CompTIA A+ Practice Test (220-1101)

Using application virtualization to run the legacy software allows the company to continue using the outdated application on modern operating systems without the risk of running an unsupported OS on their hardware. This ensures the application is isolated from the host OS, thus mitigating any potential security risks associated with the old software.

The correct answer is DHCP (Dynamic Host Configuration Protocol), since it is the role a server takes to dynamically distribute network configuration parameters, such as IP addresses, for interfaces and services. With DHCP, client machines can “lease” an IP address for a certain period of time. DNS (Domain Name System) serves as the phonebook for the internet, translating domain names to IP addresses, not dynamically assigning them. Syslog is used for logging and monitoring network devices, not for assigning IP addresses. A fileshare server is used for storing and sharing files, not assigning IP addresses.

When pairing two devices over Bluetooth, typically only one of the devices needs to be set to discoverable mode. The other device, which initiates the connection, scans for available devices and does not need to be discoverable itself. This question might trip up individuals who associate 'discoverability' as a requirement on both sides, which is not the case in most Bluetooth pairing scenarios.

Server Message Block (SMB)/Common Internet File System (CIFS) is the protocol commonly used for file sharing over a network between Windows-based systems. The default port used for SMB/CIFS is port 445. Ensuring that this port is open on both client and server firewalls is essential for file sharing to work properly. Other ports mentioned might be plausible in different scenarios, for example, FTP uses ports 20 and 21 for file transfer but is not typically the default protocol for Windows file sharing. Additionally, HTTP and HTTPS (ports 80 and 443, respectively) are related to web services and not typically used for Windows network file sharing directly. RDP (Remote Desktop Protocol) operates on port 3389 and is utilized for remote desktop connections, not file sharing.

The primary advantage of a setup using four separate pathways, known as a quad-channel configuration, is the increased bandwidth for data to move concurrently across all four channels. This arrangement offers better performance because it can handle more data transactions at once than what is achievable with fewer channels, thus providing significantly higher throughput rates.

OLED screens are known for their ability to produce deep blacks and high contrast ratios because they do not require a backlight — each pixel emits its own light. However, they are also susceptible to burn-in if static images are displayed for long periods. LCD and IPS screens use backlights and do not produce the same level of deep blacks as OLED screens, and while LCDs can suffer from burn-in, it's far less common than with OLED screens. TN and VA screens are types of LCD screens that also don't match the characteristics described for deep blacks and are not as prone to burn-in as OLED.

Calibrating the touch screen can resolve issues where the touch input does not align with the display's visual output or are not working. This step is necessary to ensure that the touch input accurately corresponds to the correct location on the screen. Given drivers are up to date and the device is enabled in system settings, this is the logical next step in troubleshooting before trying more drastic methods like replacing hardware.

The technician should add another 4GB module that matches the specifications of the current memory. This action takes advantage of the laptop's support for a dual-channel configuration, which effectively doubles the available memory bandwidth when two identical modules are used in paired slots.

LCD, LED & OLED are common screen types that support multiple colors. E Ink screens are used for eReaders and support only black & white.

Securing communication using a user authentication system is indeed considered best practice. It prevents unauthorized usage and allows for tracking of printer activity, crucial in office environments where sensitive documents are handled. This ensures that only authenticated users can access the multifunction device and helps in maintaining print security, auditing, and accounting for all the jobs processed by the device.

A Metropolitan Area Network (MAN) is designed to extend over an entire city or metropolitan area, allowing multiple Local Area Networks to communicate across a larger geographic area than a LAN could cover, but not as extensive as a Wide Area Network (WAN). A MAN is often used by local governments, city utilities, or large organizations to connect offices that are spread throughout a city.

A sandbox is used for safe testing of software or code in an isolated environment that mimics the end operating environment without affecting the host system. This is a security measure that prevents potentially harmful software from having an impact on the host system or other networks.

Non-volatile Memory Express (NVMe) leverages the high speeds of PCIe lanes to provide faster data transfer rates compared to SATA and other interfaces. This makes it the ideal choice for a gaming PC requiring quick load times for graphics-intensive games. Though SATA and PCIe also interface with the motherboard, they do not offer the same level of performance for an SSD as NVMe. mSATA was designed for small form factor devices and is not optimal for high performance, hence not suitable for this scenario.

Given the firm's priority for confidentiality and the need for robust performance, using an Ethernet-based configuration is the best means to connect the multifunction printer to the network. Ethernet connections provide a stable and high-speed interface, which can handle large volumes of data traffic without significant packet loss – crucial during extensive print and scan tasks. Furthermore, Ethernet allows for network segmentation and advanced security protocols that can help safeguard sensitive documents. USB would not serve multiple network users efficiently. While Wi-Fi with WPA3 could offer reasonable security and serve multiple users, it may be less reliable than Ethernet in terms of stability and consistent speed. Wi-Fi Direct creates a point-to-point network but generally lacks the scalability and the advanced security features required for a law firm's environment.

If there are no staple jams, then it's possible that the staple cartridge is either empty or improperly installed. This could prevent the stapler from functioning even if there are no obvious jams. Checking and replacing the staple cartridge or ensuring it is correctly installed should be the first troubleshooting step. A fault in the printer's firmware is less likely if other functions are performing correctly, and checking for software updates could be a preventative measure but not an immediate solution to the problem. While power cycling the device may resolve some issues, it's unlikely to solve a problem specific to the stapler function if everything else is working properly.