Trans CompTIA 220-901PRACTICE EXAM 3
Which connectors are used with fiber-optic cabling? (Choose two.) A. SC B. ST C. AUI D. RJ-11 E. RJ-45
A. SC B. ST Explanation: The ST and SC connectors are the two most popular connectors available for fiber-optic cabling. Other common fiber-optic connectors are FC, FDDI, LC, D4, MU, MT, and MT-RJ.
Which IP address is used by a Class A private network? A. 10.0.0.0 B. 172.16.0.0 C. 192.168.0.0 D. 127.0.0.1
Answer: 10.0.0.0 ________________________________________ Explanation: The 10.0.0.0 address is a Class A IP address for private networks. Private network IP addresses cannot be used on the Internet. The 172.16.0.0 address is a Class B IP address for private networks. The 192.168.0.0 address is a Class C IP address for private networks. The 127.0.0.1 address is not reserved for private networks. This IP address is the software loopback address.
What is the maximum segment distance for data transmission using 10BaseT, 100BaseT, and 1000BaseT? A. 25 meters (82 feet) B. 50 meters (164 feet) C. 100 meters (328 feet) D. 185 meters (607 feet) E. 500 meters (1,640 feet)
Answer: 100 meters (328 feet) ________________________________________ Explanation: 10BaseT, 100BaseT, and 1000BaseT Ethernet use unshielded twisted-pair cable (UTP) as their transmission medium. The maximum transmission distance of UTP cable is 100 meters, or 328 feet. This distance can be increased using repeaters.
Which is the following is a valid Automatic Private IP Addressing (APIPA) address? A. 10.1.1.131 B. 169.254.2.120 C. 172.16.4.36 D. 192.168.16.45
Answer: 169.254.2.120 Explanation: The 169.254.2.120 address is a valid APIPA address. By default, Windows XP and Windows 7 client computers are configured to use an APIPA address if the DHCP server does down. The addresses in the APIPA range are 169.254.0.0 through 169.254.255.255. These addresses are not routable and are therefore only usable on the local subnet.
A customer has a Windows 7 computer with a high-definition DVD (HD DVD) drive. He is asking about DVD compatibility. Which type of disk will he be UNABLE to use in his computer? A. CD-ROM disks B. DVD disks C. HD DVD disks D. Blu-Ray disksBottom of Form
Answer: Blu-Ray disks Explanation: High-definition DVD (HD DVD) drives can play CD-ROM disks, DVD disks, and HD DVD disks. All HD DVD drives are backwards compatible with CD-ROM and DVD disks. HD DVD drives cannot play Blu-Ray disks. Only Blu-Ray drives can play Blu-Ray disks. Blu-Ray drives can play CD-ROM and DVD disks. DVD drives can play CD-ROM and DVD disks. CD-ROM drives can ONLY play CD-ROM disks.
The primary hard drive in your Windows computer has failed. You purchase a new hard drive and install it in your computer. What should you do first? A. Partition the hard drive. B. Format the hard drive. C. Change the hard drive configuration settings in the computer's BIOS. D. Change the hard drive configuration settings in the Disk Management utility
Answer: Change the hard drive configuration settings in the computer's BIOS. ________________________________________ Explanation: You should first change the hard drive configuration settings in the computer's BIOS. This configuration includes the hard drive type, size, and geometry. If your hard drive is not configured appropriately in the system BIOS, the computer will not recognize the hard drive. In most cases, the hard drive settings are automatically configured using CMOS autodetection. The autodetection feature takes the work out of configuring a hard drive.
Daniel is a subscriber to your company's online tech forum and is complaining that he can no longer access it although no other subscribers have called. You have no problem connecting to the tech forum. What would you tell Daniel to do? A. Check his Ethernet connection. B. Use Control Panel to change his hardware settings. C. Use Control Panel to change his network settings. D. Use Windows Update to update his computer.
Answer: Check his Ethernet connection. Explanation: You should tell Daniel to check his Ethernet connection. The number one A+ rule for connectivity issues is to always check the connection. If more than one subscriber was complaining, it is likely that there is a wider issue, including the forum is down or a server is down.
