220-1102 Exam Dumps - CompTIA A+ Certification Core 2 Exam

DNS (Domain Name System) lookups are essential for translating human-friendly domain names into IP addresses that computers use to communicate. DNS typically uses port 53 for its communication.

In the provided firewall output, various ports are either allowed or blocked for outgoing traffic. For DNS recursion, which is the process of resolving domain names to IP addresses, port 53 must be open.

Port 53: This is the standard port used by DNS for queries and responses. The fact that it is currently blocked (as per the firewall output) is the reason why DNS lookups are failing. Opening port 53 will allow the DNS requests to pass through the firewall, enabling the resolution of domain names to IP addresses.

Other ports mentioned in the output are used for different services and protocols:

Port 1 is generally not used for standard services.

Port 445 is associated with SMB (Server Message Block) for file sharing in Windows environments.

Port 123 is used by NTP (Network Time Protocol) for time synchronization.

Port 80 is used for HTTP traffic, which is web traffic but not related to DNS lookups.

Given that the smartphone's screen was recently repaired and now experiences issues with Wi-Fi connectivity, despite showing that it is connected to a network, the problem could be related to the internal antenna connections that might have been disturbed or disconnected during the repair process.

Internal Antenna Connections: Smartphones use internal antennas for Wi-Fi and cellular connections. If these antennas are not properly connected, the device may show as connected to a Wi-Fi network but fail to transmit data effectively, resulting in no internet access.

Checking static IP settings (B) would be relevant if the device were not obtaining an IP address at all, but the device does have an IP address. Airplane mode (C) would prevent the device from connecting to Wi-Fi networks entirely. Digitizer calibration (D) is related to the touchscreen functionality and would not affect Wi-Fi connectivity.

For securely disposing of SSDs, physical destruction methods like shredding are considered most effective:

Shredding: This method involves physically breaking the SSD into small pieces, making data recovery practically impossible. It's a recommended practice for ensuring that sensitive data on SSDs is irretrievably destroyed.

Booting in safe mode is the initial step to diagnose a computer experiencing a blue screen of death (BSOD) following a failed Windows 10 update. Safe mode starts the computer with a minimal set of drivers and services, allowing troubleshooting and identification of the problematic software or driver causing the BSOD. This mode provides a safer environment to uninstall recent updates or drivers, perform system scans, and restore the system if necessary. Other options like System Restore wizard, last known-good configuration, and resetting BIOS settings may be subsequent steps but do not directly diagnose the issue as effectively as booting in safe mode.

Multifactor authentication (MFA) significantly enhances security by requiring two or more forms of verification before granting access to an account or system. This method is highly effective against brute-force attacks, where attackers attempt to guess a user's password through repeated trials. By implementing MFA, even if a password is compromised, unauthorized access is still prevented without the additional authentication factor(s), such as a code from a smartphone app, a fingerprint, or a physical security token.

Multifactor authentication: Provides an additional layer of security beyond just the password, making it much harder for attackers to gain unauthorized access through brute-force methods, as they would need to compromise more than one authentication factor.

Encryption (B) is crucial for protecting data at rest and in transit, but it does not directly prevent brute-force login attempts. Increased password complexity (C) can deter brute-force attacks by making passwords harder to guess, but it is not as effective as MFA in preventing access when passwords are compromised. A secure password vault (D) helps users manage and store their passwords securely, which can indirectly contribute to security by allowing users to keep more complex passwords, but it does not directly prevent brute-force attacks on accounts.

Group Policy is a feature in Windows that allows network administrators to manage and configure operating system, application settings, and user settings in an Active Directory environment. It can enforce password policies across the network, including password length requirements, making it the best tool for ensuring compliance with security policies.

A rollback plan describes the process of reverting a system to its previous state after a failed upgrade or change. This ensures system stability and functionality by restoring known good configurations and is a crucial part of change management to minimize disruptions in case of unsuccessful updates.

After successfully mitigating a malicious event caused by an infected email, the final step before considering the event closed is to complete an incident report. This document should detail the nature of the incident, the steps taken to resolve it, and any lessons learned to improve future responses to similar threats.