b21 core 1
Which of the following represents the valid decimal range of an IPv4 address?
0 to 255
Which of the following are not valid IPv4 addresses? (Select three.)
145.8.260.7 257.0.122.55 45.22.156.256
In the IP address 192.168.1.52 with the subnet mask 255.255.255.0, which portion represents the network ID?
192.168.1
Which frequencies does Zigbee operate on?
2.4 GHz
Which of the following correctly describe the most common format for expressing IPv6 addresses? (Select two.)
32 numbers, grouped using colons Hexadecimal numbers
While working on a Windows workstation, you enable Remote Desktop.
3389
You are a junior network technician for a small consulting firm. You have recently learned about IP addressing and run the ipconfig command on your local computer.
52
Which IEEE wireless standards specify transmission speeds up to 54 Mbps? (Select two.)
802.11a 802.11g
A customer is experiencing a sporadic interruption of their Wi-Fi network in one area of their building. A technician investigates and discovers signal interference caused by a microwave oven. The customer approves replacing the wireless access point that covers the area, but asks that the wireless speed also be increased.
802.11ac
A clicking noise in your computer has now evolved into a grinding noise. In addition, you are beginning to see frequent error messages while running software, and your computer occasionally freezes. What is the MOST likely cause of these issues?
A failing hard drive
You are working as a junior technician for a small consulting firm. You have been tasked with installing a new computer on the network. You have performed this task and connected the computer to the network.
ARP
Which type of embedded device microprocessor is custom designed to perform a specific function?
ASIC
You have recently purchased a toll pass for a bridge that you cross each day on your way to work.
Active RFID
Which of the following are critical times when memory problems manifest themselves? (Select two.)
After you remove or install hardware Correct Answer: On the first boot of a new computer
After working without problems for a couple of years, your computer has begun to lock up. You suspect that it is a thermal issue, but you can't find any component that is not functioning correctly. You have not replaced the CPU or installed any new devices. The CPU cooling fan and the power supply fan are working properly. The lock-ups are happening with increasing frequency.
An accumulation of dust has gradually built up.
Which of the following are examples of web server platforms? (Select two.)
Apache IIS
Which of the following functions are performed by proxy servers? (Select two.)
Block employees from accessing certain websites. Cache web pages.
Drag each wireless networking technology on the left to its associated transmission distance limitation on the right. Each technology may be used more than once.
Bluetooth Infrared Bluetooth Near Field Communcation
Which of the following proxy server roles stores frequently accesses data so that a user's request never has to leave the network for retrieval?
Caching
A group of workers attend a team-building retreat at a remote cabin. They can place calls on their mobile smartphones, but the cabin has no wired phone, television, or wired internet connectivity. The workers need to access an internet web page through their laptop computers.
Cellular
Which of the following types of internet connection services allows you to be truly mobile while maintaining your internet connection?
Cellular
Lately, your laptop shuts down before it reaches the 5% set in your Windows Power Scheme. You suspect that the power meter is incorrectly reporting the battery power level.
Charge the battery to 100%.
You are currently running a video editing application on your Windows 11 laptop. The laptop includes both an SSD drive and a traditional hard drive. You run the video application on the hard drive, but you would like to install and run the app from the SSD drive to enhance performance speed. Which of the following should you do to protect the video application and associated data files from drive failure when you move the
Configure an automatic backup to the hard disk drive.
You are currently running a video editing application on your Windows 11 laptop. The laptop includes both an SSD drive and a traditional hard drive. You run the video application on the hard drive, but you would like to install and run the app from the SSD drive to enhance performance speed. Which of the following should you do to protect the video application and associated data files from drive failure when you move them
Configure an automatic backup to the hard disk drive.
Which of the following is the surest way to prevent the loss of important information on your mobile device if it is lost, stolen, destroyed, or there is a natural disaster?
Configure your device to remotely back up important data to the cloud.
Your employer wants a system that guarantees that all components will work together with minimal configuration and setup. Time is of the essence in getting this new system ready.
DCS
A technician is configuring the static TCP/IP settings on a client computer. Which of the following configurations are needed for internet communications? (Select three.)
DNS server address IP address with a subnet mask (IPv4) or subnet prefix length (IPv6) Default gateway address
What is a base-10 numbering system also known as?
Decimal
You have just connected a new computer to your local network. The network uses static IP addressing. You find that the computer can communicate with hosts on the same subnet, but not with hosts on a different subnet. No other computers are having problems.
Default gateway
You are troubleshooting a company cell phone that is overheating.
Determine whether the battery is warped or swollen.
A technician has configured a client computer's network interface with server addresses to which the client will send requests for translating fully qualified domain names (FQDNs) to IP addresses and IP addresses to FQDNs.
Domain Name System (DNS)
Which of the following describes an IPv6 address? (Select two.)