Aaron has just been hired as your new tech support. You are explaining different RAM types to him. Which random access memory (RAM) technology would you tell him fetches 4 bits of data per clock cycle and uses 1.8 V to operate? A. SDRAM B. SGRAM C. DDR SDRAM D. DDR2 SDRAM
Answer: DDR2 SDRAM Explanation: DDR2 SDRAM uses differential pairs of signal wires to allow faster signaling without noise and interference problems to achieve higher throughput. DDR2 SDRAM uses 1.8 V to operate and fetches 4 bits of data per clock cycle, instead of 2 bits as with DDR SDRAM. DDR2 chips typically use Fine-pitch Ball Grid Array (FBGA) packaging rather than the Thin Small Outline Package (TSOP) chip packaging used by most DDR and conventional SDRAM chips.
Which statement is true concerning DHCP? A. DHCP is used to automate IP address assignment. B. DHCP is used to resolve host names to IP addresses. C. DHCP is used to resolve NetBIOS names to IP addresses. D. DHCP is used to verify the IP address on a Windows-based computer.
Answer: DHCP is used to automate IP address assignment. Explanation: Dynamic Host Configuration Protocol (DHCP) is a standards-based networking protocol that is used to automate the assignment of IP addresses to DHCP client devices. DHCP is a client/server protocol that uses two components, one on the server and one on the client. The server-side component stores a pool of available IP addresses. The client-side component requests a TCP/IP configuration from an available DHCP server. Several server operating systems support the DHCP server service, including Windows NT Server, Windows 2000 Server, Windows Server 2003/2008, Novell NetWare 6, and Red Hat Linux 9. Most desktop operating systems support the DHCP client service. Domain Name System (DNS) is a network service that is used to resolve host names to IP addresses. DNS is used extensively on the Internet; for example, DNS can be used to resolve the host name www.verigon.com to that Web server's corresponding IP address. Windows Internet Naming Service (WINS) is a network service that can be used to resolve NetBIOS names to IP addresses. NetBIOS names are also known as Windows computer names. The ipconfig command can be used to verify the IP address of a Windows-based computer.
If you were explaining various RAM types to a new user, which type of computer memory module uses 168 pins? A. SIPP B. SIMM C. DIMM D. DIPP E. RDRAM
Answer: DIMM Explanation: Dual inline memory modules (DIMMs) have 168 pins. Some DIMM designs have 72 or 144 pins. These are known as Small Outline DIMMs; normally used in portable computers, they are often referred to as SODIMMs. DIMM modules are eight bytes wide and transfer eight bytes (64 bits) of data at a time. With DIMMs made of older SDRAM (synchronous DRAM) memory chips, the data is transferred once per clock cycle. However, with DDR SDRAM and DDR2 SDRAM, the data is transferred two times per clock cycle: once on the leading edge of the clock signal and again on the falling edge. This allows large amounts of data to be transferred per clock cycle. For example, in a Pentium 4 system with a front-side bus operating at 400 MHz, up to 6,400 MB of data is transferred to and from the DDR2-DIMMs per second. DDR SDRAM comes in 184-pin DIMMs.
PICTURES You need to install a new video card in a Windows XP Professional computer. You need to ensure that the installed technology supports both analog and digital transmissions. Which technology should you install? A. DVI-D B. DVI-I C. DVI-A D. HDMI
Answer: DVI-I ________________________________________ Explanation: Digital Video Interface-I (DVI-I) technology supports both analog and digital transmissions. DVI technology is newer than Video Graphic Array (VGA) technology.
You are nearing the completion of an upgrade that involves implementing a new network infrastructure and upgrading the operating systems running on your network servers. Currently, static IP addresses and HOSTS files are used. The upgrade has included implementing DNS, implementing DHCP, and moving servers and other resources to a new location with new IP addresses. However, you cannot access the resources that were moved using their host names from any of the client workstations. You can access them by their IP addresses. What should you do first? A. Enable NetBIOS over TCP/IP. B. Delete the HOSTS file on each workstation. C. Import the workstations' names and address mapping to DNS. D. Configure DHCP to supply a different range of IP addresses to the workstations.
