Technician Test

Which of the following is the default subnet mask for IP address 192.168.1.1?

192.168.1.1

Which of the following uses a single 24-pin main motherboard power connector?

ATX 12V 2.0 (and higher) combined the 20-pin and 4-pin connectors used in ATX 12V 1.3 into one 24-pin connector. ATX is simply the name of the form factor; there are many types of ATX. There is no ATX 5V. Although ATX sends 12-volt and 5-volt signals, it is known as ATX 12v.

A wireless network is referred to as which of the following? a. SSID b. WPA c. DMZ d. DHCP

The service set identifier (SSID) is the name of the wireless network. This is the name you look for when locating a wireless network. WPA stands for Wi-Fi Protected Access, a secure connectivity protocol for wireless networks. The demilita rized zone (DMZ) is an area between the LAN and the Internet that often houses web, email, and FTP servers. The Dynamic Host Configuration Protocol (DHCP) is a service that assigns IP addresses automatically to computers and other devices.

Which of the following cable types have a copper medium? (3 answers) a. twisted pair b. coaxial c. fiber optic d. cat 7 e. multimode

Twisted pair, coaxial, and Category 7 cable are all examples of network cables with a copper medium. They all send electricity over copper wire. Multimode is a type of fiber optic cable; it uses light to send data over a glass or plastic medium. Twisted pair is the most common type of cabling used in today's networks.

Which of the following internet services are wireless? (3 answers) a. Cable Internet b. WiMAX c. Satellite d. DSL e. Cellular f. Fiber Optic

WiMAX, satellite, and cellular are examples of wireless Internet services. Cable Internet, DSL, and fiber optic all use wired connections.

Which type of printer uses a toner cartridge?

Laser printers use toner cartridges. Inkjet printers use ink cartridges. Dot matrix printers (also known as impact printers) use a ribbon. Thermal printers use specially coated paper that is heated.

Which of the following are important factors when purchasing a replacement laptop AC charger? (2 answers) a. current and voltage b. connecter size and shape c. battery type d. inverter type

Make sure to purchase an AC adapter that is a true replacement. This can be found on the laptop manufacturer's website. When you enter your model number, the website will tell you everything you need to know about current, voltage, and connector type. The battery and AC adapter do need to work in conjunction with each other; because of this, they both need to be compatible with the laptop. The AC adapter does several things, including reducing voltage and converting from AC to DC, but it does not invert the signal. However, there is an inverter in the laptop; it powers the display. This question is not referring to that, but if you are ever troubleshooting a display, the inverter type is very important.

What is the delay in the RAM's response to request from the memory controller called?

Memory latency or CAS (column address strobe) latency happens when a memory controller tries to access data from a memory module. It is a slight delay (usually measured in nanoseconds) while the memory module responds to the memory controller. The memory controller (also known as the northbridge) has a specific speed at which it operates. If the CPU asks the chip for too much information at once, this might increase latency time while the memory controller works.

Which of the following are ports you might find on smartphones and tablets?

Mobile devices such as smartphones and tablets commonly incorporate ports such as micro USB and Apple's Lightning connector. eSATA (used by external storage devices) and DVI (used by video cards) are commonly found on PCs.

A laptop cannot access the wireless network. What best describes the most likely causes for this? a. the function key for wireless was pressed by accident. b. the user installed a new web browser. c. the wireless network was forgotten in Windows d.the computer is obtaining an IP address automatically

Most laptops have a special function key (for example F12) which can enable or disable the Wi-Fi connection just by pressing it. Also, a wireless network can be "forgotten" in the operating system. If this happens, the laptop would have to be reconnected to the wireless network. After you are connected to a network, you can typically use whatever web browser you want, as long as the browser is compatible with the operating system in question. Client computers (such as laptops) normally obtain their IP addresses automatically from a DHCP server, so this is not a likely problem.

Which device connects to the network and has the sole purpose of providing data to clients? **

Network-attached storage (NAS) devices store data for network use. They connect directly to the network. Network address translation (NAT) is used on routers to take a group of computers on a private LAN and connect them to the Internet by using a single public IP. NAC stands for network access control, a group of technologies designed to allow or deny access by authenticating users

Which of the following has the fastest data throughout?

