CompTIA Practice Test #2

The audio connector on the front or top panel will use a round, 3.5 mm connector. You can plug speakers into it. Alternatively, you could plug a headset with a boom microphone into it for additional privacy.

The Remote Desktop Protocol (RDP) allows users to connect to remote computers and run programs on them. It uses port 3389.

Any device that measures one or more physical or behavioral features of an organism is considered a biometric device. Biometric devices include fingerprint scanners, retinal and iris scanners, voice recognition devices, facial recognition devices, and others.

The authentication server facilitates the challenge/response service for validating someone's credentials.

Thermal printers use a heating element. It heats up spots on special waxy, heat-sensitive paper to form the image.

When a laser printer requests maintenance, it's because it has reached a certain page count. Apply a proper maintenance kit (one recommended by the manufacturer) and then clear the service message.

Fiber-optic cabling uses pulses of light instead of electric voltages to transmit data, so it is immune to electrical interference and to wiretapping.

Laser printers incorporate a fuser assembly, which uses two rollers that apply pressure and heat to fuse the plastic toner particles to the paper.

The two host-to-host protocols are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). TCP guarantees packet delivery through the use of a virtual circuit and data acknowledgments, and UDP does not. Because of this, TCP is often referred to as connection oriented, whereas UDP is connectionless.

The system BIOS/UEFI settings include password protection to not allow system bootup unless someone enters a password. This would prohibit the OS from loading upon boot.

If a user types www.sybex.com in a web browser, the domain name system (DNS) server will resolve the domain name to an IP address. Similarly, DNS servers will resolve a fully qualified domain named (FQDN) network directory resource on the network to make locating that resource possible.

A virtual private network (VPN) can encrypt your network traffic, keeping your data confidential along the wire.

The connectors are a four-pin RJ-11, typically used for telephone installations, and an eight-pin RJ-45 connector, used on UTP and STP for network transmissions.

The cable can be any of the three major types, coaxial, twisted pair, or fiber, but it needs to be plenum rated. Normal cables have a PVC coating, which produces a poisonous gas when burned. Plenum-rated cables have a Teflon coating, which is not toxic when burned.

USB 1.0 supports 12 Mbps. In following standards, USB 2.0 supports 480 Mbps, USB 3.0 supports 5 Gbps and USB 3.1 Gen 2 supports 10 Gbps.

Daisy-wheel and dot-matrix printers use print heads that strike an ink ribbon, which presses up against the paper to make an image. Therefore, they are impact printers. Laser printers use a drum to create the image, and thermal printers use heat.

A hybrid hard drive is a combination of a conventional magnetic hard disk drive and solid-state storage. The goal is to increase access speed for commonly accessed data while still providing larger capacity similar to a conventional HDD.

Of the wireless encryption methods listed, WPA2 is the newest and most secure. Some routers offer WPA2 Enterprise, which is a great choice as well.

Transmission Control Protocol (TCP) guarantees packet delivery through the use of a virtual circuit and data acknowledgments, and User Datagram Protocol (UDP) does not. Because of this, TCP is often referred to as connection oriented, whereas UDP is connectionless.

Universal Plug and Play (UPnP) is a standard designed to simplify the process of connecting devices to a network and to enable those devices to automatically announce their presence to other devices on the network.

One of the most popular broadband choices for home use is Digital Subscriber Line (DSL). It utilizes existing phone lines and provides fairly reliable high-speed access. Most DSL subscriptions are asymmetrical, meaning they offer faster download speeds than upload speeds.

DB9 was the “D” format, 9-pin connector type that was the standard format for keyboards, mice, and other small peripherals.

USB 3.0 has a cable length limitation of 3 meters. USB 2.0 cables can be up to 5 meters in length.

To communicate with other computers on a network, you need a network interface card (NIC). A wireless access point (WAP) is a wireless hub that many wireless devices communicate with, and WPA is a wireless security standard. A KVM switch allows you to have multiple systems attached to the same keyboard, video, and mouse. Other types of expansion cards (that could use the same slot as a NIC) include video cards, sound cards, storage cards, TV tuner cards, and riser cards.

The web server hosts and serves information available to the public (or internally as an intranet web server). Originally, files on the web server would be primarily HTML files, but today's web servers would also serve style sheets, scripts, and various media files.

