CompTIA 220-1101 Practice Test - Questions Answers, Page 51

The first step in troubleshooting any network issue is to identify the problem and gather information from the user and the device. Reviewing the network settings in the OS can help the technician verify if the laptop is configured correctly to connect to the wireless network, such as the SSID, security type, password, IP address, DNS server, etc. This can also help the technician rule out any software or driver issues that might prevent the laptop from connecting to the network. This is a logical and simple step that can be done before attempting any other actions that might affect the network infrastructure or other devices.

CompTIA A+ 220-1101 -- 5.1 - How to Troubleshoot

CompTIA A+ Core 1: Troubleshooting Wired & Wireless Networks

CompTIA A+ Core 1 (220-1101) Certification Study Guide

DNS stands for Domain Name System, and it is a network service that translates human-readable names (such as www.google.com) into numerical IP addresses (such as 172.217.14.206) that identify the location of the web servers on the internet. DNS also allows reverse lookup, which means finding the domain name associated with a given IP address.DNS servers are responsible for maintaining a database of domain names and their corresponding IP addresses, and responding to queries from clients who want to resolve a name to an address or vice versa12.

DHCP stands for Dynamic Host Configuration Protocol, and it is a network service that automatically assigns IP addresses and other network configuration parameters (such as subnet mask, default gateway, DNS server, etc.) to devices that join a network. DHCP servers are responsible for managing a pool of IP addresses and leasing them to clients for a specified duration.DHCP servers also renew or release the IP addresses when the lease expires or the client disconnects from the network34.

The difference between DNS and DHCP is that DNS is used for address translation, which means converting domain names to IP addresses and vice versa, while DHCP is used for IP address assignment, which means providing IP addresses and other network settings to devices that need to communicate on a network.

DNS Configuration -- CompTIA A+ 220-1101 -- 2.6

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Courses for CompTIA A+: 220-1101: CompTIA A+ (Core 1) - Skillsoft

A crimper is a tool that is used to attach connectors to network cables, such as RJ-45 or RJ-11. A technician might need a crimper to create a longer cable for the router access point or to replace a damaged connector.

A Wi-Fi analyzer is a software or hardware tool that can scan and measure the wireless signal strength, interference, channel usage, and security of a Wi-Fi network. A technician might need a Wi-Fi analyzer to find the optimal location and configuration for the router access point to improve the signal coverage for the SOHO client.

Reference

* [CompTIA A+ Core 1 (220-1001) Certification Study Guide], page 77

* [CompTIA A+ Core 1 (220-1001) Certification Study Guide], page 82

* [What is a Crimper?]

* [What is a Wi-Fi Analyzer?]

DHCP (Dynamic Host Configuration Protocol) is a network service that automatically assigns IP addresses and other configuration parameters to devices that request them. DHCP simplifies the management of IP addresses and avoids conflicts and errors67. An APIPA (Automatic Private IP Addressing) is a feature of Windows that assigns a default IP address in the range of 169.254.x.x to a device when it cannot obtain a valid IP address from a DHCP server. An APIPA indicates that there is a problem with the DHCP service or the network connectivity between the device and the DHCP server89. Therefore, the technician should investigate the DHCP service first to check if it is running, configured correctly, and has enough available IP addresses to assign. The other services are not directly related to the IP address assignment. RADIUS (Remote Authentication Dial-In User Service) is a protocol that provides centralized authentication, authorization, and accounting for network access10. AAA (Authentication, Authorization, and Accounting) is a framework that controls the access and usage of network resources11. DNS (Domain Name System) is a service that resolves domain names into IP addresses12.