RAM is much faster than the rest of the options listed. For instance, if you have PC3-6400 DDR3 RAM (aka DDR3-800), your peak transfer rate is 6,400 MB/s. The rest of the following devices are listed in descending order: hard drive (for example 600 or 1969 MB/s), USB (For example 5 Gbps), and CD-ROM (typically 7.5 MB/s).

Which of the following components could cause the POST to beep several times and fail during boot?

RAM is one of the big four (RAM, CPU, motherboard, and video) that can cause the POST to fail. Different RAM errors can cause the POST to make a differ ent series of beeps. Consult your motherboard documentation for more information about the different beep codes. The sound card does not have an effect on the POST. If the power supply has a problem, either the computer will not boot at all (and not even enter POST) or will have intermittent problems— for example, shutting down unpredictably. Hard drive problems result in a variety of errors. Although the POST will complete in these cases, the operating system will not boot.

Special paper is needed to print on which type of printer?

Regular paper can be used on all the listed printers except for thermal printers, which use specially coated paper that is heated to create the image. A dot matrix might use tractor feed paper, but that is standard for many dot matrix printers; it is also still considered regular paper. A laser printer or dot matrix printer might use two-part paper, but two-part paper isn't necessary for laser printers or dot matrix printers to operate; thermal printers won't work unless you use specially coated paper. Inkjet printers normally use standard copy paper for printing.

What is the maximum data transfer rate of SATA revision 3.0?

SATA revision 3.0 can transfer a maximum of 6.0 Gb/s (6 gigabits per second, note the lowercase b). This allows a peak throughput of 600 MB/s (600 megabytes per second, note the uppercase B). 1.5 Gb/s is the data transfer rate of SATA revision 1.0. Its maximum throughput is 150 MB/s. 3.0 Gb/s is the data transfer rate of SATA revision 2.0. It has a peak throughput of 300 MB/s.

Which of the following could cause the POST to fail?

The CPU and memory need to be installed properly for the POST to run (and to pass). The hard drive and optical drive may or may not be installed properly, but they are not necessary for the POST to complete. If the power supply is defective, the system simply will not boot and will not even get to the POST stage.

Which key on a laptop aids in switching to an external monitor?**

The Fn (Function) key is used for a variety of things, including toggling between the built-in LCD screen and an external monitor/TV. The Fn key could be a different color (for example, blue) and offers a sort of "second" usage for keys on the laptop. Ctrl may also have secondary functions but is otherwise used the same as on a PC's keyboard. Alt and Shift work in the same manner as they do on a PC.

Which type of adapter card is normally plugged into a PCIe x16 adapter card slot?

The PCI Express (PCIe) x16 expansion slot is used primarily for video. Modems, network interface cards (NICs), and sound cards usually connect to a PCIe x1 slot or, in the uncommon occurrence, to a plain PCI slot.

Which process of the computer checks all your components during boot?

The POST (power-on self-test) is part of the Basic Input-Output System (BIOS) or Unified Extensible Firmware Interface (UEFI). It runs a self-check of the computer system during boot and stores many of the parameters of the components within the CMOS. EEPROM is a type of ROM chip on which the BIOS might reside. BIOS is known as firmware.

Which port is used by RDP? **

The Remote Desktop Protocol (RDP) uses port 3389. This protocol allows one computer to take control of another remote system. Port 80 is used by HTTP. Port 110 is used by POP3. Port 443 is used by HTTP Secure or HTTPS, a protocol used during secure web sessions.

What step enables you to take control of a network printer from a remote computer?

After you install the driver for the printer locally, you can then take control of it by going to the properties of the printer and accessing the Ports tab. Then click the Add Port button and select the Standard TCP/IP Port option. You will have to know the IP address of the printer or the computer that the printer is connected to.

Which kind of current does a typical desktop PC draw from a wall outlet?

Alternating current (AC) is the standard in the United States; your computer should be connected to a 120V AC outlet. Other countries might use 230V AC connections. Direct current (DC) works inside the computer. The power supply converts between the two! It is in charge of converting the alternating current (AC) drawn from the wall outlet into direct current (DC) to be used internally by the computer. Neutral current and draw current are not terms you will see on the CompTIA exams.

You would normally plug speakers into which type of port?

