Per Scholas Study Guide for 1 through 9

A network technician used a tool that energizes each wire in a cable. When the technician sent energy to some of the wires, the LED on the tool did not light up. What tool was the technician using?

Cable tester - The technician was using a cable tester, which is a pair of devices that attach to each end of a cable and energize each wire in the cable to test if the wire is conducting a signal.

A desktop technician has responded to a user whose computer is running slow. The user claims they did not do anything that would cause the computer to run slow. What should the technician do to try to determine the probable cause of the problem? (Select all that apply.)

Conduct research. - The technician should conduct research to identify or clarify symptoms and possible causes. One of the most useful troubleshooting skills is being able to perform research to find information quickly. Question the obvious. - The technician should question the obvious as sometimes the simplest things cause seemingly intractable problems. Diagnosis requires both attention to detail and a willingness to be systematic.

A cloud service provider is taking advantage of software-defined networking (SDN) to allow customers to provision and deprovision cloud resources on-demand. Which layer of SDN does the SDN controller operate on?

Control - In software defined networking, the SDN controller operates on the control layer between the application layer and the infrastructure layer.

A technician is troubleshooting a failed redundant array of independent disks (RAID) configuration and is unable to access the RAID configuration utility. What does this indicate?

Controller failure - If the technician cannot access the RAID configuration utility, this indicates that the controller itself is likely to have failed. However, the data on the volume should be recoverable.

A network technician is configuring hosts to request IP configuration from a server. What protocol is the technician configuring?

DHCP - The technician is configuring Dynamic Host Configuration Protocol (DHCP) which is a protocol used by clients to request IP configuration information from a server.

A support technician manages mostly digital displays but has some older computers with video cards that can support both analog and digital monitors. What type of video interface do these older computers have?

DVI The older computers have a digital visual interface (DVI) that supports both analog and digital outputs. DVI is no longer in active development and is only on older display devices and video cards.

A desktop technician just fixed an issue where a computer would not connect to a network and verified the computer is communicating with the network again. What should the technician do now that will help with future troubleshooting efforts?

Document findings. - The technician should document the findings which is very useful for future troubleshooting. Technicians can see if the same solution applies to future problems fitting into the same category.

Every time a user attempts to save a file, the computer shows an error that reads, "Cannot read from the source disk." What kind of issue does this indicate?

Drive issue - A "cannot read from the source disk" error indicates an issue with a fixed disk drive that is failing. Bad sectors typically cause this on a hard disk drive.

A hardware technician is working on a new desktop that can send 128 bits of data per transfer rather than 64 bits. What is this referred to as?

Dual channel This is a dual channel memory controller as there are effectively two 64-bit pathways through the bus to the central processing unit (CPU) meaning that each transfer can send 128 bits of data.

A network technician troubleshoots a computer that is getting a limited connectivity message and an address in the automatic IP addressing (APIPA) 169.254.x.y range instead of receiving a lease for an IP configuration from the DHCP server. What are some steps the technician should take to troubleshoot this issue? (Select all that apply.)

Establish the scope of the issue. - The technician should establish the scope of the issue. If the issue affects multiple users, the problem is likely to be the Dynamic Host Configuration Protocol (DHCP) server itself. Check the configuration of patch cords. - The technician should check the configuration of the patch cords and verify that the wall port connects to an appropriate port on a switch via the patch panel. Check the VLAN configuration. - The technician should check the virtual LAN (VLAN) configuration. If the switch port does not have the correct VLAN ID, it can have the same effect as connecting the host to the wrong switch port.

A networking student is learning about IP addressing and discovers which of the following facts are NOT true regarding IPv6?

Expressed in dotted decimal notation. - To make IPv4 addresses easier to use, they are in dotted decimal notation. IPv6 addresses are in hexadecimal notation.

A hardware technician is building a server that will process financial data in real time and wants to use error correcting code (ECC) RAM that will detect and correct errors, if possible. What other considerations will the technician need to include to support the ECC RAM? (Select all that apply.)

