CompTIA Tech+ Practice Test (FC0-U71)

The statement is incorrect because a device using an Ethernet cable for networking is employing a wired connection, and therefore, it would require a wired NIC (Network Interface Card) to communicate with other devices on the network. A wireless NIC is used for establishing wireless connections, like Wi-Fi.

Rule-based access control is used to restrict system access to authorized users based on a set of rules defined by the system or network administrator. If a user's request doesn't match the pre-established rules, access to the system or network is denied, ensuring that only permissible actions are allowed.

Making your profile private and limiting post sharing to friends or trusted contacts helps maintain your privacy and reduces the risk of your information being misused. The other practices provided can compromise your security by exposing more of your information than intended.

A foreign key is used to link the records in one table to the records in another, establishing a relationship between the two tables. In this case, including a foreign key in the 'Employees' table that references the primary key of the 'Departments' table maintains data integrity by ensuring that each employee is associated with an existing department.

Methods are a set of instructions grouped together to perform a specific task or related operations within a program. When a method is called, the program executes these instructions. Understanding this allows programmers to organize code into reusable and logical segments. Methods are not the same as classes, which provide the structure for objects, nor are they the same as properties, which are used to store data within objects.

The answer correctly reflects the scenario where one department requires exclusive access to certain sensitive documents (in this case, employee records), and all other employees should have access to less sensitive materials, such as standard operational procedures. Implementing access controls that match these criteria without overextending permissions preserves both the confidentiality of sensitive documents and the availability of general information.

In most instant messaging applications, the 'status visibility' or 'presence feature' controls whether you can see if your contacts are online, busy, or away. If an employee cannot see their colleagues' statuses, they should first check if this feature is enabled in their application settings. The other options provided do not primarily affect the visibility of user statuses in the context of instant messaging software.

The correct answer is JavaScript. This is because JavaScript is a client-side scripting language commonly used to create interactive effects within web browsers, including dynamic content updates, form validation, and animated graphics. Perl, although a versatile scripting language, is more traditionally used for systems administration, text processing, and web development on the server side rather than client-side interactions in a browser. PHP is a server-side scripting language used mainly for web development. Lastly, CSS is used for defining the presentation of a web document written in HTML or XML, but it does not provide interactive functionalities.

A man-in-the-middle attack occurs when an attacker inserts themselves in the communication pathway between two parties without their knowledge. This allows the attacker to intercept, send, and receive data meant for someone else, thus compromising the integrity of the data being exchanged. It is crucial to identify this type of attack to take preventive measures and secure communication channels.

WPA2 (Wi-Fi Protected Access II) is the correct encryption standard to use for a secure Wi-Fi network because it offers a high level of security and is widely supported by modern devices. 'WEP' is an outdated and insecure encryption standard and should be avoided. 'WPA' was the predecessor to WPA2 and, while more secure than WEP, it is not as secure as WPA2. 'Open network' offers no encryption at all, leaving the network vulnerable to eavesdropping and unauthorized use.

Workstations are specifically designed to handle resource-intensive applications, such as graphic design software. They typically come equipped with high-performance CPUs, ample RAM, and powerful GPUs, making them ideal for tasks requiring significant processing power. Other options, while they can run such applications, are generally not optimized for the highest performance in graphic design.

Unicode is a character encoding standard that includes a much larger set of characters than ASCII, which allows it to represent most of the world's writing systems. This is essential for documents that require the use of characters from multiple languages that are not all covered by the ASCII character set. Binary is a number system that computers use to represent all types of data, but it is not a character encoding standard. Hexadecimal is often used as a human-friendly representation of binary data, especially in contexts such as color codes in HTML, but is not used for text character encoding. ASCII is limited to 128 characters, which is insufficient for encoding the characters of multiple languages.

The core feature that distinguishes a vector from other data structures is its ability to resize dynamically, accommodating more elements as needed. This is unlike a 'static array', which has a fixed size determined at the time of its creation and cannot grow or shrink. An 'object with dynamic properties' refers to the ability to add or remove properties from an object at runtime, which is unrelated to a vector's primary attribute of resizing. A 'stack' is a last-in, first-out (LIFO) data structure used for storing items where only the last item can be accessed, which contrasts with a vector's more flexible indexing capability. Thus, the correct answer highlights the vector's defining trait of dynamic resizing.

The correct answer highlights terabytes (TB) as a suitable unit for larger datasets, such as those typically encountered in substantial projects. While gigabytes (GB) are also a measure of data, terabytes are used to describe much larger volumes, making them more applicable in this scenario. Choosing megabytes (MB) would be insufficient due to the relatively small size they represent, while kilobytes (KB) are far too small for substantial data needs.

The correct answer is DVI (Digital Visual Interface) since it is designed to transmit high-definition video signals from a computer to a monitor but does not carry an audio signal. HDMI and DisplayPort, while also capable of transmitting high-definition video, additionally support audio transmission, which is not required in this scenario. VGA can carry an analog signal that is lower in quality compared to DVI, and it does not support audio either. Thunderbolt supports high-resolution displays and data transfers but is not typically used solely for video without audio like DVI.