

A swollen smartphone is almost always caused by a failing lithium-ion battery that has degraded and generated gas, causing the battery to expand. This is a safety hazard requiring immediate battery replacement. Upgrading RAM, changing the case, or factory reset do not address the underlying battery degradation.

A print failure isolated to one report produced by one custom application, while other documents print correctly and reinstalling the printer driver does not help, indicates an application-specific defect. The application can generate a print job that causes the spooler to fail, so the developer must correct the application or report-generation bug. Microsoft notes that a successful print test can confirm the printer driver is correct and point to the application as the cause.