Dion Practice 6
Your company has two office buildings which are connected via a copper network cable that is buried underground. There is some construction being performed near the buildings. Now, the second building discovers they have suffered a network outage that doesn't appear to be temporary. What is the MOST likely cause of the outage? -Signal attenuation on the cable -An open circuit has been created -Cross-talk on the cable -Electromagnetic interference on the cable
-An open circuit has been created [Since the issue started after construction began, it is most likely that the construction crew broke the cable during digging operations. This can cause an open circuit or short circuit, depending on how the cable was cut or broken by the construction workers. This can be verified using a Time-Domain Reflectometer to determine exactly where in the cable the break has occurred. Once the location is identified, the cable can be repaired or spliced to return it to normal operations.]
A penetration tester wants to build a workstation that will be used to brute force hash digests. Which of the following is the BEST option to ensure sufficient power and speed to crack them? -Integrated GPU -Multi-core CPU -7200-RPM HDD -Dedicated GPU
-Dedicated GPU [Dedicated GPUs are designed to conduct complex mathematical functions extremely quickly. If you want to build a system to perform the cracking of a password, hash, or encryption algorithm, it is important to have a high-speed, dedicated GPU. The reason to use a GPU instead of a CPU for password cracking is that it is much faster for this mathematically intensive type of work. Cracking passwords, hashes, and encryption is a lot like mining cryptocurrency in that using dedicated GPUs will give you the best performance.]
Which of the following statements about the 5.0 GHz wireless frequency used by Wi-Fi is correct? -The 5.0 GHz frequency has more channels available than 2.4 GHz -The 5.0 GHz frequency is more effective at penetrating solid surfaces than 2.4 GHz -The 5.0 GHz frequency supports lower data rates than 2.4 GHz -The 5.0 GHz frequency has a shorter wavelength that allows the signal to travel further than 2.4 GHz using the same power levels
-The 5.0 GHz frequency has more channels available than 2.4 GHz [The 5.0 GHz frequency has more individual channels giving it less congestion and interference than the 2.4 GHz frequency. The 5.0 GHz frequency supports higher data rates than the 2.4 GHz frequency due to lower levels of congestion and interference. The longer wavelength of 2.4 GHz makes it better at propagating through solid surfaces than the 5.0 GHz frequency. The 2.4 GHz frequency has a longer wavelength than the 5.0 GHz frequency. This longer wavelength gives the 2.4 GHz frequency the ability to cover a longer range using the same power output levels.]
Which of the following is used to connect Cat 5e or above networks in an MDF or IDF? 110 punchdown block RJ-11 66 punchdown block F type
110 punchdown block [A 110 punchdown block is a type of punch block used to terminate runs of on-premises wiring in a structured cabling system. The designation 110 is also used to describe a type of insulation displacement contact (IDC) connector used to terminate twisted pair cables when using a punch-down tool similar to the older 66 punchdown block. A 110 punchdown block provides more spacing between the terminals and is designed for Cat 5 networks to eliminate crosstalk between the cables. F type connectors are used for coaxial cables, not Cat 5e network cables. RJ-11 is used to terminate telephone lines, not Cat 5e network cables.]
What type of cable is most commonly used to terminate a serial connection to a modem?
DB-9 [A DB-9 connector is used to terminate an RS-232 serial cable. A ST, SC, LC, or MTRJ connector is used to terminate a fiber optic cable. An RJ-11 connector is used to terminate cables used for phone lines. An RJ-45 connector is used to terminate a copper twisted-pair Ethernet cable.]
You are troubleshooting an issue with an impact printer in an automotive service department. The printer has begun to print unevenly. As the print head goes from left to right across the page, the printout goes from darker to lighter. What is the MOST likely cause of this issue?
Defective ribbon advance mechanism [An impact printer has teeth along the paper's edges that pull the paper along a tractor as it prints. This moves the paper up one line at a time. The print head moves from left to right across the page, impacting the print head through the ribbon to mark the paper. If the ribbon advance mechanism is defective, the ribbon will not advance as the print head goes across the page, leading to a lightening of the ink being marked on the paper. If the printer ribbon itself were worn out, it would be lighter in color as you went down the page (not from left to right).]