Extra processor chip - The technician will need to include an extra processor chip on the module for the ECC RAM to store the 8-bit checksum the ECC RAM calculates 72-bit data bus - The technician will need to include a 72-bit data bus rather than the regular 64 bits to support the functions of the ECC RAM in the server.

A web designer plans out a new website, including the uniform resource locators (URLs) for each page. What are parts of the URL that the web designer will need to consider? (Select all that apply.)

FQDN - The designer will need to consider the fully qualified domain name (FQDN) which is not case sensitive. The host location can also be an IP address; an IPv6 address must be in square brackets. Protocol - The designer will need to consider the protocol which describes the access method and will likely be HyperText Transfer Protocol (HTTP) or HyperText Transfer Protocol Secure (HTTPS). File path - The designer will need to consider the file path which specifies the directory and file name location of the resource (if required). The file path may or may not be case sensitive.

A web designer is securely uploading files to a web server. What protocol is the designer using to do this?

FTPS - The plain File Transfer Protocol (FTP) allows a client to upload files to a web server, but it is unencrypted and poses a high-security risk. FTP-Secure (FTPS) encrypts FTP sessions and is more prevalent than FTP now.

A company hires a network technician who is reviewing the network setup documentation. The technician sees that the company has fiber optic cable running all the way up to the building. This represents what type of connection?

FTTP - A fiber to the premises (FTTP) internet connection means that the service provider's fiber optic cable runs all the way to the customer's building.

An engineer is designing a new computer system and wants to provide active cooling to improve airflow and dissipate heat from around the components. What will the engineer use in the system?

Fans - The engineer will use fans, which actively improve airflow and help to dissipate heat. Engineers use fans on the power supply and chassis exhaust points.

A user started a brand-new computer and received a "boot device not found" error. When the technician inspects it, what will they suspect the problem is?

GPT - The technician will suspect the problem is with the GPT as this is a modern boot scheme where the boot information is not on a single sector but still identifies partitions and OS boot loaders.

A network technician is purchasing cellular phones for people who are travelling to a rural area and wants to make sure they will work with the most networks, as the areas do not have the latest cellular technology. What type of phones will help the technician accomplish this?

GSM - Global System for Mobile Communication (GSM)-based phones allow subscribers to use a removable subscriber identity module (SIM) card to use an unlocked handset with their chosen network provider.

A technician using the adapter that the manufacturer built into a computer's motherboard wants to join a computer to a new and upgraded network that still uses the most common type of cable to connect. What kind of network is the company using?

Gigabit Ethernet - The company is using Gigabit Ethernet as many PC motherboards have a built-in 1000BASE-T Gigabit Ethernet compatible adapter.

A support technician is installing a PCIe card that will use a combination of system memory and dedicated memory. What type of card is the tech installing?

Graphics The support technician is installing a graphics adapter, also called a video card. Graphics adapters can have up to 12 GB of dedicated memory and may use a mix of dedicated and shared, or system, memory.

A hardware technician is scanning a computer's non-volatile storage devices for errors and infections. Which of the following will the technician include in the scanning? (Select all that apply.)

Hard disk drives - Hard disk drives are non-volatile storage that store data on metal or glass platters coated with a magnetic substance. Solid-state drives - Solid-state drives are non-volatile storage that use flash memory technology to implement persistent mass storage. Mass storage devices - Non-volatile storage devices, or mass storage devices, hold data when the system is off. Mass storage devices use magnetic, optical, or solid-state technology to store data.

A small company hired a network technician to upgrade its network. Surprisingly the company was still using a legacy hardware device that configures a network into a star topology. What device was this?

Hub - The company was using a hub, which is a legacy network hardware device that configured networks in what is referred to as a "star topology" because each end system is cabled to a concentrator (the hub).

A network technician is configuring an email connection that will have a permanent connection to the mail server. What kind of email connection is the technician configuring?

IMAP - The Internet Message Access Protocol (IMAP) is a mail retrieval protocol that supports permanent connections to a server and connecting multiple clients to the same mailbox simultaneously.

A technician is installing new RAM in a company's workstations. The IT supervisor wants all computers to have ECC RAM to ensure high levels of reliability. Which feature is not associated with ECC RAM?

