CompTIA 220-1101 Online Practice Questions and Exam Preparation

CompTIA 220-1101 Online Questions & Answers

• Question 321:

  After a required operating system upgrade on a mobile deuce, a user's external monitor no longer works. Which of the following should a technician do to fix this issue?

  A. Install the latest graphics drivers.
  B. Replace the monitor
  C. Restore the operating system to the previous version.
  D. Reseat the external video adapter.
  A. Install the latest graphics drivers.

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  Explanation

  The correct answer is A. Install the latest graphics drivers. The most likely cause of the external monitor not working after an operating system upgrade is that the graphics drivers are incompatible with the new version. Installing the latest graphics drivers from the manufacturer's website or using Windows Update can resolve this issue. Replacing the monitor, restoring the operating system to the previous version, or reseating the external video adapter are not effective solutions for this problem.

  References: You can find more information about troubleshooting external monitor connections in Windows 101 and Windows 112. You can also learn how to update the display driver using Device Manager2.

• Question 322:

  A user with a self-configured, static IP address cannot connect to the internet. The technician runs an ipconfig command and receives the following output: Which of the following should the technician edit?

  

  A. IPv4 address
  B. Subnet mask
  C. DHCP server
  D. Default gateway
  B. Subnet mask

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  Explanation

• Question 323:

  Which of the following is an email authentication method designed to detect email spoofing by attaching a digital signature to outgoing email?

  A. SPF
  B. DKIM
  C. DNS pointer
  D. MX records
  B. DKIM

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  Explanation

  DKIM (DomainKeys Identified Mail) is an email authentication method that attaches a digital signature to outgoing emails to verify the email's authenticity and detect email spoofing.

  SPF (Sender Policy Framework): Specifies which mail servers are authorized to send emails for a domain but does not involve digital signatures.

  DNS Pointer (PTR): Used for reverse DNS lookups, not email authentication.

  MX Records: Specify mail servers for email delivery but do not authenticate emails.

  Core 2 (220-1102), Section 2.4, email security and authentication.

• Question 324:

  A new HD webcam's image only updates one or two times per second. The specifications indicate the webcam is capable of updating 30 frames per second.

  Which of the following is MOST likely causing the issue?

  A. The USB 2.0 port has insufficient bandwidth.
  B. The Thunderbolt connector is not compatible.
  C. The VGA cable does not support a digital signal.
  D. The connection should -- instead of STP.
  A. The USB 2.0 port has insufficient bandwidth.

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  Explanation

  The USB 2.0 port has insufficient bandwidth to support a high-definition webcam that can update 30 frames per second. USB 2.0 has a maximum theoretical bandwidth of 480 Mbps, which may not be enough for HD video streaming. The user should try using a USB 3.0 port or a Thunderbolt connector, which have higher bandwidths and can support HD webcams. The Thunderbolt connector is compatible with USB devices, so it is not the cause of the issue. The VGA cable and the STP cable are not related to the webcam, as they are used for video output and network connection respectively.

• Question 325:

  A technician is troubleshooting Wi-Fi connection issues on a customer's laptop. The laptop connects but intermittently disconnects. The technician has already confirmed the wireless card is properly installed, the router settings are correct, and the wireless signal strength is normal. Which of the following should the technician investigate next?