Reference

6: What is DHCP (Dynamic Host Configuration Protocol)? - Definition from WhatIs.com

7: How DHCP works - Windows Server | Microsoft Docs

8: What is APIPA (Automatic Private IP Addressing)? - Definition from WhatIs.com

9: How to Fix an IP Address Conflict

10: What is RADIUS (Remote Authentication Dial-In User Service)? - Definition from WhatIs.com

11: What is AAA (authentication, authorization, and accounting)? - Definition from WhatIs.com

12: What is DNS (Domain Name System)? - Definition from WhatIs.com

An overheated CPU is the most likely cause of a computer that has been randomly shutting down without warning. A CPU generates heat when it performs calculations, and if the heat is not dissipated properly, it can damage the CPU or cause it to malfunction. A computer that shuts down randomly is a common symptom of an overheated CPU, as the system tries to protect itself from further damage by shutting down or restarting.

The other options are not as likely to cause this issue. A corrupted OS may cause the computer to crash, display errors, or fail to boot, but it does not affect the CPU temperature or the system fan. Incompatible memory modules may cause the computer to beep, display a blue screen, or fail to recognize the installed RAM, but they do not cause the CPU to overheat or the system to shut down randomly. Low system resources may cause the computer to slow down, freeze, or display a low memory warning, but they do not affect the CPU temperature or the system fan.

To troubleshoot and resolve an overheated CPU issue, the user should check and clean the air vents, provide proper ventilation, apply thermal paste, replace the fan or the heat sink, or upgrade the CPU if necessary. The user should also update the BIOS and the device drivers, adjust the power settings, and monitor the system temperature using diagnostic tools.

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DDR5 SDRAM (Double Data Rate 5 Synchronous Dynamic Random-Access Memory) is the latest and fastest type of RAM for desktop workstations as of 2023. DDR5 SDRAM offers higher speeds, lower power consumption, greater capacity, and improved reliability than previous generations of DDR SDRAM. DDR5 SDRAM can operate at frequencies up to 8400 MHz, compared to 3200 MHz for DDR4 SDRAM, which means it can transfer data faster and more efficiently. DDR5 SDRAM also supports dual-channel memory, which allows two memory modules to work together and double the bandwidth. DDR5 SDRAM is compatible with the latest Intel and AMD processors that support the DDR5 standard.

The other options are not as fast or suitable for a desktop workstation. DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM are older and slower types of RAM that have lower frequencies, higher voltages, and lower capacities than DDR5 SDRAM. DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM are not compatible with the latest processors that support DDR5 SDRAM, and require different motherboards and slots. DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM are more suitable for older or budget systems that do not require high performance or memory-intensive applications.

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Virtualizing the application is the best action that a technician can take to complete the OS migration when there is no compatible current software for a specialized hardware device. Virtualizing the application means running the application in a virtual machine (VM) that emulates the previous OS environment that supports the application and the hardware device. This way, the technician can avoid the need to replace the PC or the hardware device, or to restrict user access to the application. Virtualizing the application also allows the technician to benefit from the new OS features and security updates, while maintaining the functionality and compatibility of the application and the hardware device.

The other options are not as effective or feasible for this scenario. Restricting user access may prevent unauthorized or accidental changes to the application or the hardware device, but it does not solve the compatibility issue or allow the OS migration to proceed. Replacing the PC or the hardware device may be costly, time-consuming, or impractical, especially if the hardware device is rare, expensive, or customized. Upgrading the BIOS to UEFI may improve the boot speed, security, and compatibility of the PC, but it does not guarantee that the application or the hardware device will work with the new OS.

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The Official CompTIA A+ Core 1 Student Guide (Exam 220-1101) eBook2

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The 8-pin PCle power cable is designed to supply power to a graphics card that requires more power than the PCle slot can provide. A workstation that is running multiple GPUs in an SLI configuration would need this cable to ensure adequate power delivery and stability. The other cables are not suitable for this purpose, as they are either meant for the motherboard (4+4-pin ATX12V and 8-pin ATX12V) or for older devices (4-pin Molex)

https://superuser.com/questions/849265/is-there-a-difference-between-8-pin-eps12v-and-pci-e-connectors