If a motherboard supports UDIMM, you can use both types synchronously. - If a motherboard is configured to support unbuffered DIMM, it must have UDIMM RAM installed. It will not be able to support RDIMM RAM. Mixing non-ECC UDIMMs and ECC UDIMMs is unlikely to work. - Similar to mixing RDIMM and UDIMM, computers are configured to use ECC or non-ECC UDIMM, but never both.

A technician is troubleshooting an issue with a computer. Although the computer is on the network, the server will not authenticate a user. What kind of problem does this indicate?

Inaccurate date/time - If the computer does not correctly synchronize the date and time with other computers on the network, security systems such as authentication will not work.

A network technician sets up the wireless network in such a way that each client device connects to the network via an access point (AP). What type of configuration is this?

Infrastructure mode - Infrastructure mode means that the technician configures each client device (station) to connect to the network via an access point (AP).

A support technician opened a PC case and observed a small computer system interface (SCSI) connector plugged into the motherboard. What can the technician know to be true about the connector?

It connects the hard disk. now it's used for the connection of internal hard disk drives.

A support technician plugged a monitor with a USB C cable connector into a USB C port on the computer, but the monitor would not function. Why would the monitor not work?

It was not a Thunderbolt cable. USB-C may not work for display purposes without a Thunderbolt-capable cable. Thunderbolt uses the same connectors as a USB-C cable.

A network technician troubleshoots an issue where the video conferencing system keeps freezing up and dropping out. The technician determines that the router is not processing the signal fast enough. What is this type of issue known as?

Latency - This issue is known as latency which is the time it takes for a signal to reach the recipient. Processing delays at intermediate systems, such as routers, can cause latency to be worse.

A company uses a database that a developer wrote in-house. Since the database is not supported and the developer has left the organization, what is the database considered to be?

Legacy system - When a vendor no longer supports a system, it is a legacy system. This might be because the vendor has gone out of business or formally deprecated use of the product.

An organization located on a large piece of rural property needs to connect its office building on the north side of the property with its warehouse and shipping operation on the south side of the property. The organization decides to connect the locations using long-range fixed wireless. What frequency spectrum must the organization use to ensure that nobody else can use the same frequency band?

Licensed - A licensed frequency spectrum means that the organization purchases the exclusive right to use a frequency band within a given geographical area from the regulator.

As traffic is overloading an organization's website, the network administrator stands up another web server. What will the administrator configure to distribute traffic between the two servers?

Load balancer - A load balancer distributes client requests across server nodes in a farm or pool and can deploy in any situation where there are multiple servers providing the same function.

A college that has several campuses located in different parts of the city has hired a network technician. What type of network will the technician be working on?

MAN - The network technician will be working on a metropolitan area network (MAN), which can be a company with multiple connected networks within the same metropolitan area.

A support technician is working on a motherboard that is 12" x 9.6" and has seven expansion slots. Which form factor is the technician working with?

Mini-ITX Mini-ITX is a 6.7 inch (170 x 170 mm) square with one expansion slot. These are designed for small cases but do note that most mini-ITX boards can be mounted in ATX cases.

A hardware technician installed a new power supply unit (PSU) in a workstation and removed any unnecessary power connector cables. What type of PSU did the technician install?

Modular - The hardware technician is installing a modular PSU which has detachable power connector cables that allow the technician to reduce the number of cables to the minimum required.

A technician is troubleshooting a computer that will not turn on. The technician has verified that the wall socket and devices leading to the computer are working correctly. What could remain as an issue? (Select all that apply).

Motherboard - Since the technician verified power was working in the wall socket and verified all other power components between the wall socket and the computer, the motherboard is most likely an issue. Power supply unit - Since the technician verified power was working in the wall socket and verified all other power components between the wall socket and the computer, a faulty power supply unit is most likely an issue.

A software developer is creating an application that will run multiple parallel threads through the central processing unit (CPU) at the same time to reduce the amount of "idle time" the CPU spends waiting for new instructions to process. What type of process is the developer taking advantage of?