Which of the following network performance metrics is used to represent the round-trip time it takes for a packet to be sent by a device to a server and then a response received from that destination server?
Latency [Latency is the measure of time that it takes for data to reach its destination across a network. Usually, we measure network latency as the round-trip time from a workstation to the distant end and back. Bandwidth is the maximum rate of data transfer across a given network. Now, bandwidth is more of a theoretical concept that measures how much data could be transferred from a source to a destination under ideal conditions. Throughput is an actual measure of how much data is successfully transferred from the source to a destination. Therefore, we often measure throughput, instead of bandwidth, to monitor our network performance. Jitter is a network condition that occurs when a time delay in the sending of data packets over a network connection occurs. Jitter is a big problem for any real-time applications you may be supporting on your networks, like video conferences, voice-over IP, and virtual desktop infrastructure clients.]
Which of the following requires the use of a physical printer to print a document? Print to XPS Print to PDF Print to Image Print to Network
Print to Network [Printing to a network printer still requires access to a physical device connected to the network. The other options (Print to Image, Print to PDF, Print to XPS, and similarly Print to File) are all virtual printing methods. These methods will create a file of a specific type with the contents of the printed information. These methods allow a user the ability to print to a file, a PDF (Portable Document Format), XPS (XML Paper Specification - a Microsoft alternative to PDF), or an image (photo).]
You want to buy a new computer that will allow you to run at least 3 virtual machines (VMs) at the same time to practice for your CompTIA exams. You also know in the future that you would like to set up a virtual ethical hacking lab with numerous VMs to study for the CompTIA PenTest+ exam. Which TWO of the following components is the MOST important to upgrade if you want to simultaneously run numerous VMs?
RAM, CPU [If you want good performance for a computer used for extensive virtualization (such as multiple virtual machines running at once), you should maximize the CPU and the RAM. The CPU should support virtualization and be a multicore processor. The memory should be fast and contain at least 16 GB of RAM to host numerous VMs effectively. These are the most important components when building a virtualization machine to support numerous VMs.]
What type of connector is most commonly used to terminate a copper twisted-pair Ethernet cable?
RJ-45 [A copper twisted-pair Ethernet cable is usually terminated with an RJ-45 connector. Coaxial cables are normally terminated using an F type connector. An RS-232 serial cable is normally terminated with a DB-9 connector. A fiber optic cable normally uses an ST, SC, LC, or MTRJ connector.]
A client states that their computer is experiencing slow performance when reading or writing to the hard drive. You have already verified that it is not a system (software) performance issue, and the system is not overheating. Which of the following would be the BEST action to take in attempting to fix this problem?
Run the disk repair tool [Slow performance can be a symptom of overheating or other problems. Since we eliminated overheating as the cause, the issue is most likely caused by a file system problem. To fix this problem, you should try running the disk repair tool or run the Disk Defragmenter tool (for non-SSD devices) to optimize the file system and read/write performance. Since there are no grinding or clicking sounds being observed, it is unlikely that the hard drive will fail soon making backing up the hard drive a lower priority. The system cooling fans are not the issue otherwise the system would be overheating.]
Jay is complaining that the speed at which the cursor moves across his laptop's screen when using his trackpad makes it difficult to properly control. Which setting could he use to slow down the cursor in Windows 10?
Setting>Devices>Touchpad>Speed (If the speed of the pointer or cursor moving across the screen is difficult to control, a technician can reduce the touchpad's speed in Windows 10 under Settings. To open settings, press the Windows key and the "i" key. Next, open Settings and click/tap on the Devices icon. Then, click/tap on Touchpad in the left-hand column. On the right-hand of the screen, adjust the slider labeled "Change the cursor speed" to a speed that is more comfortable to use. The touchpad sensitivity setting is used to control the amount of pressure needed before the touchpad registers a click as input from the user.)
