CompTIA A+ Practice Test (220-1201)

A Bluetooth speaker pairs wirelessly with the tablet using short-range radio, so the speaker can operate without occupying the USB-C charging port. Because Bluetooth is a peer-to-peer technology, it does not depend on Wi-Fi availability. USB-C speakers would block the charging port, NFC does not support continuous high-quality audio streaming, and a 3.5 mm wired speaker requires a headphone jack that many modern tablets no longer provide and still adds a physical cable that limits mobility.

In IPv4 each octet is 8 bits, so its decimal value must be between 0 and 255. Because the second octet in 172.256.1.15 is 256, the address is syntactically invalid and the operating system rejects it. APIPA addresses (169.254.x.x) are unrelated because you are manually configuring a static IP. Likewise, DHCP plays no role in this manual assignment, and there is no requirement that a Class B network (172.x.x.x) use its historical default subnet mask (255.255.0.0); using a Class A mask with a Class B address is legal but uncommon. Therefore, the only real problem is the invalid octet value.

Telnet provides remote command-line access but transmits all data, including credentials, in plain text. Telnet sessions use TCP port 23. Blocking inbound and outbound traffic on TCP 23 prevents new Telnet connections to devices on the network without affecting services that rely on other ports, such as SSH (TCP 22), DNS (UDP 53), or Remote Desktop Protocol (TCP 3389).

Because this is an existing system and the operating system files themselves are probably still present, the most common cause of the message is a damaged boot record or partition table. Rebuilding the Master Boot Record (MBR)-or the corresponding boot data on a GUID Partition Table (GPT) disk-restores the information that the firmware uses to locate and start the OS boot loader. Rebooting rarely fixes a corrupted boot sector, resizing partitions with diskpart will not repair boot code, and chkdsk targets file-system errors rather than boot-sector corruption.

A hard drive with a 5,400rpm specification is typically more energy-efficient and operates quieter compared to higher RPM drives, making it suitable for an office environment where energy conservation and noise reduction are prioritized over the higher performance of faster drives.

The Dynamic Host Configuration Protocol (DHCP) is a client-server protocol built into most SOHO routers. When a device joins the network, the DHCP server on the router leases an IP address along with the subnet mask, default gateway, and often DNS server information. This dynamic process eliminates the need for administrators or users to configure these settings manually and allows devices to join or leave the network seamlessly.

The first and most common action to address a biometric sensor issue is to ensure the sensor is clean, as oils, dirt, and dust from fingers can cause the scanner to fail to recognize a fingerprint. Updating the biometric device drivers or re-enrolling the fingerprints are valid subsequent steps if cleaning the sensor does not resolve the issue, but they are not the initial action to take.

The ATX form factor is suitable for workstations that require high performance and expandability. ATX motherboards offer more expansion slots for multiple graphics cards and peripherals which is important for graphic design and 3D modeling tasks. Additionally, the larger ATX size allows for better airflow, which is ideal for systems that may generate more heat due to the high-performance components involved. The microATX is smaller than ATX with fewer expansion slots, not optimal when many are required. Mini-ITX is much smaller than both ATX and microATX, usually with only one expansion slot, which would not fulfill the requirement for multiple graphics cards. E-ATX (Extended ATX) is a valid option for even more room and expandability, but it's not listed among the choices provided.

The 4-pin Molex connector was the standard for providing power to internal PATA (IDE) hard drives and optical drives. It delivers both +5V and +12V DC. While newer storage devices use the 15-pin SATA power connector, Molex connectors are still found on older power supplies and are sometimes used for other devices like case fans. USB-C and USB 3.0 are used for external peripherals, and the DB-9 connector is a legacy serial port used for data transfer, not internal power.

This issue is characteristic of burn-in, which is a common problem with OLED displays. It occurs when there is prolonged exposure to static images, causing some pixels to degrade more quickly than others, leading to uneven wear and a noticeable persistence of images or discoloration on the screen. Backlight bleed is associated with LCD panels, not OLED. Dead pixels would display as black spots on the display and wouldn't be affected by static images. Image persistence is a temporary issue often seen in LCD displays and differs from burn-in as it can usually be resolved by allowing the screen to display a moving image for some time.