Multithreading The developer is taking advantage of multithreading which is when software runs multiple parallel threads through the CPU at the same time to reduce "idle time."

A network administrator configures an authentication, authorization, and accounting (AAA) server. Which component in the AAA server setup does not store authentication credentials, but acts as a transit to forward data between devices?

NAP - The network access server (NAS) or network access point (NAP) are appliances, such as switches, access points, and VPN gateways. These do not store authentication credentials but simply act as a transit to forward this data between the AAA server and the supplicant.

A network technician is upgrading a grocery store's checkout lines with contactless payment devices. What type of wireless technology are the payment devices based on?

NFC - The payment devices are based on near-field communications (NFC), which can work as both tag and reader to exchange information with other NFC devices.

A network technician wants all PCs on the network to go to a server to get their boot settings. What boot option in system settings will the technician configure on the PCs?

Network/PXE - The technician will configure the network/preboot execution environment (PXE) setting which uses the network adapter to obtain boot settings from a specially configured server.

A technician started up a computer and the power-on self-test (POST) issued a short beep. What does this indicate?

Normal POST - When POST runs and issues one short beep, this indicates a normal POST, and the system is OK. However, manufacturers configure most modern PCs to boot silently.

A technician is troubleshooting a projector that keeps randomly shutting down. What is the most likely cause?

Overheating - Overheating typically causes intermittent projector shutdown. Check that the projector's fan is working, that the vents are free from dust and obstructions, and that the ambient temperature is not too high.

A technician retrieved a computer from storage, powered it on, and shortly began to notice a burning smell. What does this indicate?

Overheating - Unusual odors, such as a burning smell or smoke, will almost always indicate something (probably the power supply) is overheating.

A technician is wirelessly transferring pictures from their camera to their computer. What kind of network does the technician establish?

PAN - The technician has established a personal area network (PAN) which refers to using wireless connectivity to connect to devices at a range of a few meters.

A network technician is installing a device with an inductor that will copy all the traffic coming through the cable to a monitor port. What type of device is the technician installing?

Passive TAP - The technician is installing a passive test access point (TAP) which is a box with ports for incoming and outgoing network cabling that physically copies the signal from the cabling to a monitor port.

A support technician is connecting an extended integrated drive electronics (IDE) cable to a PC's motherboard and knows that pin 1 on the cable must match up with pin 1 on the port. How can the tech know where pin 1 is on the cable?

Pin 1 has a red stripe. On the cable, pin 1 has a red stripe. Manufacturers also key the connectors to prevent technicians from inserting them the wrong way around.

A network technician uses a switch configuration interface to see how long the port remains in the up state and that it is continually transitioning between up and down states. What does the network technician witness?

Port flapping - Port flapping is when the network interface card (NIC) or switch interface transitions continually between up and down states. Bad cabling, external interference, or a faulty NIC at the host end can cause this to happen.

Company employees access the same resources on the internet many times a day. As such, a network administrator configures a solution that forwards traffic to and from the internet and also caches content to improve performance and reduce bandwidth consumption. What solution is the administrator implementing?

Proxy server - A proxy server takes a whole HTTP request from a client, checks it, then forwards it to and from the destination server on the internet. It also caches content to improve performance.

A system engineer is configuring fault tolerance with a configuration that uses a logical striped volume with two mirrored arrays. What redundant array of independent disks is the engineer using?

RAID 10 - The engineer is configuring RAID 10 which is a nested RAID configuration that combines a logical striped volume (RAID 0) configured with two mirrored arrays (RAID 1).

A network technician securely connects to a remote server on port 3389. What protocol does the technician use?

RDP - Remote Desktop Protocol (RDP) is Microsoft's protocol for operating remote graphical user interface (GUI) connections to a Windows machine. RDP uses port TCP/3389.

A network technician needs to replace a broken Ethernet cable. What kind of connector will the technician use to terminate the new cable?

RJ-45 - Modular RJ-45 connectors terminate twisted pair cabling for Ethernet. RJ45 connectors are also known as "8P8C," standing for eight-position/eight-contact.