Eight hexadecimal quartets 128-bit address
You are attempting to boot a new system. The boot fails, and the system sounds a beep code.
Either no memory is installed or the memory was not detected.
You are in the process of setting up an Ethernet network for a new building at your company's headquarters. You need to connect the wires from the different Ethernet office wall plates to your network rack.
Ethernet patch panel
You are troubleshooting a malfunctioning LED display on a notebook computer system. As part of your troubleshooting, you attach an external monitor and find that it displays the output from the notebook.
Failed backlight
You are configuring an ADSL connection. Which of the following will be part of the configuration?
Filters or splitters
When you print from your laser printer, the paper contains faint images from previous printouts.
Fluorescent lamp Rubber scraper
As a network administrator for your company, you want to set up a network device that manages traffic leaving and entering your network from the outside.
Forward proxy server
Which of the following are IoT systems that work together to make communication between two endpoints possible? (Select two.)
Gateway system Data storage
You are assisting an employee with rebooting a frozen laptop that does not respond to keystrokes or mouse clicks. Which of the following is the SIMPLEST way to power down the laptop?
Hold down the power button for several seconds.
Which of the following components of a IPv4 address will be unique for each network device?
Host ID
A technician is configuring the static TCP/IP settings on a client computer. Which of the following configurations are needed for internet communications? (Select three.)
IP address with a subnet mask (IPv4) or subnet prefix length (IPv6) DNS server address Default gateway address
You are responsible for managing client workstations for your company. A frantic user calls you one morning exclaiming, "Nothing is working!" Which of the following actions should you perform FIRST?
Identify the problem.
You would like to control internet access based on user, time of day, and websites visited.
Install a proxy server. Allow internet access only through the proxy server.
A user has created a complex spreadsheet on her workstation containing many graphs and charts. She sent the document to an older network laser printer that is shared by everyone in her department.
Install additional memory in the printer.
Which of the following projector issues would MOST likely be caused by poor air flow through dirty vents in the projector?
Intermittent shutdowns
Which of the following all-in-one security appliance (UTM) functions detects intrusions and alerts the network but does not block traffic?
Intrusion detection
Which of the following BEST describes how a switch functions?
It connects multiple cable segments or hosts and forwards data packets to the appropriate host.
Which of the following BEST describes the Edge Technology layer of the IoT architecture?
It includes all the hardware parts in the IoT system.
Your workstation is unable to communicate with any other computer on the network. Which of the following tools should you use to test the network card's abilities to send and receive signals?
Loopback plug
Several of your employees are experiencing limited connectivity issues when trying to access some websites on the internet from their workstations. However, they can access the local company network without any problems. You have already tried using the ip and ipconfig commands to determine that the websites can be reached and that the IP information on the workstations is configured properly. You know that the connection to your internet service provider is working properly as well. What should you do next?
Make sure that the DNS server is functioning properly.
An employee complains that their LCD notebook display has started to go dim intermittently. You suspect the backlight might need to be replaced, but you want verify that the backlight is failing before you replace it. You have already checked the power adapter cord to make sure it is plugged in securely.
Make sure that the dimming isn't being caused by a power saving method that has been configured to conserve notebook power.
You are in the process of configuring a new computer. The motherboard has four memory slots and supports dual-channel memory. You install two memory modules. When you boot the computer, the BIOS recognizes both modules, but the memory is not configured to run in dual-channel mode.
Move the modules to the correct motherboard slots.
Which tool would you use to measure electrical properties, such as voltage, amps, and resistance?
Multimeter
A user pays for a retail purchase by placing a smartphone next to the merchant's reader.
NFC
Which of the following network components is responsible for converting digital data into a signal that can be transmitted?
Network interface
What are the standards called that define how data is formatted and transmitted over a network?
Networking protocols
Which of the following are characteristics of the 802.11g wireless standard? (Select three.)
Operates in the 2.4 GHz range. Backwards compatible with 802.11b devices. Maximum bandwidth of 54 Mbps.
Which of the following protocols do email clients use to download messages from a remote mail server?
POP3
You are troubleshooting a malfunctioning laptop computer. Nothing appears on the LED display when the system is powered on.
Plug in an external monitor.
Currently, your company is in the process of upgrading security in the company headquarters building by installing biometric sensors to limit access to specific rooms.
PoE+
Currently, your company is in the process of upgrading security in the company headquarters building by installing biometric sensors to limit access to specific rooms. Your network switches are PoE-enabled, which allows biometric sensors to connect to switches without an external power source. Which of the following PoE standards is designed for use with biometric sensors?
PoE+
When playing videos games or watching movies on your workstation, Windows often freezes and requires that you reboot the system in order to continue.
Replace the video card.
Which of the following DHCP scope options will assign a static IP configuration to a device using the device's MAC address?