Answer: Delete the HOSTS file on each workstation. Explanation: You should delete the HOSTS file on each workstation. Workstations read entries in their HOSTS files before making requests to DNS. In this scenario, this behavior would cause the workstation to use the incorrect IP address when attempting to access a server by its host name.
You have implemented a hardware firewall on a small office network. You need to ensure that all HTTP packets are automatically sent to the Web server. What should you do? A. Enable port triggering. B. Enable port forwarding. C. Enable NAT. D. Enable QoS.
Answer: Enable port forwarding. ________________________________________ Explanation: You should enable port forwarding. Port forwarding allows you to enable a specific port in the firewall and direct traffic that comes from outside your network to a specific IP address. For example, in this scenario, you would open port 80 on the firewall and configure port forwarding to forward all incoming traffic to the Web server.
Which technology allows a single processor to handle two independent sets of instructions at the same time? A. CPU throttle technology B. dual-core technology C. dual independent bus (DIB) D. Hyperthreading (HT) technology
Answer: Hyperthreading (HT) technology Explanation: Hyperthreading (HT) technology allows a single processor to handle two independent sets of instructions at the same time. HT technology converts a single physical processor into two virtual processors.
Aaron has been hired as the new PC repair technician. He has a motherboard has a Socket AM3+. He has two different Socket AM3 CPUs that have lost their original packaging. What should Aaron do? (Choose all that apply.) A. Remove the AM3+ socket from the motherboard, and replace it with an AM3 socket. B. Purchase a new motherboard with an AM3 socket. C. Purchase a new AM3+ processor. D. Install the one of the AM3 processors into the AM3+ socket.
Answer: Install the one of the AM3 processors into the AM3+ socket. Explanation: Aaron should install one of the AM3 processors into the AM3+ sockets because they are completely compatible. AM3 processors include the Phenom II, Athlon II, Sempron, and Opteron 138x. AM3+ processors include the Phenom II, Athlon II, FX, and Opteron 3000.
Which of the following statements is true regarding RG6 coaxial cable? A. It should be used in situations that require lower frequencies than 50 MHz. B. It is thicker than RG59 coaxial cable. C. Its signal quality is NOT as good as that of RG59 coaxial cable. D. It does NOT have a foil shield
Answer: It is thicker than RG59 coaxial cable. Explanation: RG6 coaxial cable is thicker than RG59 coaxial cable.
You have a bootable DVD that includes virus-scanning software. However, when you insert the DVD into a computer's DVD drive and reboot the computer, the computer still boots normally. What is the problem? A. You need to change the BIOS boot order. B. You need to put the CD into a CD-ROM drive C. You need to use Safe Mode from the Advanced Boot Options menu. D. You need to use Safe Mode with Command Prompt from the Advanced Boot Options menu.
Answer: You need to change the BIOS boot order. Explanation: You need to change the BIOS boot order. The computer will not boot using the bootable CD because the hard drive has a higher boot priority than the DVD drive. This can also be a problem if you try to boot using a floppy disk.
Christine has a motherboard with a Socket 1156 and has called you to see if a Socket 1150 CPU could be used in its place. What would you recommend that she do? A. Purchase a new motherboard that has an 1150 socket. B. Upgrade the socket on the existing motherboard so it compatible with an LGA 1156. C. Replace the heat sink. D. Replace the thermal paste and pins.
Answer: Purchase a new motherboard that has an 1150 socket. ________________________________________ Explanation: Intel motherboards with a Socket 1156, also known as Socket H , hold LGA Socket 1156 CPUs and have 1156 pins. An 1156 socket is not compatible with LGA Socket 1150 (Socket H3), which has 1150 pins and was compatible with 4th and 5th generation Core desktops and Xeon E3, v3 and v4 for server. Therefore, you should recommend that she purchase a new motherboard that has an 1150 socket. Alternatively, you could recommend that she purchase a new CPU. If both choices are an option, determining which has the best value for the price would help you to determine what to do.