A cloud administrator configures a cloud instance to increase its resources during times of high utilization and decrease its resources when peak utilization times end. What cloud characteristic does this represent?

Rapid elasticity - Rapid elasticity refers to the system's ability to handle changes to demand in real time. A system with high elasticity will not experience loss of service or performance if demand suddenly increases.

A desktop technician determined that a computer could not connect to the network because the network drop was not working. What possibilities are open to the technician for getting the computer back on the network? (Select all that apply.)

Repair the drop. - A possibility that is open to the technician is to repair the drop. The technician needs to determine whether the cost of repair makes this the best option. Implement a workaround. - A possibility that is open to the technician is to implement a workaround. If neither repair nor replacement is cost-effective, it may be best to find a workaround. Replace the drop - A possibility that is open to the technician is to replace the drop. This option is often more expensive and may be time-consuming if a part is not available.

A technician is troubleshooting a video display that is fuzzy. What has caused this?

Resolution mismatch - If the output resolution does not match the display device's native resolution, the image will appear fuzzy. This typically happens if the video card's driver is faulty or incorrectly configured.

An energy company is upgrading its systems. The company would like to control the systems with software that communicates with the current programmable logic controllers (PLCs) and new RTUs. What kind of system is the company upgrading to?

SCADA - The company is upgrading to a supervisory control and data acquisition (SCADA) system which takes the place of a control server in large-scale, multiple-site ICSs.

A hardware technician is tearing apart a non-functioning computer to salvage parts and pulls out a memory stick that synchronizes its speed to the motherboard system clock. What type of memory has the technician removed?

SDRAM - The technician removed synchronous DRAM (SDRAM) which is known as that because its speed synchronizes with the motherboard system clock.

All the employees in a lawyer's office communicate with the internet and each other through the same appliance. What kind of network is the office using?

SOHO - The office uses a small office home office (SOHO) LAN, which is a business-oriented network using a single networking appliance to provide LAN and internet connectivity.

A hardware technician is purchasing mass storage devices and tells the salesperson that they must use flash memory technology. What type of devices will the salesperson show the technician?

SSD - The salesperson will show the technician solid-state drives (SSDs) which use flash memory technology to implement persistent mass storage.

A network technician needs to deploy a computer on an Ethernet network and notices that the computer will sit on a shelf directly under a fluorescent light. What type of cable will the technician use?

STP - The technician will use shielded twisted pair (STP) which provides extra protection against interferences in environments with high levels of external interference, such as fluorescent lighting.

An energy company needs to protect trade secrets and wants to ensure that none of its PCs are hijacked by malware. Since there are no shared computers in the organization, what can a technician enable to ensure that will not happen?

Secure boot - The technician can configure secure boot which is a unified extensible firmware interface (UEFI) feature designed to prevent malware from hijacking a computer.

A company hired an administrator to manage their computers that host the employees' shared resources and applications. What kind of computers will the administrator manage?

Server - The administrator will manage the company's server computers. A company dedicates a server computer to running network applications and hosting shared resources.

A hardware technician is upgrading a device with multiple, identical central processing unit (CPU) packages. What class of computer is the technician most likely upgrading?

Server - The technician is upgrading a server-class computer. Server motherboards are often multi-socket, meaning that the technician can install multiple, identical CPU packages

A security technician is installing a doorbell/video entry system for a customer so that the customer can see and communicate with people who come to their home when they aren't there. What kind of device is the doorbell/video entry system?

Smart device - The doorbell/video entry system is a smart device which is a device or appliance that users can configure and monitor over an IoT network.

A technician loans a laptop to employees when they go on travel and each time an employee returns the laptop the technician reformats it and reloads the operating system and all the software. After several years of following this process, the laptop is sluggish and often freezes. What is most likely to cause this to happen?

Solid-state drives (SSDs) use flash chips that are susceptible to a type of degradation over the course of many write operations which would cause the laptop to be sluggish and freeze.

A network technician is upgrading a legacy network for a small business and is replacing their legacy hub with a device that learns MAC addresses and uses them to forward frames to only the destination port, rather than sending them out to every port. What kind of device is the technician replacing the hub with?