1/8" TRS jacks (also known as mini-jacks) are the most common for speaker connections. Speakers normally plug into a sound card or motherboard that have these ports; they are also sometimes referred to as 3.5 mm jacks. FireWire (IEEE 1394) ports are often used by audio equipment, but not for connecting speakers directly. DVI (Digital Visual Interface) is a type of video port. The larger 1/4" TRS connections are for instrument cables or full-size stereo connections.

You just configured the IP address 192.168.0.105 in Windows. When you press the Tab key, Windows automatically configures the default subnet mask of 255.255.255.0. Which of the following IP addresses is a suitable gateway address? a. 192.168.1.100 b. 192.168.1.1 c. 192.168.10.1 d. 192.168.0.1

192.168.0.1 is the only suitable gateway address. Remember that the gateway address must be on the same network as the computer. In this case, the network is 192.168.0, as defined by the 255.255.255.0 subnet mask. As to the other answers: 192.168.1.100 is on the 192.168.1.0 network; so is 192.168.1.1. 192.168.10.1 is on the 192.168.10.0 network. Don't forget that a zero at the end of an IP address denotes the network number.

A desktop computer does not have a lit link light on the back of the computer. What is a reason for this?

80. Answer: D. The most likely answer in this scenario is that the network cable is disconnected.

Which of the following is the maximum data transfer rate for wireless protocol 802.11n?

802.11n runs at a maximum of 600 Mbps. 802.11b runs at a maximum of 11 Mbps. USB 2.0 Hi-Speed runs at a maximum of 480 Mbps. 802.11g has a maximum data transfer rate (DTR) of 54 Mbps. 802.11ac is faster than 802.11 n, with typical maximum data transfer rates of 1.7 Gbps.

To prevent damage to a computer, the computer should be connected to which of the following?

A UPS (uninterruptible power supply) protects computer equipment against surges, spikes, sags, brownouts, and blackouts. Power strips, unlike surge protectors, do not protect against surges. Power inverters are effectively AC-to-DC converters; the power supply acts as a power inverter.

Which of the following is necessary for a CAD/CAM workstation?

A computer-aided design/computer-aided manufacturing worksta tion requires a powerful CPU, high-end video, and as much RAM as possible. The CPU is especially important to run design applications such as AutoCAD. HDMI output is necessary on HTPCs. Surround sound is needed on HTPCs and perhaps gaming computers as well.

Which of the following printer failures can be described as a condition in which the internal feed mechanism stopped working temporarily? a. no connectivity b. corrupt driver c. paper jam d. power cycle

A failure that occurs due to the internal feed mechanism stopping is known as a paper jam. For example, an HP LaserJet might show an error code 13.1 on the dis play, which means that there is a paper jam at the paper feed area. You would want to verify that the paper trays are loaded and adjusted properly. A No Connectivity message would mean that the printer is not currently connected to the network. A corrupt driver loaded on a workstation would cause any print job from that computer either to fail or to print nonsense. A Power Cycle message means that the self-diagnostic program has encountered a problem and is telling you to shut down the printer and turn it back on. This resets the printer, which can fix many of the issues that can occur.

Which of the following types of custom PCs requires an HDMI output?

A home theater PC (HTPC) requires a High-Definition Multimedia Interface (HDMI) output on the video card so that it can connect properly to the HDMI port on a television. Sure, it is possible to connect via DVI with an adapter, or even by way of VGA, but the whole point of a true HTPC is that it has the best to offer when it comes to connections. Because most theater system TVs have one or more HDMI inputs, the HTPC should have at least one HDMI output. Gaming PCs usually have DVI or DisplayPort connections to connect to desktop monitors, though they might have HDMI as well. Virtualization workstations don't rely on video cards as much as the

Which device connects multiple computers together in a LAN?

A switch connects computers together in a local area network (LAN). In SOHO networks, it is usually a part of a multifunction network device. In larger networks, the switch is an individual device that has 24,48, or 96 ports. A modem connects a PC to the Internet by way of a dial-up connection over a plain old telephone service (POTS) line. A router connects one network to another. Though a SOHO multi function device is often referred to as a router, it is not the router portion of that device that connects the computers together in the LAN. A firewall protects all the computers on the LAN from intrusion.

Which of the following might you find as part of a tablet computer?

