220-1101 Exam Dumps - CompTIA A+ Questions and Answers

The correct answer is B. Serial.

A serial cable is a type of cable that can be used to connect devices that use serial communication, which is a method of sending data one bit at a time over a single wire. Serial cables are often used for console access to network devices, such as routers, switches, firewalls, or servers, when other methods of connection, such as SSH (Secure Shell), are not available or not working.

A DB9 connector is a type of connector that has nine pins and is commonly used for serial cables. DB stands for D-subminiature, which is a family of connectors that have a D-shaped metal shield and different numbers of pins. DB9 connectors are also known as DE-9 connectors, as they belong to the E size category of D-subminiature connectors. DB9 connectors can support various serial standards, such as RS-232, RS-422, or RS-485.

A parallel cable is a type of cable that can be used to connect devices that use parallel communication, which is a method of sending data multiple bits at a time over multiple wires. Parallel cables are often used for connecting printers or scanners to computers, but they are not commonly used for network devices or serial connections.

An optical cable is a type of cable that can be used to transmit data using light signals over fiber-optic strands. Optical cables can offer high-speed, high-bandwidth, and low-interference data transmission over long distances. Optical cables are often used for network communication, such as Ethernet, or audio/video transmission, such as HDMI or TOSLINK.

A USB cable is a type of cable that can be used to connect devices that use the Universal Serial Bus (USB) standard, which is a protocol that allows data and power transmission between devices. USB cables can support various types of devices, such as keyboards, mice, cameras, flash drives, or chargers. USB cables have different versions and connectors, such as USB-A, USB-B, USB-C, or Micro-USB.

Therefore, the only cable that uses a DB9 connector is a serial cable. For more information about cables and connectors, you can refer to the following web search results: [What Is a Serial Cable?], [What Is a Parallel Cable?], [What Is an Optical Cable?], [What Is a USB Cable?].

Comprehensive and Detailed In-Depth Explanation:

If users can access local network resources but not the internet, the most likely culprit is a misconfigured or missing default gateway. The default gateway routes traffic from the local network to external networks (i.e., the internet). If it’s not properly set or was altered during a firewall update, internet traffic won’t be forwarded correctly.

Option A: Static IPs could cause conflict, but wouldn't affect only external access if configured correctly.

Option C: An incorrect subnet mask could isolate devices, but local communication would likely be impacted too.

Option D: VLANs segment networks; while misconfigured VLANs could cause access issues, they’d more likely isolate local traffic as well.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 2.6: Given a scenario, configure and troubleshoot network connectivity.

A USB adapter is a device that can plug into a USB port on a laptop and provide wireless connectivity to a network. A USB adapter can support different wireless standards, such as 802.11a, 802.11b, 802.11g, 802.11n, or 802.11ac. A USB adapter can also support different wireless frequencies, such as 2.4 GHz or 5 GHz.

In this case, the user with an older laptop may not be able to connect to the office network after new access points were installed because the laptop’s built-in wireless card does not support the same wireless standard or frequency as the new access points. For example, if the new access points use 802.11ac and 5 GHz, and the laptop’s wireless card only supports 802.11g and 2.4 GHz, the laptop will not be able to communicate with the access points.

To quickly resolve this issue, the user should connect a new USB adapter that supports the same wireless standard and frequency as the new access points. This way, the user can bypass the laptop’s wireless card and use the USB adapter to connect to the office network wirelessly.

A SIM card is needed for the device to use cellular network services, so without it, the device will be unable to connect to the cloud services when taken off site. MDM (Mobile Device Management) can be used to manage settings and access on a device, but it is not necessary for the device to be able to use cloud services. S/MIME (Secure/Multipurpose Internet Mail Extensions) certificates are used to encrypt and digitally sign emails, and are not related to device connectivity. Bluetooth can be used to connect devices together, but it is not necessary for the device to be able to use cloud services.

The best solution for the developer is D. Sandbox environment.