Switch - The technician replaces the hub with a switch that tracks MAC addresses for each of its ports and uses learned MAC addresses to forward frames to the destination port only.

A network technician is purchasing a digital subscriber line (DSL) service for a business that transfers large amounts of data back and forth between branches. What is the best connection type for the business?

Symmetric DSL - Symmetric versions of DSL offer the same uplink and downlink speeds and are of more use to businesses and for branch office links, where more data passes upstream than with normal internet use.

An application developer wants to ensure packets arrive at the destination in the correct order and none are lost when an application communicates across the network. Which protocol will the application developer use?

TCP - The Transmission Control Protocol (TCP) can identify and recover from lost or out-of-order packets. Failing to receive a packet or processing it incorrectly can cause serious data errors.

A technician is implementing a feature that will compare hashes of key system state data during the boot process to ensure that nobody has tampered with the system firmware, boot loader, and OS kernel. What feature is this?

TPM - The technician is implementing the trusted platform module (TPM) which, during the boot process, compares hashes of key system state data to ensure they have not been tampered with.

A hardware technician is following CompTIA's A+ troubleshooting model for diagnosing a monitor with a squiggly screen. The technician suspects the monitor screen is squiggly because it is located directly under a fluorescent light. What is the next step the technician should take?

Test the theory. - The technician has established a theory of probable cause so the next step in CompTIA's A+ troubleshooting methodology is to test the theory to determine the cause.

30.0% complete Question A network technician is trying to locate the Cat 6A cable in a closet full of unmarked boxes with different types of cabling in them. How will the technician be able to tell which cable is Cat 6A? (Select all that apply.)

The Cat specification is on the cable jacket. - The technician can locate the cable by looking at the cable jacket since manufacturers print the Cat specification on the cable jacket. The cable type is on the cable jacket. - The technician will locate the cable by looking at the cable jacket because manufacturers print the cable type, such as UTP unshielded twisted pair (UTP) or foiled/unshielded twisted pair (F/UTP), on the cable jacket.

A hardware technician is inspecting the notches on a dual inline memory module (DIMM) edge. What will the notches on the edge connector help the hardware technician determine? (Select all that apply.)

The DDR generation - The notches on a DIMM's edge connector help the hardware technician identify the double data rate (DDR) generation (DDR3/DDR4/DDR5). If it is compatible with the slot - The notches on a DIMM's edge connector help prevent the hardware technician from inserting the DIMM into an incompatible slot. How to insert it properly - The notches on a DIMM's edge connector help prevent the hardware technician from inserting the DIMM into a slot the wrong way around.

A support technician needs to install a legacy peripheral component interconnect (PCI) sound card. Which of the following statements about PCI is NOT true?

The PCI card can fit into the PCIe slot. PCIe (Peripheral Component Interconnect Express) motherboards can include PCI ports to support legacy adapter cards, but PCI cards cannot fit into PCIe slots.

A network technician is setting static IPv4 addresses on servers. Which settings would be considered optional for ensuring proper communications within a local area network? (Select all that apply.)

The gateway - The gateway parameter is the IPv4 address of a router and is the IP address to which packets destined for a remote network should go by default. This will be changed for groups of locally connected devices. The alternate DNS - The Domain Name System (DNS) and alternate DNS servers provide resolution of host and domain names to their IP addresses and are essential for locating resources on the internet.

Which of the following statements regarding most connectors and ports is NOT true?

They use internal connection points. An input/output (I/O) port is the external connection point for a particular type of bus interface and the connector is the part of a peripheral cable that inserts into a port with the same shape.

A support technician needs to install an optical disk drive in a tower. How will the technician connect the optical drive cables?

Through the side panel The technician will be able to hook up the optical media drive through the side panel. A tower case has a side cover that a technician can remove by sliding the panel from its housing.

A video production company uses removable media to transport multimedia files to partner and customer sites. Often, the media has to be prepared with only very short notice. In the past, the time taken to transfer files from the development workstations has resulted in delays and missed appointments. To mitigate this issue, the company has procured USB 3.2 Gen 2x2 storage devices and Windows PC workstation expansion cards. The devices and expansion cards support multiple USB hardware port types. Which of the following adapter cables will enable the devices to take full advantage of the highest transfer rate?