Which of the following are you LEAST likely to see as a front-panel connector on a motherboard? A. USB port B. reset button C. SCSI port D. drive activity lights
Answer: SCSI port Explanation: You are LEAST likely to see a SCSI port as a front-panel connector on a motherboard. The front-panel connectors on a motherboard include USB port connectors, audio port connectors, power button connectors, power light connectors, drive activity light connectors, and reset button connectors. Each motherboard has fan connectors, power connectors, and jumpers on it that fulfill a specific purpose. Often jumpers must be configured in a certain way depending on the CPU that is installed. The motherboard documentation will include details on how to configure the jumpers and connectors. The power connectors on a motherboard will either be 20 or 24 pins. Some motherboards may also include a connector for supplying extra power that is 4, 6, or 8 pins.
Which improvements does IPv6 provide over the current IP addressing scheme? (Choose two.) A. Some header fields have been dropped or made optional. B. Header fields have been made mandatory to reduce processing requirements. C. A new type of address is used to deliver a packet to a specific address node. D. The IP header options allow more efficient forwarding and less rigid length limits. E. The IP address size increased from 128 bits to 156 bits with simpler auto-configuration of addresses. F. The IP address size is increased from 64 bits to 128 bits with simpler auto-configuration of addresses.
Answer: Some header fields have been dropped or made optional. The IP header options allow more efficient forwarding and less rigid length limits. ________________________________________ Explanation: IPv6 (version 6) or IPng (next generation) offers the following improvements over IPv4: • IP address size will increase from 32 bits to 128 bits. • Some of the header fields have been dropped. • Version 6 has less rigid length limits and the ability to introduce new options. • Packets will indicate particular traffic type. • Support will be provided for data integrity and confidentiality. • The IPv6 header is 40 fixed bytes and has eight fields of information
You are troubleshooting a connectivity problem on an Ethernet network that contains both NetWare and Windows servers. A Windows 2000 client cannot connect to the Internet or any network resources. However, other computers on the same subnet as the client can access network resources and the Internet. You issue the ipconfig command at the workstation and find that the IP address assigned to the system's network adapter is 169.254.184.25 and its subnet mask 255.255.0.0. This IP network and subnet are different from the IP network and subnet that other computers on the same segment are using. Which option is the most likely problem? A. The computer selected the IP address using APIPA. B. The computer obtained the IP address from a NetWare server. C. The computer obtained the IP address from a Windows server. D. The computer obtained the IP address from a DHCP server it found on the Internet.
Answer: The computer selected the IP address using APIPA. ________________________________________ Explanation: Automatic Private IP Addressing (APIPA) is a feature of Windows operating systems that enables a system to automatically self-assign an IP address when a DHCP server is not available. APIPA acts as a DHCP failover mechanism, making support easier for small local area networks. APIPA uses the Address Resolution Protocol (ARP) to select a unique IP address in the reserved address range of 169.254.0.0 to 169.254.255.255 and a subnet mask of 255.255.0.0 when no DHCP server is available. Once the system has assigned itself an IP address, it can communicate with other devices on the LAN using TCP/IP, provided the devices are either configured for APIPA or manually set to the correct address range and a subnet mask.
An NTFS folder named Research is backed up on a regular basis. You restore the folder onto another hard drive but notice that the file permissions were not restored. What is the MOST likely reason this happened? A. File permissions were not saved during a backup. B. The files were restored on a FAT partition. C. An error occurred while restoring the files. D. The original files were encrypted.
Answer: The files were restored on a FAT partition. ________________________________________ Explanation: It is most likely that the files have been restored on a FAT partition. While NTFS partitions allow files to be configured with individual permissions, FAT partitions do not. While you can restore NTFS files on a FAT partition, the NTFS file permissions will be lost.
A user has been given a new laptop computer. The user has always worked with a desktop computer. He contacts you asking about the wireless Function key on the laptop computer. What can you configure with this key in a laptop? A. Turn on and off the wireless adapter. B. Increase and decrease the wireless signal strength. C. Cycle through the different wireless frequencies. D. Cycle through the different wireless channels.