A tablet computer will almost always contain flash memory (16 GB, 32 GB, or similar), and a multi-touch touchscreen. However, SATA hard drives and 24-inch displays are more likely to be found on PCs, not tablet computers.

Which of the following terms best describes two or more LANs connected together over a large geographic distance? a.PAN b. WAN c. WLAN d. MAN

A wide area network (WAN) is a network in which two or more LANs are connected together over a large geographic distance— for example, between two cities. The WAN requires connections to be provided by a telecommunications or data communications company. A personal area network (PAN) is a small network made up of short-distance devices such as Bluetooth. WLAN stands for wireless local area network. This is the name that the IEEE uses for their 802.11 standards. That is because the term Wi-Fi, though widely used, is copyrighted. A MAN is a metropolitan (or municipal) area network; it can connect two or more LANs together but does it in a small city-based area.

A color laser printer produces images that are tinted blue. What step should be performed to address this problem?

After installing a printer, it is important to calibrate it for color and orientation, especially if you are installing a color laser printer or an inkjet printer. These calibration tools are usually built in to the printer's software and can be accessed from Windows, or you can access them from the printer's display. If a toner cartridge needs to be cleaned, it probably has a leak and should be replaced. The fusing assembly needs to be changed only when it fails. Many printers will give you an indication of when the fuser is at 20 percent life and needs to be replaced soon. If the fuser fails, the toner will fail to stick to the paper. The primary corona wire can be cleaned; it is near the drum. This can help with other types of print quality problems, such as lines and smearing

Which is the most commonly used battery type in laptops?

Although Ni-Cd and NiMH batteries have been used on laptops, the most commonly used type of battery as of the writing of this book is lithium-ion. Some laptops, and especially other small mobile devices, use lithium-ion polymer-based batteries. Fuel cells are used in vehicles, vending machines, and highway road signs, but not laptops.

What type of power connector is used for a x16 video card?

An x16 card is a PCI Express card. It can have one or two PCIe 6-pin power connectors (or 8-pin). Molex 4-pin power connectors are used by secondary devices: fans, monitoring devices, and older IDE hard drives. SATA 15-pin power connections are used by SATA-compliant hard drives and optical drives. P1 24-pin power is the main power connection that the motherboard gets from the power supply.

What is the minimum number of hard drives necessary to implement RAID 5?

Because RAID 5 uses striping with parity, a third disk is needed. You can have more than three disks as well. Two disks are enough for plain RAID 0 striping and is the exact number you need for RAID 1 mirroring. Four disks are required by RAID 6 and RAID 10.

Which of the following are components you might find inside a PC?

CPU, Mother Board, and RAM-Common components inside a PC include the CPU, motherboard, and RAM, along with the power supply, adapter cards, and hard drives. Keyboards (and mice) are input devices that are located outside the PC. Printers (and displays) are output devices that are located outside the PC. A cable modem is an Internet communication device that is outside of the PC.

A customer wants to access the internet from many different locations in the united states. Which of the following is the best technology to enable her to do so? a. Infrared b. Cellular WAN c. Bluetooth d. 802.11n

Cellular WAN uses a phone or other mobile device to send data over standard cellular connections. By themselves, the other options don't offer a direct connection to the Internet. Infrared is used more often for very short distance connec tions, allowing data to be ''beamed" from one device to another. Bluetooth is also for short distances, but not as short as infrared. Bluetooth headsets are commonly used with smartphones. 802.11n is a Wi-Fi technology for the LAN.

Which of the following bed describes "full duplex"? a. transmitting and receiving data b. transmitting and receiving data simultaneously c. transmitting data only d. receiving data only

Full duplex means that a network adapter (also known as a network interface card or NIC) can transmit and receive data at the same time. A 1000 Mbps network running in full-duplex mode can transfer 2000 Mbps, but this is because transmitting and receiving have been combined, not because speed has been increased. A network adapter that can both transmit or receive data but not at the same time is transmitting in half-duplex mode.

Which device stores data over the long term?

Hard Drive- The hard drive stores data over the long term. The hard drive stores the OS and data in a nonvolatile fashion, meaning the data won't be erased when the computer is turned off. The CPU calculates data and sends it to RAM for temporary storage; the RAM (which is volatile) is cleared when the computer is turned off. The video card stores temporary video data within its onboard memory, but this, like RAM, is volatile and is cleared when the computer is turned off.