Which of the following network devices is used to put each connected network host to its own collision domain?
Unmanaged switch [A switch is a network device that receives incoming data into a buffer, then the destination MAC address is compared with an address table so that data is only sent out to the port with the corresponding MAC address. In a switched network, each port is in a separate collision domain. A managed switch is a switch with advanced networking functions and security settings that can be enabled and configured by an administrator. A hub provides no intelligence in its interconnection functions so that whatever is received on one port is repeated out every other port. This leads to many collisions occurring on the hub and increases the number of rebroadcasts which slows down the entire network. A repeater is an electronic device that receives a signal and retransmits it. Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction. Repeaters may be wired or wireless, and they rebroadcast whatever signal is received through their transmitter. A wireless access point (WAP), or access point, connects directly to a wired local area network and the AP then provides wireless connections using Wi-Fi for other devices to use that wired connection. An AP supports the connection of multiple wireless devices through their one wired connection.]
While working as a technician, you are trying to help a customer whose PC cannot boot up. When the computer is turned on, an error stating "bootable device not found" appears on the screen. What should you attempt first?
Verify that either the Molex or SATA cable is connected to the HDD [The very first step we want to check is to check the physical connections. This falls under step two of the troubleshooting methodology (question the obvious). If a PC was recently moved or repaired, the cable may have become disconnected and is no longer powering the hard drive. When working with these cables, it is considered a best practice to ensure connections are present, remove the connection, and then reseat it to fix the issue effectively. If this doesn't work, then the issue may be with the HDD itself.]
You are trying to install Hyper-V on a new laptop, but you keep receiving an error during installation that the software cannot be installed. Which of the following characteristics of the laptop's processor should you investigate as the MOST likely issue?
Virtualization (VT) Support [CPU Virtualization is a hardware feature found in all current AMD & Intel CPUs that allows a single processor to act as if it was multiple individual CPUs. This allows an operating system to more effectively & efficiently utilize the computer's CPU power to run faster. This is enabled or disabled on supported processors within your system's BIOS. HyperThreading (HT) is an Intel CPU architecture implemented to expose two or more logical processors to the OS to deliver performance benefits. The cache is an extremely fast internal memory located in the CPU. The number of cores is defined by the processor's multicore capability such as dual-core, quad-core, or octo-core.]
Which of the following technologies uses 2.4 GHz or 5 GHz frequencies to determine your location indoors based on the signal strength received or the angle of arrival of that signal to the mobile device?
Wi-Fi [Location services enable the device to know its position using its internal GPS receiver or its approximate location using its cellular radio. A mobile device can use its internal GPS, cellular, Bluetooth, or Wi-Fi radios to identify its location. Wi-Fi positioning systems use the signal strength or angle of arrival of a signal to determine the device's location within 1-4 meters. Bluetooth can be used within a building to provide an accurate of the device within 3-4 meters. The use of Bluetooth and Wi-Fi to determine the device's location is known as an internal positioning system (IPS). Cellular radios can provide an approximate location based upon the triangulation of your position between different cellular towers. A GPS (global positioning system) device is used to determine a receiver's position on the Earth based on information received from 24 GPS satellites, which operate in a constellation in Medium Earth Orbit (MEO). The receiver must have a line-of-sight to four of the GPS satellites continuously to accurately determine its position on the earth (latitude, longitude, and altitude). The device's GPS receiver can provide an accurate location up to 10 meters.]