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That capacity of module might not have been in existence when the motherboard's chipset was released. Sometimes flashing the BIOS is all that is required.

In the exposing step, the image is written to the photosensitive imaging drum. Wherever the laser beam touches, the photosensitive drum's charge is severely reduced from –600 VDC to a slight negative charge (around –100 VDC). As the drum rotates, a pattern of exposed areas is formed, representing the image to be printed.

The File Transfer Protocol (FTP) server hosts files for easy access, allowing users who are able to browse it to transfer and upload the files.

Ethernet over power can make Ethernet connections by using electrical outlets. For it to work, both devices must be on the same electrical circuit.

Routers operate at the Network layer (Layer 3) of the OSI model. Because of this, they make their decisions on what to do with traffic based on logical addresses, such as an IP address.

Service Location Protocol (SLP) enables a computer to discover local systems and other devices, if it is not already preconfigured with their location.

An intrusion detection system (IDS) will monitor and alert you on suspect behavior. The IDS can be a network-based device or host-based, meaning it runs as a process in the background.

The order of steps is processing, charging, exposing, developing, transferring, fusing, and cleaning.

A mini-ITX motherboard is a 6.7″ square. Nano-ITX motherboards are 4.7″ square, pico-ITX motherboards are 3.9″ × 2.8″, and mobile-ITX motherboards are 2.4″ square.

A loopback plug is for testing the ability of a network adapter to send and receive. The plug gets plugged into the NIC, and then a loopback test is performed using troubleshooting software. You can then tell whether the card is working properly.

The Domain Name System (DNS) is responsible for resolving hostnames to IP addresses. This is used millions of times daily on the Internet; when someone types in a website name, such as www.sybex.com, DNS will resolve that to an IP address to enable communication.

To encrypt traffic between a web server and client securely, Hypertext Transfer Protocol Secure (HTTPS) can be used. HTTPS connections are secured using either Secure Sockets Layer (SSL) or Transport Layer Security (TLS). HTTPS uses port 443.

Hyperthreading-capable processors appear to the operating system to be two processors. As a result, the operating system can schedule two processes at the same time on each physical core.

A processor that exhibits a multicore architecture has multiple completely separate processor dies in the same package. The operating system and applications see multiple processors in the same way that they see multiple processors in separate sockets.

Most network cables are coated with a plastic PVC coating, which produces toxic gas when burned. Plenum-rated cables are coated with a Teflon-like material that is not poisonous when burned.

Cable television installations typically use either RG-6 or RG-59 cable. RG-6 is slightly thicker, can run longer distances, and supports digital signals. RG-59 is suited only for analog TV signals.

The private IP address ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. The address 172.168.38.155 is outside the private IP address range and is a public address.

The printer driver uses a page-description language (PDL) to convert the data being printed into the format that the printer can understand. The driver also ensures that the printer is ready to print.

If memory supports ECC, check bits are generated and stored with the data. If one of the eight memory bits is in error, ECC can correct the error.

The connector pictured is a BNC connector. They are identifiable by their groove-and-notch fastening mechanism that locks by twisting one-quarter turn. F-connectors are easily identifiable because they are threaded. SC and ST connectors are for fiber-optic cable.

There is no need for laptops with LED displays to convert the DC power coming into the laptop to the AC needed to power traditional fluorescent backlights because LEDs operate on DC power just like the rest of the laptop. Therefore, systems with LED backlights have no inverter board.

The end-user devices are configured to at least request a DHCP-assigned IP address or be preconfigured with a static IP, gateway and DNS information.

An Ethernet splitter will take the incoming signal on two pairs and then split it, so on the output end it produces two sets of signals using two pairs each. Because of this, Ethernet splitters are limited to 100 Mbps connections. It is not recommended that you use Ethernet splitters on a network. If you need to connect multiple computers using UTP, use a hub or a switch.

For an audio/video editing workstation, you should maximize the audio and video capabilities, including having at least two large monitors. Videos also take a lot of disk space, so significant storage space is required.

During the cleaning step, a rubber blade inside the toner cartridge scrapes any toner left on the drum into a used toner receptacle, and a fluorescent lamp discharges any remaining charge on the imaging drum. (Remember that the drum, being photosensitive, loses its charge when exposed to light.).