Which environmental issue affects a thermal printer the most?

Heat is the number-one enemy to a thermal printer. If a thermal printer or the thermal paper is kept in a location where the temperature is too high, it could cause failure of the printer and damage to the paper. Excessive moisture can cause rubber rollers and separation pads to fail over time. Electrostatic discharge (ESD) is always a foe, but only if you are working inside the printer. Dirt can clog up the works over time in any device. But by far, heat is what you have to watch for with thermal printers.

How should you hold RAM when installing it?

Hold RAM by the edges to avoid contact with the pins, chips, and circuitry. Touching the front and back is not advised because it will require touching the chips on the RAM module. Tools are not needed, and if they are used, metallic ones could be damaging to the module. Plastic tweezers are used to remove screws that fall into tough-to-reach places in the case. A punchdown tool is used to terminate networking cables to patch panels or to punch blocks.

Which kind of form factor is is commonly found in HTPCs?

Home theater PCs (HTPCs) commonly use the microATX form factor. The Mini-ITX form factor is also used for HTPCs. Less commonly used is the ATX form factor due to its large size. Pico-ITX and Nano-ITX are used in handheld computers and are much smaller.

After you replace a motherboard in a PC, the system overheats and fails to boot. Which is the most likely cause?

If a motherboard were just replaced and the system overheats when booted, then there's a good chance that thermal paste was not applied to the CPU. When you install a new motherboard, the CPU must be removed from the old board and installed to the new one, or a new CPU needs to be installed. Either way, the heat sink must come off. Whenever a heat sink is connected (or reconnected) to a CPU, thermal compound (also known as thermal paste) should be applied; otherwise over heating can easily occur. The GPU is the video card's processor; it is not quite possible for this to be incompatible with the CPU. It is possible for the video card to be incom patible with the expansion bus slots on the new motherboard, though. Even if the new motherboard's firmware has not been updated, the system should not overheat. If the case fan fails, the computer should not overheat. The CPU will still have its own fan, and the power supply will still be exhausting hot air.

A user's time and date keeps resetting to January 1, 2000. Which of the following is the most likely cause?

If the time and date keep resetting to a date such as January 1, 2000, chances are that the lithium battery needs to be replaced. Updating the BIOS/UEFI allows the PC to "see" new devices and communicate with them better, but it will not fix the time issue. Updating Windows will not fix this problem, but it should be done often to keep the computer secure. Other date and time synchronization problems can be fixed in the clock settings within the Notification Area. Windows client computers should be configured to synchronize to a time server.

What occurs last in the printing process?

In the laser printing process, the cleaning stage happens last. The laser printing process includes the following steps in order: Processing, charging, exposing, developing, transferring, fusing, and cleaning.

Which kind of socket incorporates "lands" to ensure connectivity to a CPU?

LGA (land grid array) is the type of socket that uses "lands" to connect the socket to the CPU. PGA (pin grid array) sockets have pinholes that make for connectiv ity to the CPU's copper pins. The chipset is either a single chip, or the combination of the northbridge and southbridge on the motherboard. LGA sockets are often a brass alloy or have gold contacts; although copper might be a possibility for some sockets, such sockets don't fit the description of "lands" in the question. LGA is the best answer.

You use your laptop often. What is a simple, free way to keep you laptop running cool?

Laptops have airflow underneath them; if the unit is not on a flat surface, that airflow will be reduced or stopped altogether, leading to component damage. The freezer is not a good idea because condensation could build up inside the unit. A fan won't do much good unless the laptop is on a flat surface, and although it is plausible to keep the laptop turned off, it negates the reason for using the laptop.

What should NOT be connected to a UPS?

Laser printers use large amounts of electricity, which in turn could quickly drain the battery of the UPS. They should be plugged into their own individual power strips.

Which of the following technologies allows two mobile devices to transfer data simply by touching them together?

Near field communication (NFC) allows two mobile devices such as smartphones to transfer data simply by touching them together (or bringing them in very close proximity of each other). A USB port (for example, micro USB) allows for the transfer and synchronization of data, but to and from a mobile device and a PC or laptop. Bluetooth and Wi-Fi enable wireless connectivity but do not require that the devices touch or be in close proximity.

