[Nov-2025] The Best A+ Study Guide for the 220-1101 Exam [Q56-Q78]

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[Nov-2025] The Best A+ Study Guide for the 220-1101 Exam

220-1101 certification guide Q&A from Training Expert ExamBoosts

Preparing for the CompTIA 220-1101 certification exam requires a combination of hands-on experience, study materials, and practice exams. Candidates can take advantage of various study resources, including online courses, practice exams, study guides, and videos, to prepare for the exam. Candidates should also have hands-on experience with technology as this will help them understand the exam topics better.

NO.56 A customer has contacted you about building two new desktops. The first desktop will be a gaming workstation. The customer requirements include:
Playing the newest games at a high frame rate
Fast game load times
Enough storage to have several games installed at once
High-end audio
No concern about cost
Running the current Windows OS
The second workstation will be a family workstation. The requirements include:
Capability for word processing, videoconferencing, and basic web surfing Minimal cost, as long as it meets the requirements Running the current Windows OS

解释：

NO.57 A user on a SOHO network is unable to watch online videos, even at 240 pixels. The technician runs ipconfig from the user’s computer and records the following:

The technician then connects a test laptop to the router via the user’s Cat 5 cable and records the following information:

Which of the following is MOST likely causing the user’s issue?

Incorrect IP address

Faulty NIC

Misconfigured default gateway

Bad network cable

NO.58 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?

IPv4 address

Subnet mask

DHCP server

Default gateway

说明
The correct answer is D. Default gateway.
A default gateway is the device that connects a local network to other networks, such as the internet. A default gateway is usually a router or a modem that has an IP address on the same subnet as the local network. A default gateway is necessary for a device to communicate with devices outside its local network.
In this case, the user has a self-configured, static IP address of 192.168.1.20, which belongs to the subnet
192.168.1.0/24 (with a subnet mask of 255.255.255.0). However, the default gateway is set to 192.168.0.1, which belongs to a different subnet (192.168.0.0/24). This means that the user’s device cannot reach the default gateway, and therefore cannot connect to the internet.
The technician should edit the default gateway to match the correct subnet of the user’s device, such as
192.168.1.1 or 192.168.1.254, depending on the configuration of the network.
Reference: CompTIA A+ Core 1 Sample Questions and Study Guide

第 59 号 A technician is working with a user to set up scanning. The user requires the scans to be viewable on the network for the entire department. Which of the following settings on the MFP should the technician edit to BEST address the user’s request?

Scan to email

Server message block

Secured prints

Web services

Printer share

Server message block (SMB) is the setting on the multifunction printer (MFP) that the technician should edit to best address the user’s request of making the scans viewable on the network for the entire department. SMB is a network protocol that allows file sharing and printer access among different devices on a network. The technician can configure the MFP to scan to a shared folder on the network using SMB. Scan to email is a feature that allows the MFP to send scanned documents as email attachments, which may not be viewable by everyone in the department. Secured prints is a feature that allows the MFP to print documents only after entering a PIN or password, which does not address the user’s request. Web services is a feature that allows the MFP to access online services such as cloud storage or email, which may not be viewable by everyone in the department either. Printer share is not a setting on the MFP, but a feature that allows a device to share its printer with other devices on a network

NO.60 The Wi-Fi network in the office is experiencing slow connection speeds. Which of the following should the technician check first on the access point?

Transmit power settings

Security settings

Firmware version

地点

说明
The transmit power settings of the access point determine how strong the Wi-Fi signal is. If the transmit power is too low, the Wi-Fi network will have slow connection speeds and poor coverage. If the transmit power is too high, the Wi-Fi network will interfere with other nearby networks and devices, causing congestion and performance issues. Therefore, the technician should check the transmit power settings first and adjust them to an optimal level for the office environment.
参考资料
*8 Reasons Why Your Internet is Slow (and How to Fix It), section “You have weak Wi-Fi signals”.
*6 Things Slowing Down Your Wi-Fi (And What to Do About Them) – How-To Geek, section “Channel Congestion Dings Wi-Fi Performance”.