Type C to Type C Type C connectors and ports support data transfers at the USB 3.2 Gen 2x2 20 Gbps rate. The connector is also much smaller than Type A and is reversible. These improvements mean that other USB connector form factors are being phased out.

An application uses Transmission Control Protocol (TCP) as it requires data to make it to the destination 100% intact. Which of the following are functions of this protocol? (Select all that apply.)

Uses SYN/ACK packets. - TCP establishes a connection between the sender and recipient using a handshake sequence of SYN, SYN/ACK, and ACK packets. Uses negative acknowledgment. - TCP allows the receiver to send a negative acknowledgment (NACK) to force retransmission of a missing or damaged packet. Uses FIN. - TCP allows the graceful termination of a session using a FIN handshake. The main drawback is that this connection information requires multiple header fields.

A network technician is connecting a computer to the network using Ethernet. How is the physical connection to the cable made?

Using the RJ45 port - In Ethernet communications, a RJ45 port in the computer's network interface card (NIC) establishes the physical connection to the cable.

A network technician must allow employee computers to securely connect to the corporate network from alternate locations. What is the best method for the technician to use?

VPN - A virtual private network (VPN) enables hosts to connect to the LAN from locations other than the site by connecting to the local network via a secure remote access server.

A hardware technician is purchasing more servers for an organization and needs to ensure the power supply units in the data center have the correct output to support them. What is a power supply unit's output capability measured as?

Wattage rating - The wattage rating is the measurement of the power supply unit's output capability. Servers have units rated over 300 W to meet the demands of multiple CPUs, additional memory modules, etc.

A company hired a network technician to manage the part of their network that is based on the 802.11 standard. What type of network will the technician be managing?

Wi-Fi - The technician will be managing the Wi-Fi portion of the company's network. Most Wi-Fi networks are based on the IEEE 802.11 series of standards.

A wireless network technician is upgrading the access points in a conference center to provide better Wi-Fi connectivity during conferences. What standard will provide connectivity to the most clients?

Wi-Fi 6 - Wi-Fi 6 (802.11ax) can support up to eight clients, giving it better performance in congested areas. Wi-Fi 6 also adds support for uplink MU-MIMO and OFDMA.

A computer is processing software instructions on the central processing unit. How is all computer software broken down to be processed?

Binary All computer software works by running instructions in the central processing unit (CPU) and computers process all the software and data as the ones and zeroes of binary code.

A student is learning about computer hardware and the instructor selects them to identify the component that executes program instruction code. How should the student respond?

CPU The student should respond with CPU, or central processing unit. The CPU in a computing device executes the program instruction code.

A support technician has removed the case from a PC and sees a component in a square socket. What component has the support tech located?

CPU The support technician is removing the central processing unit (CPU). Unlike any other connectors, the CPU socket is square, and the heat sink and fan are on top of it.

A hardware technician is reinstalling a heat sink with a central processing unit (CPU). Which of the following steps should the technician take to reinstall the heat sink without damaging the socket? (Select all that apply.)

Clean it. - If reinstalling the same heat sink, the hardware technician should clean old thermal grease from the surfaces of the heat sink. Thermal paste. - When installing a heat sink, the hardware technician should apply a small amount of new grease in an X pattern. The technician should not apply too much—if it overruns, the excess could damage the socket. Wear an ESD wrist strap. - The technician should take anti-electrostatic discharge (ESD) precautions, such as wearing an ESD wrist strap, when handling and storing CPUs.

A desktop technician was troubleshooting a computer that would not connect to the network and suspected that the network interface card (NIC) was not working. However, when the technician tested the NIC, it was working. What will the technician do next?

Establish a new theory. - The technician would establish a new theory as the tests they made or research they conducted proved that their original theory was incorrect.

A manager directs a support technician to plug a device into the communications (COM) port. What port is the manager referring to?

Serial In Windows, the serial port, or Recommended Standard #232 (RS-232) port, is also known as a communications (COM) port.