Client-side virtualization is a technology that allows users to run multiple operating systems and applications on the same device, without affecting the host system or the network1. A sandbox environment is a type of client-side virtualization that creates a secure and isolated space for testing, debugging, or experimenting with code, without risking any damage or interference to the rest of the system2.

A sandbox environment can provide several benefits for the developer, such as23:

•It can simulate different scenarios and conditions for the code, such as different operating systems, browsers, devices, network settings, etc.

•It can protect the code from external threats, such as malware, hackers, or unauthorized access.

•It can prevent the code from affecting other applications or processes on the device or the network, such as consuming resources, causing errors, or leaking data.

•It can allow the developer to easily revert any changes or restore the original state of the system, if something goes wrong.

Therefore, a sandbox environment can provide the best solution for the developer who wants to write code in a setting isolated from other infrastructure to avoid negative impacts of experimental code.

Using a mobile hotspot can quickly establish an internet connection for the remote user. A mobile hotspot uses cellular data to create a Wi-Fi network that the user can connect to, bypassing the need for a physical connection to the ISP. This solution is practical and efficient, especially in situations where the primary internet connection is down, and immediate connectivity is required. Mobile hotspots are widely used for their convenience and the ability to provide internet access almost anywhere cellular service is available, as highlighted in the CompTIA A+ Core 1 (220-1101) Exam Objectives in sections related to networking and mobile devices .

To pair a Bluetooth speaker with a smart device, the user needs to enter the PIN code that is provided by the speaker manufacturer or displayed on the speaker itself. This is a security measure to prevent unauthorized pairing and access. Enabling and configuring MFA, synchronizing data to the cloud, or enabling location services are not required for Bluetooth pairing.

DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses to devices on a network, resolving the issue of an invalid static IP address. Configuring the device to use DHCP allows it to request and receive a valid IP address automatically.

Why Not A (SSH): Secure Shell (SSH) is used for secure remote access, not IP address assignment.

Why Not B (FTP): File Transfer Protocol (FTP) is used for file transfers, not network configuration.

Why Not D (DNS): DNS resolves domain names to IP addresses but doesn’t assign IP addresses.

CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.5, basic networking​.

A captive portal is a web page that requires users to agree to terms and conditions, enter credentials, or provide payment information before accessing a wireless network. Some devices, such as streaming media devices, may not have a web browser or a user interface to interact with the captive portal. One possible solution is to connect to the hotspot on the user’s device, such as a smartphone or a tablet, and use it as a bridge to access the internet through the wireless network. The user’s device can authenticate with the captive portal and share its internet connection with other devices via Wi-Fi, Bluetooth, or USB. Reference: https://partners.comptia.org/docs/default-source/resources/a-core-1-content-guide (page 12)

For laptops, the most common type of RAM used is Small Outline Dual Inline Memory Module (SODIMM) due to its smaller size compared to DIMMs used in desktops. DDR5 is the latest generation of RAM, offering higher speed and efficiency. ECC (Error-Correcting Code) DIMM DDR5 and Registered DIMM DDR5 are typically used in servers and high-end workstations for error correction and stability, not in standard laptops. High latency DDR5 is not a desirable specification for RAM as lower latency is preferred for faster performance.

A network tap (Test Access Point) is a device used for monitoring network traffic. It allows the technician to passively observe the traffic between two network nodes in real-time without introducing latency or affecting the network's performance. By using a network tap, the technician can analyze the data packets flowing through the network to identify if packet loss is occurring, which could be contributing to the slow network traffic in the branch office.

One of the possible causes of a laptop randomly turning off is liquid damage, which can cause short circuits, corrosion, and overheating of the internal components1. Liquid damage can be hard to detect, especially if the laptop has been dried or cleaned after the spill2. However, one of the indicators of liquid damage is the presence of small sticker paper within the device that changes color from red to blue3.

These stickers are called liquid contact indicators (LCIs), and they are designed to show if a device has been exposed to water or other liquids3. LCIs are usually red when dry, but they turn blue or purple when wet3. LCIs are often placed near the ports, battery, keyboard, and motherboard of laptops and other electronic devices3. LCIs can help technicians diagnose liquid damage and determine if the device is covered by warranty or not3.