Answer: Turn on and off the wireless adapter. Explanation: With the wireless Function key, you can turn the wireless adapter on and off.
Which type of communication is an HDMI port and cable designed to transmit? A. video only B. audio only C. both video and audio D. data only
Answer: both video and audio Explanation: A High-Definition Multimedia Interface (HDMI) port and cable is designed to transmit both video and audio over the same cable. There are three main sizes of HDMI ports: regular HDMI, mini-HDMI, and micro-HDMI port, as shown in the following exhibit:
A user's computer is experiencing overheating problems. What is the most likely cause of this problem? A. dust B. humidity C. power sags D. power surges
Answer: dust Explanation: Dust is the most likely cause of computer overheating. For this reason, you should often clean your computer, both inside and out, to ensure that dust accumulation does not occur. All users should be educated on computer cleaning methods to ensure that dust buildup does not occur.
What are the two most important factors to consider when selecting a replacement power supply for a desktop computer? (Choose two.) A. fan type B. form factor C. voltage levels D. output capacity in watts
Answer: form factor output capacity in watts Explanation: When replacing a power supply, you should first look for a replacement that fits the form factor of the computer. Power supplies are designed to operate with specific form factors, such as ATX and ATX12V v1.x that connect to the motherboard with a 20-pin version connector. The ATX12V v2.x and micro ATX all use the standard 24-pin connector.
What is the main difference in the physical composition of UTP and STP cable? A. wire gauge B. mesh shielding C. number of twists in the wires D. separators between the wire pairs
Answer: mesh shielding Explanation: Shielded twisted-pair (STP) cables are identical to UTP except for the shielding that encloses the twisted pairs. This metallic shield protects the STP cable from interference caused by fluorescent light fixtures, motors, and other electromagnetic interference (EMI) sources. STP cables can be used in any implementation where UTP cables are used, but they are generally only used when shielding from EMI is required because it is more expensive than using UTP cables. UTP cables are used in telephone and network wiring. These are the cables most commonly used in networks today.
PICTURE You suspect that a hacker has compromised a computer using one of its open ports. Which command would allow you to view the open ports on the computer? A. netstat B. net use C. tracert D. ssh
Answer: netstat ________________________________________ Explanation: The netstat command would allow you to view the open ports on the computer. The parameters used with the netstat command are shown in the following exhibit:
You are the desktop administrator for your company and maintain all the computers in your organization. To properly upgrade one of the computers, you must upgrade the motherboard. While upgrading this computer, you should choose the appropriate form factor that is suitable for the motherboard of the existing computer. Which two specifications should you consider while selecting the appropriate form factor? (Choose two.) A. physical size B. power supply C. number of PCI slots D. supported amount of memory
Answer: physical size power supply Explanation: Form factor largely defines the physical size and the power supply supported on a motherboard. Each type of form factor will have a standard physical size for the motherboard. There may be deviations from the standard size of a motherboard for motherboards made by certain manufacturers, but the physical size of the motherboard is largely defined in the form factor specifications. The power supply supported by a particular form factor may not be supported by another form factor of the motherboard. For example, there is a difference in the power supply used for PIII and PIV motherboards. The power supply connectors that connect to the motherboard are different in size, shape, and power ratings.
You are a desktop engineer for Verigon Corporation. Gloria Taylor requires a PCI network interface card and a PCI sound card installed in her computer. Her computer has three PCI slots, two of which contain the video card and the modem, respectively. Which card should you use to attach both the PCI network interface card and sound card to the computer? A. riser card B. PCMCIA card C. USB PCI card D. flash memory card
Answer: riser card ________________________________________ Explanation: You should use a riser card to attach both the PCI network interface card and the sound card to the computer. A riser card is an expansion card that can be directly connected to the motherboard on a PCI or ISA slot. Riser cards have several slots to hold additional cards, such as PCI or ISA that work in parallel with the motherboard. A riser card is commonly used in low profile extended (LPX) and new low-profile extended New Low Profile Extended (NLX) computers because these form factors are for slim-line cases.