第 61 号 A help desk technician thinks a desktop PC has failed due to a defective power supply Which of the following steps should the technician take next?

Inquire about environmental or infrastructure changes.

Conduct external or internal research based on symptoms.

Establish a plan of action to resolve the problem and implement the solution.

Document the findings, actions, and outcomes.

According to the CompTIA troubleshooting methodology, the next step after establishing a theory of probable cause is to test the theory to determine the cause. However, before testing the theory, the technician may need to conduct some research based on the symptoms and the possible cause. This may involve consulting online resources, manuals, documentation, or colleagues to find out more information about the power supply and how to test it. Research can help the technician confirm or eliminate the theory and avoid unnecessary actions or damage.
Answer A is incorrect because inquiring about environmental or infrastructure changes is part of identifying the problem, which is the first step of the troubleshooting methodology. The technician should have already done this before establishing a theory of probable cause.
Answer C is incorrect because establishing a plan of action to resolve the problem and implement the solution is the fourth step of the troubleshooting methodology. The technician should not jump to this step without testing the theory and verifying the cause.
Answer D is incorrect because documenting the findings, actions, and outcomes is the last step of the troubleshooting methodology. The technician should not do this until the problem is resolved and verified.

第 62 号 While implementing a non-carrier-grade wireless backhaul, a technician notices the current channel selection is extremely polluted with various RF signals. Upon performing a spectral analysis, the technician discovers a channel containing almost no RF pollution. Unfortunately, the technician is unable to select that channel.
Which of the following is the MOST likely reason for this issue?

The channel is reserved for licensed band use.

The channel selection is defective; contact the manufacturer.

The channel must be unlocked by the vendor.

The device requires a firmware update to unlock the channel.

说明
The most likely reason that the technician is unable to select the channel with almost no RF pollution is that it is reserved for licensed band use. Some channels are reserved for specific purposes and require a license to use. These licensed bands are typically used for critical infrastructure, public safety, or military operations, and unlicensed devices are not allowed to use them. References: CompTIA A+ Certification Exam Objectives –
220-1001: 3.3 Compare and contrast common networking hardware devices.

NO.63 Which of the following allows a switch to be divided into separate logical networks?

VLAN

SSL VPN

NAT

RADIUS

A Virtual LAN (VLAN) is a network topology that allows a switch to be divided into separate logical networks. This allows for the creation of multiple broadcast domains within a single physical network, improving network segmentation and security. With VLANs, you can segment your network so that different departments, applications, or users are isolated from each other, improving network security and performance.

NO.64 A technician attempts to join a Windows client to a domain but receives the following error:
An attempt to resolve the hostname has failed.
The technician generates the display shown below utilizing ipconfig /all.

Which of the following is the most likely reason for the error?

DNS

Physical address

Subnet mask

IPv4 address

Default gateway

The most likely reason for the error is that the DNS server is not configured correctly. The technician should check the DNS server settings and make sure they are correct.
DNS, or Domain Name System, is a service that translates domain names, such as www.example.com, into IP addresses, such as 192.168.1.1, that computers use to communicate with each other. DNS is essential for joining a Windows client to a domain, which is a logical group of computers that share a common directory and security policy. A domain name, such as example.com, identifies the domain and its members on the network.
To join a Windows client to a domain, the client needs to resolve the hostname of the domain controller, which is the server that manages the domain and its resources. The client sends a DNS query to the DNS server, asking for the IP address of the domain controller. The DNS server responds with the IP address, and the client uses it to establish a connection with the domain controller and complete the domain join process.
However, if the DNS server is not configured correctly, the client may not be able to resolve the hostname of the domain controller, and receive the error: An attempt to resolve the hostname has failed. This can happen if the DNS server is not reachable, not authoritative, or not updated. For example, the DNS server may have an incorrect IP address, a wrong DNS suffix, a missing or outdated DNS record, or a firewall blocking the DNS traffic.
To fix the error, the technician should verify that the DNS server settings on the client and the domain controller are correct and consistent. The technician can use the ipconfig /all command to display the DNS server settings, such as the IPv4 address, the subnet mask, the default gateway, and the DNS suffix. The technician can also use the nslookup command to test the DNS resolution and the ping command to test the connectivity. The technician should make sure that the client and the domain controller are using the same DNS server, and that the DNS server can resolve the hostname of the domain controller.
参考资料
* How to Resolve the “Temporary failure in name resolution” Error1
* Strict hostname resolution configured but no hostname was set2
* Error: Hostname Not Resolved to an IP Address – HostGator3
* The Host Name Could Not be Resolved in DNS4
* Troubleshoot DNS name resolution on the Internet – Windows Server5