By using Microsoft's Outlook app, the synchronization process with Microsoft 365 is done securely and efficiently, as it is designed to work seamlessly with Microsoft's email, calendar, and contact services, and often aligns with corporate security policies that may include remote management features and encryption. A third-party mail app may not always adhere to the corporate security policies, as it could lack certain security features or data handling protocols. Enabling only IMAP would synchronize emails only and not calendar or contact data. Lastly, manual setup using Exchange protocols could work but isn't recommended over the Outlook app, as it is more complex and error-prone.

Containers provide process-level isolation by packaging an application with its dependencies while sharing the host's OS kernel. This makes them lightweight, portable across environments, and extremely fast to start-ideal for microservices.

• Type 1 and Type 2 hypervisors run full guest operating systems, adding more overhead than necessary for this scenario.
• Virtual Desktop Infrastructure (VDI) delivers entire desktop sessions to users and is not designed for packaging individual microservices.

Therefore, containers are the best fit.

Rapid elasticity is an essential cloud characteristic. It allows a provider to automatically add or remove resources so the customer scales outward and inward with changes in demand, avoiding over-provisioning during normal workloads and adding capacity during peaks. Resource pooling, measured service, and broad network access are also important cloud characteristics, but they do not specifically describe on-demand scaling.

The public cloud meets the criteria given as it is hosted offsite by a service provider and offers scalable infrastructure and services over the internet with a pay-as-you-go billing model. Private cloud environments are generally hosted on-premises and managed internally, not typically offering pay-as-you-go pricing. Hybrid cloud combines on-premises private cloud and third-party public cloud services but is not exclusively managed over the internet by a third-party provider. Community cloud is a collaborative effort where the cloud infrastructure is shared between several organizations from a specific group with common computing concerns.

Storage I/O performance (measured in available IOPS and latency) is usually the primary bottleneck in an on-premises VDI environment. During boot, logon, antivirus scans and other "I/O storms," hundreds of desktops can generate intense, bursty disk traffic. If the shared storage array cannot deliver enough IOPS with low latency, desktops will feel sluggish no matter how much CPU, RAM or network capacity is available. Adequate LAN bandwidth and strong security are important, but they rarely limit user experience in a local deployment before storage throughput does.

The correct power connector to use in this scenario is the 24-pin motherboard power connector, which matches the 24-pin connector on the motherboard, ensuring proper fit and power distribution to the motherboard. A 20-pin connector cannot deliver the additional power required by ATX boards that use 24-pin configurations. While the others are also power connectors, EPS12V is used specifically for CPUs and lacks the correct pin count for the main motherboard power connection, and PCIe power connectors are meant for providing extra power directly to PCIe add-on cards, such as advanced video cards.

A firewall is a device that can be configured to permit or block traffic to help secure a computer network.

Application virtualization packages the program and any required registry or DLL files into an isolated runtime that is streamed to each workstation. The application launches from the host's Start menu and interacts with the user as if it were locally installed, but it remains separated from the underlying operating system, avoiding compatibility conflicts and keeping resource use low. Deploying a full Windows 7 virtual machine would satisfy compatibility but forces users to manage an entire guest OS and consumes far more CPU, RAM, and storage. A VDI pool likewise delivers a whole desktop session, exceeding the stated need and adding data-center dependencies. A Docker container is designed for Linux-based workloads and would still require a presentation layer for Windows applications, making it a poor fit in this context.

Enabling noise cancellation or suppression features in the sound settings can help reduce background noise during audio capture without affecting the clarity of the primary audio source, which in most cases would be the user's voice. Updating the operating system or disabling other devices would not directly address the issue of noise in the audio capture. Playing with advanced equalizer settings may help to some extent but is not the most effective method to deal with noise issues compared to using built-in noise reduction features.

A redundant power supply system in a high-availability server environment is primarily designed to provide a failover option in the event of a power supply unit (PSU) failure. This ensures that the server continues to operate, significantly reducing downtime. Other advantages like improved efficiency or increased power output can be misinterpreted as primary benefits but they are secondary to the need for redundancy, which focuses mainly on maintaining uptime in response to PSU failures.