To which expansion slot would you install a x16 card?

PCI Express (PCIe) slots accept x1, x4, and x16 (pronounced "by sixteen") cards. PCIe is by far the most common expansion slot for video cards (which are usually x16). PCI is an older expansion bus that can accept video cards but, unlike PCIe, they have no particular designation. USB stands for universal serial bus; it is a standard for connecting external equipment to a computer, not an expansion bus. PCI-X is a derivative of PCI, used mostly in servers, for example, with network adapters.

Which expansion bus uses lanes to transfer data?

PCIe (PCI Express) uses serial lanes to send and receive data. That means one bit at a time per lane. PCI is a parallel technology; parallel means eight bits at a time or multiples of eight. DMI (Direct Media Interface) is a serial technology that does use lanes, but it is not an expansion bus; rather, it connects the chipset to the CPU. SATA is the standard for connecting hard drives and optical drives and transmitting data to and from those devices.

When running cable through drop ceilings, which type of cable do you need?

Plenum-rated cable needs to be installed wherever a sprinkler system is not able to spray water. This includes ceilings, walls, and plenums (airways). The reason for this is that the PVCs in regular cable give off toxic fumes in the case of a fire. Plenum- rated cable has a protective covering which burns slower and gives off less toxic fumes.

Terri finishes installing a printer for a customer. What should she do next?

Print a test page after installation. If the test page prints properly, it should be unnecessary to print a page in Word. Restarting the spooler is not needed if the printer has just been installed. The spooler should already be running. If the spooler has failed, that would be a separate troubleshooting scenario. Separator pages are not necessary; they are optional and can be configured in the Printer Properties window.

Which of the following is not a video port?

S/PDIF is not a video port. It stands for Sony/Philips digital interface format; a digital audio interconnect that can be used with fiber optic TOSLINK connectors or coaxial RCA connectors. DVI is the Digital Visual Interface, one of the most common outputs on PC video cards. HDMI is the High-Definition Multimedia Interface, another common video standard, especially in laptops, home theaters, and HTPCs. DisplayPort is another video standard used by some PCs that has the ability to display high resolutions.

Which of the following cable types can protect form electromagnetic interference (EMI)? (2 answers) a. UTP b. STP c. Fiber optic d. Cat 6

Shielded twisted pair (STP) and fiber optic can protect from EMI. However, unshielded twisted pair (UTP) cannot. Unless otherwise mentioned, Category 6 cable is UTP. STP is shielded twisted pair. Unlike UTP (unshielded twisted pair), STP provides an aluminum shield that protects from EMI. UTP and coaxial have no such protection. Fiber optic uses a different medium altogether, transmitting light rather than electricity; therefore, EMI cannot affect fiber optic cables.

A customer can barely hear sound from the speakers on her laptop. What should you do first?

Sometimes, the volume wheel on older laptops can be hard to find and may be set in the lowest position (which might still make a slight audible noise). On newer laptops, the volume is usually controlled by pressing the Fn key and the Volume Up or Volume Down key simultaneously. Installing a new sound driver isn't necessary yet. Always check the physical volume first, and then check if the volume is low or the sound is muted in Windows. Tapping the speakers is an interesting idea, but it has no place in this discussion. If a speaker is loose, it often makes scratchy noises;

Which of the following are output devices?

Speakers, printers, and displays are output devices. A speaker outputs sound. A printer outputs paper with text and graphics. A display (or monitor) displays video. Keyboards, mice, and touchpads are input devices. Another input device used by mobile devices is the stylus. A stylus is used on mobile devices that incorporate touchscreens. It is a pen-like device used to manipulate the display, similar to a mouse. However, most mobile devices now allow a person to simply use a finger and tap on the screen.

Which of the following is a common type of CPU for a smartphone?

System on a chip (SoC) is a type of CPU used in smartphones and tablet computers. 64-bit versions of these are common in mobile devices; they incorporate a variety of functionality within the CPU. LGA 2011 is a type of CPU socket used in PCs. It is designed for Intel Core i7 and other Intel CPUs. LPDDR is a common type of RAM used in mobile devices.

Which of the following is the proper boot sequence of a PC?