Reservation
For the past few days, your mobile phone has stopped functioning and does not respond to touchscreen input. A soft reset no longer fixes the problem. Which of the following is the BEST step you can take to fix this problem?
Reset to factory default.
Which device is responsible for forwarding traffic in between networks?
Router
A homeowner's connection to the internet is through an always-on modem that connects to existing telephone wiring and has the same upload and download speeds. The homeowner is able to make analog phone calls over the same wiring at the same time.
SDSL
You've used your Windows workstation to map a drive to a shared folder on a Windows server. Which protocol was used to access the share?
SMB
A healthcare organization provides mobile clinics throughout the world and needs to transfer patients' statistical data to a central database via the internet.
Satellite
You recently upgraded a client's older workstation to Windows 11. The client has called to complain that the interface is very slow. For example, after clicking on the Start button, the Start menu slowly appears on the screen.
Set the visual effects for best performance.
Which of the following is the FIRST thing you should do if your laptop battery appears swollen or feels hot?
Shut off the laptop and unplug it.
Which of the following BEST describes the purpose for which loopback plugs are used?
Testing ports by returning output signals as input.
Your laptop's LCD screen is beginning to flicker and dim. You have checked the brightness setting to make sure that it is configured correctly.
The LCD screen inverter is failing.
Your company's graphic designers were given laptop computers several months ago. The laptops have a 500-GB SSD drive for the operating system and applications and a 1-TB hard drive for storing media files. Now, a few of the graphic designers are complaining about slow performance on their SSD drives.
The designers are storing media files on the SSD drive.
You are a network administrator troubleshooting a network printer that is frequently experiencing paper jams. You have checked the paper tray and confirmed that the paper is not curled, wrinkled, dusty, wet, torn, or folded. The paper stack does not exceed the limit nor is above the arrow on the edge guide.
The feed rollers and the tray alignment guide
Oliver, a user in your company, is using an Inkjet printer. After using this printer for several months, he notices that streaks are beginning to appear on his printed pages. Oliver has asked you to fix this issue. Which of the following is MOST likely causing Oliver's printer to malfunction?
The printer's heads are out of position and need to be aligned.
You are installing a satellite connection so that your home office can connect to the internet. Which of the following statements is true?
The satellite dish must be pointed in the correct direction to communicate properly.
You are an IT technician for your company. One of your employees calls and tells you that every time they turn their computer on, they hear three beeps. Which of the following BEST describes the information you should relay to this employee about the beeping?
Three repeated beeps may mean different things. They need to reference the motherboard documentation.
A user hibernates a laptop after giving a video presentation. Now, when the system resumes, the display flickers for a moment, but remains blank. You suspect a bad graphics processing unit (GPU). Which of the following troubleshooting steps should you completed? (Select two.)
Toggle the dual display function key. Connect an external display device.
You need to trace the route that a Cat 6 UTP cable takes through the ceiling and walls of your building. Which tool should you use?
Tone generator
A maintenance worker accidently nicks a bundle of network cables routed to multiple wall jacks in a conference room. Only one of the cable's wires are severed. A technician is tasked with replacing the cable.
Tone generator and probe
A maintenance worker accidently nicks a bundle of network cables routed to multiple wall jacks in a conference room. Only one of the cable's wires are severed. A technician is tasked with replacing the cable. Which of the following tools would the technician MOST likely use to identify which wall jack connects to the severed cable?
Tone generator and probe
You are working as a junior security technician for a consulting firm. One of your clients is upgrading their network infrastructure. The client needs a new firewall and intrusion prevention system installed. They also want to be able to block employees from visiting certain types of websites. The client also needs a VPN.
Unified Threat Management
You are working as a junior security technician for a consulting firm. One of your clients is upgrading their network infrastructure. The client needs a new firewall and intrusion prevention system installed. They also want to be able to block employees from visiting certain types of websites. The client also needs a VPN. Which of the following internet appliances should you install?
Unified Threat Management
Which of the following is an inherent vulnerability of embedded devices?
Unknown environments
Which of the following proxy server roles allows users to connect to the internet anonymously with their data encrypted during transmission?
VPN
A few of your employees have complained that their computers sometimes shut down spontaneously. You have noticed that these employees all work in a part of the building where the air conditioning does not adequately cool the room. These employees also use CPU-intensive programs. You suspect that the spontaneous shutdowns are caused by overheating. Which of the following is the simplest way to monitor the temperature of these computers' CPUs?
View the temperature from within the BIOS.
You are testing a printer that you just installed by using the operator panel on the printer to print a test page. Later, you use the printer properties on your computer to print a test page. Instead of a normal test page, you receive several pages with garbled characters on them.
Wrong printer driver
Which of the following is the root level in www.testout.com.'s fully qualified domain name?
period