Which of the following types of hard drives would be used in a gaming laptop to increase the system's boot-up performance while providing a large amount of storage at a lower overall cost?
hybrid drive [A hybrid hard drive (SSHD) is a storage drive that combines the large storage capacity of an HDD with the faster read/write speed of an SSD. The majority of the drive uses a spinning disk and actuator arm, like a traditional magnetic drive, but it also contains a small SSD (solid-state drive) as part of the combined hybrid drive unit. This allows data to be written to either the SSD portion (for data accessed more frequently like the OS and programs) while using the HDD portion to store larger amounts of rarely accessed files (such as photos and video files). Hybrid hard drives constantly monitor the data retrieved from storage, and it automatically determines which data you open the most. It places the files that you use most often on the SSD to read/write that data faster. A magnetic drive is a traditional hard disk drive (HDD). A hard disk drive (HDD) is a device providing persistent mass storage for a workstation or laptop by saving data even when the computer is turned off. Data is stored using platters with a magnetic coating that are spun under disk heads that can read and write to locations on each platter known as sectors. A solid-state drive (SSD) is a personal computer storage device that stores data in non-volatile special memory instead of on disks or tape. An optical drive is a storage device that uses a CD, DVD, or Blu-Ray disc to store and retrieve data.]
Which motherboard form factor measures 6.7" x 6.7" (17 cm x 17cm) in size?
mITX [The mITX (Mini-ITX) form factor is 6.7" x 6.7" in size (17 cm x 17cm). The mITX is commonly used in smaller computer systems with a small form factor (SFF) case. These motherboards are usually used in computers designed for passive cooling and a low power consumption architecture, such as a home theater PC system. The mATX (microATX) motherboard's form factor is 9.6" x 9.6" in size (24 cm x 24 cm). The mATX form factor is commonly used in smaller computer systems with a small form factor (SFF) case. An mATX motherboard is backward-compatible with the larger ATX motherboard since it contains the same mounting point locations as the full-size board. An ATX motherboard's form factor is 12" x 9.6" in size (305mm x 244mm). ITX is a series of form factors that began with the mini-ITX, but there is no specific size called ITX.]
A client has asked you to build a computer to use as part of their home theater (HTPC) system. The HTPC will be used primarily to stream videos in their living room and must have a small form factor to fit into their entertainment center next to their surround sound system. Which of the following motherboards would be the BEST choice for an HTPC system?
mini-ITX [A form factor means the physical dimensions of a system, and the motherboard form factor defines the size of the case you can use. There is no performance difference between different motherboard form factors, except for the size and number of expansion slots. Mini-ITX is the most commonly used form factor with HTPC systems because they require the smallest fans or passive cooling, which minimizes the noise produced by the system. A micro-ATX motherboard produces more heat and is larger than a mini-ITX motherboard. Micro-ATX motherboards also require a larger (and louder) fan to keep the system cooled, so it is a poor choice for an HTPC. An ATX or ITX motherboard is a bad choice since they are larger and would not fit into a traditional HTPC case.]
A cybersecurity analyst wants to install a network appliance to conduct packet capturing of the network traffic between the router and the firewall on the network. The device should not be installed in line with the network, so it must receive a copy of all traffic flowing to or from the firewall. Which of the following tools is required to meet these requirements?
network tap [A network tap is used to create a physical connection to the network that sends a copy of every packet received to a monitoring device for capture and analysis. A WiFi analyzer can determine the wireless network's signal strength, the frequencies in use, and any possible radio frequency interference. A tone generator is connected to a wall jack and sends a repeating signal over the cable. The probe can then be used to detect which cable is attached to the wall jack by detecting the signal being sent by the tone generator. The probe needs to be near or touch the cable with the tone generator attached to identify it positively. A cable tester is used to ensure a cable is properly created as a patch cable (straight through) or a crossover cable. Cable testers provide detailed information on the physical and electrical properties of the cable. For example, they test and report cable conditions, crosstalk, attenuation, noise, resistance, and other cable run characteristics.]
What is the lowest layer (bottom layer) of a bare-metal virtualization environment?
physical hardware [he bottom layer is physical hardware in this environment. It is what sits beneath the hypervisor and controls access to guest operating systems. The bare-metal approach doesn't have a host operating system. A hypervisor is a program used to run and manage one or more virtual machines on a computer. A host operating system is an operating system that is running the hypervisor. A host operating system is an operating system that is running the hypervisor.]