The CPU must be installed correctly for the POST to begin. After the POST is successful, the boot loader (for example, BOOTMGR in Windows) then runs,and then the operating system comes up (that is, if there are no boot loader errors). The CPU is crucial; if installed incorrectly, the system will not POST, making it more difficult to troubleshoot.

Which of the following translates a computer name into an IP address? a. TCP b. UDP c. DNS d. FTP

The DNS (Domain Name System) protocol translates a computer name into an IP address.

Which protocol uses port 53? **

The Domain Name System (DNS) protocol uses port 53 by default. FTP uses port 21. SMTP uses port 25. HTTP uses port 80.

Which port number is used by HTTP? a. 21 b. 25 c. 80 d. 110

The Hypertext Transfer Protocol (HTTP) uses port 80 (by default). Port 21 is used by the File Transfer Protocol (FTP). Port 25 is used by the Simple Mail Transfer Protocol (SMTP). Port 110 is used by the POP3 email protocol.

Which of the following connector types is used by fiber optic cabling? a. LC b. RJ45 c. RG-6 d. RJ11

The LC connector is used by fiber optic cabling. Other fiber connectors include SC and ST. RJ45 is the connector used by twisted-pair networks. RG-6 is the cable used by cable Internet and TV; an F-connector is attached to the ends of an RG-6 cable. RJ11 is the standard phone line connector.

How many pins are inside a SATA data connector?

The SATA data connector has seven pins. The SATA power connector has 15 pins. ATX 12V 2.0 and higher power connections have 24 pins. Among other things, 127 is the maximum amount of USB devices you can connect to the computer.

Eric uses an external monitor with his laptop. He tells you that his laptop will boot, but the system won't display anything on the external screen. What enables the display?

The Screen key (also known as the display toggle) is one of the keys available when you use the Function (Fn) key. This enables you to switch between the laptop display and an external display (or if you wanted to use both). If the display toggle doesn't work, then try another external monitor. No other key combinations perform this task.

Which type of adapter card accepts broadcast programming?

The TV tuner card accepts television broadcast programming. It will usually have cable-in and antenna-in F-connector ports. FireWire cards allow a computer to connect to FireWire devices such as hard drives and audio devices. Video capture cards are used to record video from a camera, VCR, or close-circuit television system. A network interface card is also known as a NIC or network adapter; it makes the connection to the Ethernet network for a PC.

Which device should you use to protect against power outages?

The UPS (uninterruptible power supply) is the only item listed that protects the computer from power outages like blackouts and brownouts. A multimeter is used to test AC outlets and individual wires inside the computer. FedEx is a shipping company, not a computer acronym. A surge protector (or surge suppressor) is used to protect computer equipment from surges and spikes in power, but cannot protect against power outages.

What does the "b" in 1000 Mbps stand for?

The b in 1000 Mbps stands for bits. 1000 Mbps is 1000 megabits per second or 1 gigabit per second. Remember that the lowercase b is used to indicate bits when measuring network data transfer rates, USB data transfer rates, and other similar serial data transfers. Bytes and megabytes refer to parallel data transfers or the calculation and storage of data where 8 bits equals a standard byte of information. Network data transfer rates are also known as speed or bandwidth.

Which type of printer uses impact to transfer ink from a ribbon to the paper?

The dot matrix is a type of impact printer. It uses a printhead to physically impact the ribbon and transfer ink to the paper. Laser printers apply toner to paper through varying voltages. Inkjet printers spray ink from a cartridge onto the paper. Thermal paper is specially coated and forms text when it is heated properly.

Which of the following display types is most likely to be found on a laptop?

The liquid crystal display (LCD) is the most common type on a laptop. You might also see LED-backlit LCDs. Cathode ray tubes (CRTs) were the predecessor to flat-panel monitors. They were rarely used in laptops and only way back in the 1980s. CRT monitors were more commonly used with PCs. Organic LED screens are not popular on laptops as of the writing of this book. VGA is not a type of display; it is a video standard that uses a 15-pin connector. It is the predecessor to today's standards such as DVI and HDMI.

Which of the following is the minimum category cable needed for a 1000BASE-T network?