A support technician is installing a new SATA hard drive on a new computer. What is the best type of cable connector the technician will plug in to supply power to the drive?

15-pin connector The technician will plug in a 15-pin SATA power connector to connect the hard drive to the PC's power supply.

A network technician is upgrading the wireless network so that it can take advantage of "multiple input multiple output" (MIMO) to increase reliability and bandwidth. What standard is the technician upgrading the wireless network to?

802.11n - The technician is upgrading the wireless network to 802.11n which uses MIMO to increase reliability and bandwidth by multiplexing signal streams from 2-3 separate antennas.

A network technician is checking the records to ensure all the host names match up with the proper IP addresses for the network. What records is the technician checking? (Select all that apply.)

A - An address (A) record is a resource record that resolves a host name to an IPv4 address. Network technicians can create and update resource records manually (statically). AAAA - An AAAA record is a resource record on a DNS server that resolves a host name to an IPv6 address. Client and server computers on the network can generate resource records dynamically.

A technician must determine why a computer is overheating. Which of the following may be the cause? (Select all that apply.)

A fan is not working. - A computer can overheat because a fan is not working. Proper cooling is vital to the lifespan and performance of the processor. The room is too warm. - A computer can overheat because the room is too warm. The technician should check whether the PC is near a hot radiator or in direct sunlight.

An administrator needs to supply power to a handset through the switch; however, the switch does not support Power over Ethernet (PoE). How can the administrator solve this problem?

A power injector - If a switch does not support PoE, the administrator can use a device called a "power injector." The administrator connects one port on the injector to the switch port and the other port to the device.

Which of the following central processing unit (CPU) architectures implements a system-on-chip (SoC) where all the controllers, including video, sound, networking, and storage, are part of the CPU?

ARM - Advanced RISC Machine (ARM) designs implement an SoC which means that all the controllers, including video, sound, networking, and storage, are part of the CPU.

A hardware technician is ordering power supply units (PSUs) for the organization's desktop computers. What type of form factor is the technician looking for the PSUs to have from the list below?

ATX - The technician is looking for the PSUs that have the Advanced Technology Extended (ATX) specification as most PSUs designed for use with desktop PCs are based on the ATX form factor.

A technician started a PC and, when the vendor's logo came up, pressed the F10 key. What is the technician doing?

Accessing the system setup program - The technician is accessing the system setup program via a keystroke during the power-on (boot) process when the PC vendor's logo displays.

A support technician needs to connect the USB port on a portable monitor to an HDMI port on a laptop to extend the laptop's display. What kind of cable will the technician use to accomplish this?

Adapter The technician will use an adapter cable to connect the HDMI port on the laptop with a USB port on the monitor. An adapter cable has connectors for two different cable types at each end.

A network technician troubleshoots a computer on the wired network that is experiencing slow network speeds. Which of the following would NOT be a possible cause for the technician to troubleshoot?

Another radio source broadcasting at the same frequency - Another radio source broadcasting at the same frequency would cause interference and result in slow speeds for wireless devices, but this would not be relevant to a wired network.

A network technician is troubleshooting an issue where a wireless device only receives an intermittent signal. What could be a possible cause of this? (Select all that apply.)

Another radio source is broadcasting at the same frequency. - If a device is within the supported range but the signal is intermittent, there is likely to be interference from another radio source broadcasting at the same frequency. There is an electromagnetic source nearby. - Interference from a powerful electromagnetic source, such as a motor or a microwave oven, can cause an intermittent wireless signal. Something is blocking the signal. - Radio waves do not pass easily through metal or dense objects. Construction materials, such as wire mesh, foil-backed plasterboard, concrete, and mirrors, can block or degrade signals.

A technician is upgrading the system firmware on a PC. Which of the following is the technician upgrading? (Select all that apply.)

BIOS - The technician is upgrading the basic input/output system (BIOS) which is the system firmware for a PC that only supports 32-bit operation and limited functionality. UEFI - The technician is upgrading the unified extensible firmware interface (UEFI) which provides support for 64-bit CPU operation at boot and many other functions.