サンプル問題 1： A technician needs to provide remote support for a legacy Linux-based operating system from their Windows laptop. The solution needs to allow the technician to see what the user is doing and provide the ability to interact with the user's session. Which of the following remote access technologies would support the use case?
A: VPN
B: VNC
C: SSH
D: RDP
正解：B
Explanation: Comprehensive and Detailed Explanation From Exact Extract: The correct answer is VNC (Virtual Network Computing). VNC is a graphical desktop-sharing system that uses the Remote Frame Buffer protocol (RFB) to remotely control another computer. It is platform-independent and widely supported on Linux, which makes it ideal for providing interactive remote support for a Linux-based operating system. It allows the technician not only to view the remote desktop session but also to control it, fulfilling the need to see and interact with the user’s session. A. VPN (Virtual Private Network) creates a secure tunnel to a network but does not provide desktop sharing or session control by itself. C. SSH (Secure Shell) provides secure command-line access to Unix/Linux systems but does not offer graphical desktop interaction, which is a requirement in this case. D. RDP (Remote Desktop Protocol) is primarily a Microsoft protocol, and although it can be made to work on Linux, it is not natively supported on legacy Linux systems, and thus less suitable than VNC in this scenario. ✅ CompTIA A+ 220-1102 Core 2 Objective Reference: Objective 1.8 C Given a scenario, use features and tools of the operating system. Under this objective, candidates are expected to be familiar with remote access technologies, including RDP, SSH, and VNC, and understand their appropriate uses and limitations on different platforms such as Windows and Linux.
サンプル問題 2： A technician is attempting to join a workstation to a domain but is receiving an error message stating the domain cannot be found. However, the technician is able to ping the server and access the internet. Given the following information: IP Address C 192.168.1.210 Subnet Mask C 255.255.255.0 Gateway C 192.168.1.1 DNS1 C 8.8.8.8 DNS2 C 1.1.1.1 Server C 192.168.1.10 Which of the following should the technician do to fix the issue?
A: Change the DNS settings.
B: Assign a static IP address.
C: Configure a subnet mask.
D: Update the default gateway.
正解：A
Explanation: Comprehensive and Detailed Explanation From Exact Extract: The issue described―“domain cannot be found” despite the ability to ping the server and access the internet―indicates a DNS resolution problem, not a network connectivity issue. The workstation is currently using public DNS servers (8.8.8.8 and 1.1.1.1) which cannot resolve internal domain names, such as the ones used in Active Directory environments. To resolve this, the technician needs to change the DNS settings to point to the internal DNS server, which in most domain setups is the domain controller itself (likely 192.168.1.10 in this case). Here’s the breakdown of the incorrect options: B. Assign a static IP address: The IP is already assigned and functioning; the device can ping and reach the network and internet. C. Configure a subnet mask: The subnet mask is appropriate for the network range (Class C /24). D. Update the default gateway: The gateway is valid and allows internet access; this is not the issue. ✅ CompTIA A+ 220-1102 Core 2 Objective Reference: Objective 1.8 C Given a scenario, use features and tools of the operating system. Under this objective, candidates must know how to troubleshoot OS-based network configurations, including proper DNS settings in domain environments.
サンプル問題 3： MFA for a custom web application on a user's smartphone is no longer working. The last time the user remembered it working was before taking a vacation to another country. Which of the following should the technician do first?
A: Verify the date and time settings.
B: Apply mobile OS patches.
C: Uninstall and reinstall the application.
D: Escalate to the website developer.
正解：A
Explanation: Time-based one-time password (TOTP) MFA apps rely on accurate clock synchronization. Traveling can desynchronize the device’s clock, causing generated codes to be invalid. Ensuring the smartphone’s date/time (and time zone) are correct will typically restore MFA functionality immediately.
