CompTIA A+ Practice Test (220-1201)

Wireless Wide Area Network (WWAN) is a wireless network type that uses the same technology used by cellular networks like LTE, 5G, etc. It is used for larger networks like one spanning a city or large campus.

The presence of long, repeated beep codes during startup is indicative of a hardware issue related to the motherboard POST process. Of the given answers, the POST beeps are likely from RAM that is not properly seated. It could also be another hardware component like the CPU or a video card having issues. POST codes indicate unrecoverable hardware issues within internal components of a computer during boot up.

While it's true that M.2 appears on motherboards, the statement is false because M.2 is not just a motherboard form factor; it is a specification for internally mounted computer expansion cards and associated connectors, which allows the connection of M.2 supported devices, often SSDs, directly to a motherboard. The M.2 connector can support SATA and PCIe interfaces depending on the motherboard and the type of M.2 device.

WPA3 is the latest security protocol for wireless networks and offers improvements in encryption and user authentication over its predecessors. WPA2, while still secure, is not as robust as WPA3. WEP is outdated and has many known security vulnerabilities, making it unsuitable for a business environment. WPA is better than WEP but still less secure than WPA2 and WPA3.

The ARM architecture is known for its power efficiency, which makes it the preferred choice for devices such as smartphones and tablets that require long battery life. Unlike traditional x86 architecture, which is more common in desktop and laptop computers, ARM architecture is designed to perform a smaller number of types of computer instructions so that it can operate at a higher speed, consuming less power and providing higher efficiency for the day-to-day tasks most commonly performed on mobile devices.

The correct accessory would be a tablet-specific adapter designed to convert the tablet’s video output to match the older input format of the projector. Since the projector uses an older standard, it’s likely to require an analog signal, such as what a VGA connector would provide. The other options are incorrect because they either assume the wrong type of output from the tablet or input on the projector, which may not be compatible with the tablet’s connector or the projector’s analog input requirements.

PCI Express (PCIe) is currently the most common and high-performance expansion slot used for video cards in modern desktop computers. PCIe offers high-speed data transfer rates and has largely replaced older standards such as PCI and AGP. ISA is an outdated standard and not used in modern systems, while CNR was a short-lived slot type intended for networking and audio cards rather than video applications.

Checking the power cable is the most logical answer. You do not know if the power supply is good yet, so replacing it would be premature. These symptoms are not indicative of a CMOS battery issue or a boot sequence issue (also, you can't access the BIOS/UEFI if there is no power).

Noticing a faint smell similar to burning electronics when a projector fails to produce visible output is a strong indicator that the projector bulb has likely burned out. Checking the bulb for signs of damage, discoloration, or the smell of burned materials would be the first step in confirming the cause before considering replacement.

The term Digitizer refers to the touch screen digitizer used by modern mobile phones, tablets and laptops. The Digitizer converts input (a user touching their fingertip to the screen) into digital data that can be used by the operating system.

A multicore processor would provide the advertised improvement by offering multiple processing units, called cores, within a single processor package. This allows the computer to perform various tasks simultaneously, thereby improving handling capabilities for multi-threaded applications. Single-core and multithreading options do not provide multiple physical cores and thus are less efficient in parallel task handling. Increasing RAM may improve overall system performance but doesn't directly improve the machine's parallel processing capability like adding more cores would.

Replacing the current 5400rpm HDD with an SSD will significantly improve the system's boot time and application responsiveness because SSDs have faster read/write speeds than HDDs, in addition to having no moving parts which reduces the risk of mechanical failure and improves durability. While increasing RAM could also improve performance, it would not have as significant an impact on boot times and data loading speeds as replacing the HDD with an SSD. A new battery or a wireless card would not have an effect on system boot times or application performance.

LDAP commonly uses port 389 for its directory services without encryption. LDAP over SSL, which is encrypted, typically uses port 636. Port 53 is used by DNS, and port 443 is the standard for HTTPS traffic.

The DHCP (Dynamic Host Configuration Protocol) configuration within a router is responsible for automatically assigning IP addresses to client devices on a network. By configuring the DHCP settings such as scope, leases, and reservations, an IT specialist can control the IP addresses assigned to devices in a small office or home network. Incorrect answers usually involve elements outside of DHCP's scope, such as DNS configuration, which sets up how domain names are resolved to IP addresses, and VLAN, which separates broadcast domains within a switch.

Ethernet over Power also called Power-line Communication allows Ethernet signals to be sent over standard electrical power wiring in a building. This is helpful for situations where both WiFi and running new Ethernet cabling is not supported. Usually this is done by using adapters that plug into a wall power outlet and have a RJ-45 socket. It is often confused with Power over Ethernet, which is using Ethernet signals to power a networking device.