The minimum cable needed for 1000BASE-T networks is Category 5e. Of course, Cat 6 would also work, but it is not the minimum of the listed answers. 1000BASE-T specifies the speed of the network (1000 Mbps), the type (baseband, single shared channel), and the cable to be used (T = twisted pair). Cat 3 is suitable for 10 Mbps networks. Cat 5 is suitable for 100 Mbps networks. Another type of cable, Category 7, is a newer and even faster version of twisted pair. This is used in 1 Gbps and 10 Gbps networks.

Which of the following CPU cooling methods is the most common?

The most common CPU cooling method is the heat sink and fan combination. The heat sink helps the heat to disperse away from the CPU, whereas the fan blows the heat down and through the fins; the power supply exhaust fan and possibly additional case fans help the heat escape the case. Heat sink and fan combinations are known as active cooling. The heat sink by itself is called passive cooling; it requires no power but is not enough to cool most desktop PCs. Liquid cooling is a more extreme method used in custom PCs such as gaming computers and possibly audio/ video workstations and virtualization machines. It uses a coolant similar to the way an automobile does. Liquid nitrogen would be plain foolish and is not a legitimate answer.

Which of the following IP addresses can be routed across the internet? a. 127.0.0.1 b. 192.168.1.1 c. 129.52.50.13 d. 10.52.50.13

The only listed answer that is a public address (needed to get onto the Internet) is 129.52.50.13. All the others are private IPs, meant to be behind a firewall. 127.0.0.1 is the local loopback IP address. 192.168.1.1 is a common Class C private IP address used by SOHO networking devices. 10.52.50.13 is a Class A private address.

You are configuring Bob's computer to access the internet. Which of the following is required? (All the apply) a.DNS server address b. Gateway address c. Email server name d. DHCP server address e. Domain name

To get on the Internet, the DNS server address is required so that the computer can get the resolved IP addresses from the domain names that are typed in. The gateway address is necessary to get outside the network. Email server infor mation is not necessary if the person is just looking to get onto the Internet. A DHCP server address is not necessary either; however, it is an easier method. The beauty of DHCP is that you don't need to know the DHCP server's address to acquire an IP address. The domain name for your network is normally not needed, either; it is only necessary if you want to add the computer to the organization's domain.

You are making your own networking patch cable. You need to attach an RJ45 plug to the end of a twisted- pair cable. Which tool should you use? **

Use an RJ45 crimper tool to permanently attach RJ45 plugs to the end of a cable. A tone and probe kit is used to locate individual phone lines, but it can also be used with network lines. The better tool, however, for testing and locating is a continuity cable tester. A multimeter is great for testing AC outlets and for testing wires inside a computer, but it is not often used in networking applications.

What describes best printing in Duplex?

When printing "duplex," it means that you are printing on both sides of the paper (if the printer has that capability). Some laser printers can do this, but it creates a longer total paper path, which leads to more frequent paper jams. Collation is when documents are printed in a standard order, usually numerically. Full-duplex in networking is when information can be sent and received simultaneously. A printer can have a full-duplex connection to the network, but this question is referring to printing in duplex. Printing to file is a process that can be performed by Windows. Instead of selecting a physical printer when printing a document, Windows prints to a special file and saves that file to a location of your choice with a .prn extension.

Time installs a new CPU in a computer. After a few hours, the processor starts to overheat. Which of the following might be the cause?

Without the thermal compound applied, the processor might overheat after a few hours. If the CPU is not locked down, or is not properly seated, the PC will simply fail to boot. If the CPU is not compatible with the motherboard, either it will not fit the socket or the PC will not boot.

A customer complains that he gets a headache when he views his display for more than an hour. What should you do?

You should install an antiglare filter on the monitor. By reducing glare, a person's eyes react better to the display so the customer can use the computer longer without getting a headache. Raising the resolution would make the problem worse. Lowering the resolution might help, but it is only a temporary solution, and not a good one at that. Dimming the lights decreases glare, but studies prove that a person will develop eye strain and headaches quicker when reading a backlit screen in a dark room. Video Graphics Array (VGA) is not an upgrade from DVI— quite the reverse. Besides, changing the video connector probably won't help the problem. The only ways to fix the problem are to: install an antiglare filter; upgrade the monitor to a bigger size and consider positioning it differently, for example, farther away; and recommending that the user take breaks every 30 minutes or so.