第 65 号 Which of the following network devices is needed to direct packets to networks outside of the LAN?

Hub

Switch

路由器

Bridge

说明
A router is a network device that connects multiple networks together and directs data packets to their intended destinations. This includes directing packets to networks outside of the local area network (LAN). Routers use routing tables to determine the best path for data packets to travel.
Hubs and switches operate within a single LAN and are not capable of routing packets to external networks.
Bridges can connect two LANs together, but they do not have the intelligence to route packets to external networks.
Therefore, only routers are capable of directing packets to networks outside of the LAN.
参考资料
CompTIA A+ Certification Core 1 220-1101 Study Guide, Chapter 4: Networking, Section 4.1 Networking Fundamentals

NO.66 A natural disaster occurred, and the storage system for the development team is unrecoverable. The technician is preparing replacement storage arrays that include a hypervisor with the capacity to support several virtual machines. Two separate bays are available, and both should be utilized.
Requirements for the primary array include the following:
* No need to be scalable
* Very fast on reads
* Fault tolerance of one drive
* Ability to function with only one drive
* Easily recoverable data
* High redundancy
* Minimum number of drives
Requirements for the secondary array include the following:
* Fault tolerance of one drive
* Total space of 600G3
* Best write performance
* Minimum number of drives
Instructions:
Drag and Drop the appropriate Hard Drives. Then Open each array to complete the configuration.

解释：
Primary Array:
* Drag and drop two 120 GB SSD hard drives to the primary array bay.
* Open the primary array and select RAID 1 as the RAID level. RAID 1 provides fault tolerance of one drive, ability to function with only one drive, easily recoverable data, high redundancy, and very fast on reads. It also does not need to be scalable and uses the minimum number of drives (two) for RAID 1.
* Confirm the configuration and close the primary array.
Secondary Array:
* Drag and drop two 300 GB SSD hard drives to the secondary array bay.
* Open the secondary array and select RAID 0 as the RAID level. RAID 0 provides the best write performance and uses the minimum number of drives (two) for RAID 0. It also provides a total space of
600 GB (300 GB x 2), which meets the requirement.
* Confirm the configuration and close the secondary array.
You have completed the configuration of the storage arrays.

NO.67 Which of the following technologies can be used to connect a home PC to a company’s network?

VLAN

虚拟专用网

VoIP

A VPN (Virtual Private Network) is the technology that allows a home PC to connect securely to a company’s network over the internet. It extends a private network across a public network, enabling users to send and receive data as if their computing devices were directly connected to the private network. This makes VPNs ideal for remote work and accessing company resources securely from a home PC.

NO.68 以下哪种标准支持 MIMO 技术？

802.11a

802.11b

802.11g

802.11n

The 802.11n wireless networking standard supports Multiple Input Multiple Output (MIMO) technology. MIMO technology uses multiple antennas on both the transmitting and receiving devices to improve wireless performance by increasing the amount of data that can be transmitted simultaneously. 802.11a, 802.11b, and 802.11g do not support MIMO technology. Reference: CompTIA A+ Certification Exam: Core 1 – Objective 3.3

第 69 号 A user indicates that a laptop is not performing well. A technician determines the laptop has a conventional HDD and that installing a SSD will improve the laptop’s performance. Which of the following lists of steps describes what the technician should do to complete the upgrade with the LEAST amount of downtime?