A VLAN (Virtual Local Area Network) segments a physical network into separate logical networks, enhancing security by isolating traffic.

Why Not A (Minimizes collision domains): VLANs manage broadcast domains, not collision domains.

Why Not B (Provides private access to cloud resources): VLANs operate within a local network, not cloud-specific.

Why Not C (Increases network address space): VLANs do not affect address space.

CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.6, VLAN concepts​.

Comprehensive and Detailed In-Depth Explanation:

A bulging tablet casing is a classic sign of a swollen lithium-ion battery, often caused by age, overheating, or overcharging. This is a dangerous condition, as swollen batteries can rupture or catch fire. It also explains why the tablet only works when plugged in — the battery is no longer holding a charge.

Option A: Power supply issues wouldn’t cause physical bulging.

Option B: A bad charge port wouldn’t cause screen damage or physical distortion.

Option D: A broken screen could cause display issues, but not the bulging chassis.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 1.4: Given a scenario, configure settings and use cases for laptops and mobile devices.

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Lightning is a proprietary connection type that is used by Apple devices, such as iPhones, iPads, and iPods, to transfer data, charge, and connect to accessories. Lightning cables have a reversible 8-pin connector that can be plugged into a USB port on a workstation or a power adapter. USB-C, serial, and NFC are not compatible with Apple phones.

The degraded status on Server 2 indicates a RAID-5 issue, typically due to a failed or failing drive. In RAID-5 configurations, when one drive fails, the system can still operate but with reduced performance as parity data is used to rebuild missing data on-the-fly.

Recommended Replacement Drive:

To minimize performance degradation, the replacement drive should be:

SAS HDD with the same specifications (64KB stripe size, no read-ahead, and write-back policy).

Matching the configuration exactly ensures seamless integration and optimizes recovery speed in the RAID-5 array.

In RAID-5, degraded performance is expected when one drive fails, as parity data needs to rebuild missing information during each read/write process. Replacing the failed drive restores the RAID array to optimal status, reducing the load on existing drives and returning the system to normal read/write performance. The write-back policy and disabled disk cache settings are designed to reduce latency and increase efficiency, essential for handling real-time applications.

A user reports poor performance on the

application server.

INSTRUCTIONS

Click on Server 1 and Server 2 and review

the information presented in each chart to

determine which drives need to be replaced.

Select the appropriate replacement drive

that should be used, for the least

performance degradation to the server.

A computer server with many black boxes Description automatically generated with medium confidence

A screen shot of a computer Description automatically generated

A computer screen shot of a computer Description automatically generated

A computer screen shot of a computer Description automatically generated

A computer screen shot of a computer Description automatically generated

A screenshot of a computer Description automatically generated

A screenshot of a computer Description automatically generated

Comprehensive and Detailed In-Depth Explanation:

Mobile Device Management (MDM) software often controls access to corporate resources based on location, network, or VPN status. If the MDM is not configured to allow access from outside the office or via home networks, the apps may be blocked. This is the most probable cause if apps work only on-premises.

Option A: GPS is used for location services, not access control.

Option C: WPA is a Wi-Fi security protocol, not related to access restrictions.

Option D: NFC enables close-range communication — irrelevant to app access.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 1.6: Given a scenario, configure basic mobile device network connectivity and application support.

Duplex printing allows printing on both sides of a paper, which can significantly reduce paper consumption and costs associated with buying paper. This makes duplex printing the best feature for cutting costs on consumables.

Comprehensive and Detailed In-Depth Explanation:

A sandbox is an isolated virtual environment used to test or run applications securely without risk to the host or network. It prevents the VM from communicating with external systems, making it ideal for testing malware or suspicious software.

Option A (VDI): Virtual Desktop Infrastructure allows network communication; it does not restrict it.

Option B (Private cloud): Refers to a cloud deployment model, not a communication barrier.

Option D (Type 1 hypervisor): Runs VMs directly on hardware and does not inherently block communication.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 4.1: Compare and contrast cloud computing concepts.

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