CompTIA Updated 220-1101 Exam Questions and Answers by roscoe

Automatic Private IP Addressing (APIPA) allows a Windows PC to automatically assign itself an IP address in the range of 169.254.0.1 to 169.254.255.254 when it's unable to obtain an IP address from a DHCP server. This feature is particularly useful in situations where the PC cannot connect to the network or when DHCP services are unavailable. While APIPA addresses are not routable and thus not suited for large networks, they enable basic networking functionality for small ad-hoc or local networks.

To clean sticking keys on a laptop keyboard, using compressed air is the most effective and safest method. Compressed air can dislodge and remove crumbs, dust, and other debris from under the keys without risking damage to the keyboard's electronic components or the keys themselves. This approach is non-invasive and widely recommended for keyboard maintenance.

References:

CompTIA A+ Core 1 (220-1101) Exam Objectives, particularly sections related to maintaining and cleaning computer components and peripherals, which would cover best practices for keyboard cleaning.

General computer maintenance guidelines, highlighting the use of compressed air as a standard tool for cleaning keyboards and other computer parts where direct contact cleaning is not advisable.

If a smartphone repeatedly loses connection to a home Wi-Fi network and the common troubleshooting steps like restarting the device, rebooting the router, and resetting the Wi-Fi settings have not resolved the issue, updating the smartphone's operating system (OS) could be the next logical step. OS updates often include fixes for known bugs and improvements in connectivity and compatibility with network hardware, which could resolve persistent connection issues.

References:

CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically the sections related to troubleshooting mobile devices and connectivity issues, which would cover the importance of maintaining updated OS versions for optimal performance and compatibility.

General troubleshooting approaches for mobile devices, with an emphasis on the role of software updates in resolving connectivity and performance issues.

Routers are designed to connect multiple networks and direct packets to their intended destinations across network segments. This makes them essential for directing packets to networks outside of the LAN, such as the internet or other remote networks.

References:

CompTIA A+ Core 1 Exam Objectives Section 2.2: Compare and contrast common networking hardware.