1. Remove the HDD and install the SSD in the laptop.
2. Install the operating system and necessary applications on the SSD.
3. Connect the HDD to the laptop using a USB enclosure.
4. Copy over all of the user’s data.

1. Leave the HDD in place.
2. Install the SSD in an empty drive bay.
3. Leave all data intact on the HDD.
4. Confirm the SSD is accessible in the operating system.

1. Connect the SSD to the laptop using a USB enclosure.
2. Clone the HDD to the SSD using cloning software.
3. Remove the HDD.
4. Install the SSD.

1. Remove the HDD and install the SSD in the laptop.
2. Install the operating system and necessary applications on the SSD.
3. Install the HDD in a USB enclosure.
4. Provide the external HDD for the user to access the old data.

说明
The best way to complete the upgrade with the least amount of downtime is to clone the HDD to the SSD using cloning software, and then replace the HDD with the SSD. This way, the user does not have to reinstall the operating system and applications, or copy over their data manually. The other options would either take more time or result in data loss or inaccessibility. Verified References: [How to Upgrade Your Laptop’s Hard Drive to an SSD].

NO.70 Which of the following concepts would be used by an online retailer to quickly add more web servers during peak sales times?

Community cloud

Rapid elasticity

High availability

Metered service

第 71 号 A company has a dot matrix printer that uses carbon paper. The company reports that the first page is printing too light, although the following pages are still legible. Which of the following MOST likely needs to be fixed?

The print drum is worn and loose causing the printing to be light in places

The ribbon is low on ink or missing and must be replaced to get proper output

The heating element has failed, and a new one needs to be installed for proper transfer

The wrong type of filement is loaded, preventing it from sticking correctly

The fuser assembly is not calibrated properly, causing it to impact the paper too hard

Lines in dot matrix printer output indicate a stuck pin in the print head. Output can also be affected by the platen position. The platen adjusts the gap between the paper and the print head to accommodate different paper types. Incorrect adjustment of the platen gap can cause faint printing (gap too wide) or smudging (too narrow).

第 72 号 A technician is installing a wireless access point and is required to run all cabling and make patch cords if necessary.
INSTRUCTIONS
Part 1
For each cable type, click the (+) to select the appropriate connector and tool.
part 2
An access point was moved and no longer has connectivity. Connect the access point, patch panel, and switch by clicking the (+) to select the appropriate cable end for each corresponding location to create a link.
The link will be visible after making the second selection of each pair.
Cable ends may be used multiple times, and all placeholders will be filled.

See the solution below in Explanation.
解释：
Check the exhibit diagram for both parts.

Part 2

第 73 号 A small ISP has hired a new technician Joe, the new technician, is being trained to configure customers* home networks The trailing instructor gives me technician a starter kit with cables, cable ends, and other network equipment and asks mm to build a working network.
The computer should be connected to have internet connectivity and the phone should be connected to have a dial tone.
INSTRUCTIONS
Use the appropriate cables. cable ends, tools and equipment to configure the network ana connect an components accordingly There are 3 steps and the simulation starts on step 1.

See theanswer below in explanation part
Answer of both steps below.

第 74 号 A user in a home office is unable to connect to the internet. A technician asks the user to run the ipconfig command. Which of the following first octets immediately suggests an issue with the IP address?

169

172

192

An IP address starting with the first octet “169” immediately suggests an issue, indicating that the device has been assigned an Automatic Private IP Address (APIPA). APIPA addresses are self- assigned by a computer or device when it’s unable to obtain an IP address from a DHCP server, which is common in situations where the device is unable to connect to the network or the DHCP server is not functioning properly. The range for APIPA addresses is 169.254.0.1 to
169.254.255.254, and seeing an IP address within this range is a clear indicator of connectivity issues related to DHCP.