  A. Firewall settings
  B. MAC address filter
  C. Number of connected devices
  D. Radio frequency
  D. Radio frequency

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  Explanation

  The next thing that the technician should investigate is

  D. Radio frequency. Radio frequency is the range of electromagnetic waves that are used to transmit wireless signals. Different devices and networks use different radio frequencies, such as 2.4 GHz or 5 GHz, to communicate with each other. If there are multiple devices or networks using the same or overlapping radio frequencies, they can interfere with each other and cause Wi-Fi connection issues, such as intermittent disconnections, slow speeds, or poor quality . To fix this issue, the technician can try changing the radio frequency or channel of the router or the laptop, to avoid interference from other sources. The technician can also use a tool such as Wi-Fi Analyzer to scan the nearby wireless networks and find the best frequency or channel to use. Alternatively, the technician can move the router or the laptop to a different location, away from potential sources of interference, such as cordless phones, microwaves, Bluetooth devices, or other routers . The other options are less likely to be the reason for the issue. Firewall settings are software configurations that control the network traffic and security of a device. They may block some websites or applications from accessing the internet, but they should not affect the Wi-Fi connection itself. MAC address filter is a feature that allows the router to restrict access to specific devices based on their MAC addresses, which are unique identifiers for network interfaces. If the MAC address filter is enabled and the laptop's MAC address is not on the allowed list, it will not be able to connect to the Wi-Fi network at all, not intermittently. Number of connected devices is the amount of devices that are using the same Wi-Fi network at the same time. This may affect the network performance or bandwidth, but it should not cause intermittent disconnections, unless the network is overloaded or unstable.

  References: How To Fix WiFi Connection Problems - Help Desk Geek How to Fix Your WiFi Connection Problems - Lifewire Wi-Fi Analyzer - Apps on Google Play

• Question 326:

  An analyst asks a technician to recommend a solution for a customer in the software development industry, where the customer can test a variety of OS's running the various applications that the customer produces. The customer wants to minimize the investment in hardware.

  Which of the following solutions should the technician recommended to BEST meet the customer's requirement?

  A. Purchase a number of low-cost devices, installing the required Oss and applications on each one. Use separate machines for each testing environment.
  B. Purchase a high-end system meeting the hardware requirements for all of the individual Oss and applications. Configure a VM for each testing environment.
  C. Purchase one computer and create images for each computer configuration and OS. Re-image the machine for each testing environment.
  D. Purchase a number of computers, installing a VM on each one. Configure each VM with an OS for the testing environment.
  B. Purchase a high-end system meeting the hardware requirements for all of the individual Oss and applications. Configure a VM for each testing environment.

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  Explanation

• Question 327:

  A network administrator is troubleshooting a connectivity issue. The administrator performs a port scan, and the following information is generated:

  

  Which of the following standard ports should be open to allow a successful RDP connection?

  A. 53
  B. 443
  C. 445
  D. 3389
  D. 3389

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  Explanation

• Question 328:

  A company uses legacy accounting software, and no replacement is available. Which of the following virtualization solutions will the company MOST likely select?

  A. Network
  B. Storage
  C. Desktop
  D. Sandbox
  C. Desktop

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  Explanation

  Desktop virtualization allows multiple virtual desktop instances to run on a single physical computer. This can be a suitable solution for a company using legacy accounting software that may not be compatible with modern operating systems or hardware. By virtualizing the desktop environment, the company can continue to run the legacy software on a virtual machine while maintaining compatibility and isolation from the host system. It provides a way to extend the life of the legacy software without having to find a replacement or upgrade the underlying hardware and operating system.

• Question 329:

  A user on the marketing team uses various multimedia applications that consume a lot of memory. The user needs to install more RAM to run these applications effectively. When the user opens the computer case, the user sees four slots in two sets of colors. Which of the following memory types is MOST likely required?

  A. Dual-channel
  B. Triple-channel
  C. Single-channel
  D. Quad-channel
  E. Error correction code RAM
  A. Dual-channel

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  Explanation

  The two sets of colors on the motherboard indicate that it supports dual- channel memory, which doubles the bandwidth available to the memory controller. Dual- channel memory requires two identical memory modules to be installed in pairs in the correct slots to work effectively. In this case, the user can install two identical RAM modules to enable dual-channel memory, which will provide better performance when using multimedia applications that consume a lot of memory.

• Question 330:

  Which of the following network options would work BEST to ensure a client-side virtual machine cannot access the rest of the network?

  A. NAT mode
  B. Bridge mode
  C. Direct mode
  D. Host-only mode
  D. Host-only mode

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  Explanation

  Host-only mode is a network option that isolates a client-side virtual machine from the rest of the network. It allows the virtual machine to communicate only with the host machine and other virtual machines on the same host. NAT mode allows the virtual machine to share the host's IP address and access the network through it. Bridge mode allows the virtual machine to have its own IP address and connect directly to the network. Direct mode is not a valid network option for virtual machines.