The hostname command-line tool is used to display the name of the local machine. This information can be crucial for identifying the device within a network, especially when setting up remote access or sharing resources like folders and printers. Unlike other command-line tools that provide more detailed network diagnostics or configuration details, hostname straightforwardly offers the device's network identification, making it suitable for the scenario described.References: Official CompTIA A+ Core 1 and Core 2 Student Guide.

Account lockout would best mitigate the threat of a dictionary attack1

Journaling is a feature that helps maintain the integrity of the filesystem by keeping a record of changes not yet committed to the main file system. This feature is supported by various filesystems, but not all.
* Option A: NTFSNTFS (New Technology File System) is a filesystem used by Windows that supports journaling. This makes it resilient to corruption from unexpected shutdowns or crashes by keeping a log of file changes.
* Option B: exFATexFAT (Extended File Allocation Table) does not support journaling. It is optimized for flash drives and large files but lacks advanced features like journaling.
* Option C: HFSHFS (Hierarchical File System) is an older filesystem used by Apple. HFS+ (also known as Mac OS Extended) supports journaling, but HFS itself does not.
* Option D: ext2ext2 (Second Extended File System) is a filesystem for Linux that does not support journaling. Its successor, ext3, introduced journaling.
References:
* CompTIA A+ 220-1102 Objective 1.8 (Explain common OS types and their purposes), particularly filesystems and their features.

Cross-site scripting (XSS) (Option C) allows attackers to inject malicious scripts into web pages viewed by users. When the user visits the compromised site, the script runs in the user's browser, potentially allowing the attacker to steal data or perform unauthorized actions. XSS is a common vulnerability in web applications that allows code execution.
* DoS (Option A) disrupts services but doesn't involve executing code on a user's device.
* Spoofing (Option B) involves impersonating another device or user but doesn't execute code.
* SQL injection (Option D) attacks a database and is unrelated to executing code on the user's computer.
CompTIA A+ Core 2 References:
* 2.4 - Explain common social engineering attacks, including XSS.

The technician should use DHCP reservation to maintain the same IP address for the server at all times.
DHCP reservation allows the server to obtain an IP address dynamically from the DHCP server, while ensuring that the same IP address is assigned to the server each time it requests an IP address.