You have replaced the memory in a laptop computer. What would cause the reported memory to be lower than the actual physical memory? A. parity B. shared video memory C. cache D. ECC memory
Answer: shared video memory ________________________________________ Explanation: Shared video memory would cause the reported memory to be lower than the actual physical memory. A discrepancy in the amount of memory could also be caused by memory that was not seated properly. Parity is an error-detecting mechanism included in some types of RAM. Cache is a type of memory that stores data for faster access. ECC memory is a type of memory that includes extra bits for error detection.
A user contacts you stating that his laptop is making a weird buzzing noise. When you examine the laptop, you notice that the buzzing noise is coming from the bottom of the display assembly. Which device should you probably replace? A. the motherboard B. the display screen C. the inverter board D. the hard drive
Answer: the inverter board Explanation: You should probably replace the inverter board in the display assembly. The buzzing noise can be a sign that the inverter board is failing. When the inverter board fails, the image on the screen will be dim or dark, even when you adjust the brightness settings. One good test for video display problems with a laptop is to connect the laptop to an external monitor. If the external display is good, then the internal video card is not the problem. The problem is most likely caused by the inverter or the backlight
Beverly has contacted you and stating that her computer will not boot and keeps beeping. Which components must pass a computer's power-on self-test (POST) before an operating system will load? (Choose three.) A. the memory B. the keyboard C. the video card D. the hard disk drive E. the network interface card (NIC) F. the central processing unit (CPU)
Answer: the memory the video card the central processing unit (CPU) ________________________________________ Explanation: A computer will not load an operating system if it encounters fatal errors during the POST. A central processing unit (CPU), memory, or video card failure during the POST routine will generate a fatal error and halt the startup process.
A client, Warren, reports CMOS mismatch errors at startup. Further conversation with Warren reveals that he had forgotten the startup password he assigned in CMOS, and he had to clear all CMOS settings for his computer to complete a successful startup. Although he can now start his computer, he continues to observe CMOS errors each time he starts the computer. He replaced the CMOS battery, but the problem continues. Which component should you investigate first to resolve the problem? A. the CMOS battery voltage B. the presence of new hardware C. the system board jumper settings D. the availability of a BIOS flash for the CMOS
Answer: the system board jumper settings ________________________________________ Explanation: You should first investigate the system board's jumper settings, specifically the jumper that is used to clear the complementary metal-oxide semiconductor (CMOS) settings. A common method for clearing CMOS settings, including the startup password, is to use a jumper on the system board that is specifically designed for clearing CMOS settings. If Warren selected this method for clearing his password, then he may have neglected to move the jumper back to its original position after the settings were cleared. If this jumper is left in the clear settings position, then the system board will continue to clear all CMOS settings at each startup. A computer that is unable to retain CMOS information between startups may also have a CMOS battery that has failed. If the system board jumpers are set correctly, your second step should be to check the voltage of the newly installed CMOS battery. Occasionally, even new components are defective. You should also examine the battery compartment for corrosion, because corroded contacts would prevent a battery from providing power to the CMOS chip.
When replacing laptop components, which device always involves the detaching and re-attaching of antenna connectors? A. the screen B. Mini-PCIe C. the touchpad D. the wireless card
Answer: the wireless card Explanation: Replacing the wireless card, you need to detach and re-attach the antenna connectors. This is usually replaced using an access slot on the bottom or side of the laptop.
Why should you calibrate a touch screen monitor? A. to align the touch screen's colors with the display B. to align the touch screen's resolution with the display C. to align the touch screen's coordinates with the display D. to align the touch screen's refresh rate with the display
Answer: to align the touch screen's coordinates with the display Explanation: You should calibrate a touch screen monitor to align the touch screen's coordinates with the display. The coordinates on the screen must be close to the coordinates of the display's picture. Otherwise, the computer will not respond appropriately. The touch screen is considered an input device, while monitors and other display devices are considered output devices.
PICTURES Identify the North Bridge chip on the motherboard. Click the Load button to open the interactive. Click to select the appropriate component. Click OK when your selection is complete.
PICTRURES