第 75 号 Which of the following devices is capable of dynamically distributing an IP address?

Hub

Switch

Injector

路由器

说明
A router is a device that can dynamically distribute an IP address to the devices connected to its network using a protocol called DHCP (Dynamic Host Configuration Protocol). DHCP allows a router to automatically assign an IP address and other network configuration information to a device when it joins the network, without requiring manual intervention from the administrator. A router can also act as a gateway between different networks, such as a local area network (LAN) and the internet1.
A hub is a device that connects multiple devices on a network and forwards data packets between them.
However, a hub does not assign IP addresses or perform any routing functions. A hub operates at the physical layer of the OSI model and does not understand IP addresses or other network protocols.
A switch is a device that connects multiple devices on a network and forwards data packets between them based on their MAC addresses. A switch can improve the performance and security of a network by reducing collisions and isolating traffic. However, a switch does not assign IP addresses or perform any routing functions. A switch operates at the data link layer of the OSI model and does not understand IP addresses or other network protocols.
An injector is a device that provides power to another device over an Ethernet cable, such as a wireless access point or a security camera. This is also known as Power over Ethernet (PoE). An injector does not assign IP addresses or perform any routing functions. An injector operates at the physical layer of the OSI model and does not understand IP addresses or other network protocols.

NO.76 Which of the following special function keys is MOST likely to be used when configuring a laptop for a presentation?

External display

Screen orientation

Media options

Screen brightness

第 77 号 A user connects a laptop to a conference room audiovisual system using a VGA cable. The TV displays the image correctly, but the audio is not working. Which of the following will most likely resolve the issue?

Replacing the VGA cable

Switching inputs

Using HDMI to connect

Restarting the audiovisual system

VGA (Video Graphics Array) cables transmit analog video signals only and do not carry audio signals. When a user connects a laptop to an audiovisual system using a VGA cable, the lack of audio is due to VGA’s inability to transmit sound. Switching to an HDMI (High-Definition Multimedia Interface) cable, which supports both audio and video signals, will most likely resolve the issue by enabling the transmission of sound to the audiovisual system alongside the video.
参考资料
CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically sections related to peripherals and connectors, which would cover the capabilities of different types of cables and connectors, including VGA and HDMI.
Basic understanding of the functionality of common video and audio cables and connectors, emphasizing the distinction between VGA cables, which only support video signals, and HDMI cables, which support both video and audio signals.

第 78 号 A user attempts to connect a laptop to a projector but receives the following message from the projector: Out of Range. Which of the following needs to be addressed first?

Change the resolution settings.

Check the video cable and replace it if necessary.

Set the computer’s display settings to extend/duplicate.

Verify that the laptop video card driver is the most up-to-date version.

说明
The most likely answer is A. Change the resolution settings.
The error “Out of Range” normally means that the resolution being output by the computer is not compatible with the projector. The resolution is the number of pixels that are displayed on the screen. If the resolution is too high for the projector, it may not be able to display the image correctly or at all12.
To resolve this issue, you should try lowering the resolution settings on your laptop to match the native resolution of the projector or a lower one. You can do this by following these steps1:
*Right-click on an empty area of your desktop and select Display settings.
*Under Scale and layout, click on Display resolution and choose a lower option from the drop-down menu.
*Click Apply and then Keep changes.
*Reconnect your laptop to the projector and check if the image is displayed properly.
If changing the resolution settings does not help, you may need to check other factors, such as the video cable, the display settings, or the video card driver. However, these are less likely to cause the “Out of Range” error than the resolution settings.

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CompTIA 220-1101, also known as the CompTIA A+ Certification Exam: Core 1, is a certification exam designed for individuals who want to pursue a career in the IT industry. 220-1101 exam covers a wide range of topics related to computer hardware, software, networking, and security. It is the first of two exams required to obtain the CompTIA A+ certification, which is a well-respected industry credential that validates an individual’s knowledge and skills in computer technology.

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