CompTIA A+ details that an Automatic Document Feeder (ADF) allows multi-page documents to be scanned automatically without manually placing each sheet on the flatbed. This drastically increases scanning efficiency for large documents.
Flatbed scanners require manual placement for every page. Duplexing scans both sides of a page but does not feed multiple sheets by itself. Orientation configuration only affects image alignment.
The ADF is explicitly highlighted in the A+ study guide as the primary feature used in business environments when scanning high-volume documents efficiently.
Thus, the ADF is the correct solution because it automates page feeding and dramatically reduces scanning time, especially for hundreds of pages.

If only one key is not functioning and debris has been checked, replacing the individual keycap is the most cost-effective next step. It's a simple, low-cost option before considering more extensive repairs like replacing the entire keyboard.
Reference: "CompTIA A+ Complete Practice Tests" by Jeff T. Parker - Chapter 1, Question 10, page 8.

If only one print job fails and others succeed, it is often due to a paper type or tray selection mismatch for that specific job. If a print job is configured to use a tray that is empty or set to manual feed, it will not be released until resolved.
From CompTIA A+ 220-1101 Official Study Guide, Objective 4.3 - Printer troubleshooting:
"If a specific print job stalls while others succeed, check the job settings for specific tray or paper type configurations that do not match the printer's current setup." Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 4: Printer Troubleshooting CompTIA Exam Objectives 220-1101, Domain 4.3

Comprehensive and Detailed Step-by-Step Explanation:
To determine the correct device, we need to understand how a DOCSIS (Data Over Cable Service Interface Specification) network functions in a Small Office/Home Office (SOHO) environment:
C). Cable Modem:
A cable modem is required to convert the signal provided by the ISP (Internet Service Provider) over a DOCSIS network into a format that is usable by the local area network (LAN).
DOCSIS is a standard for high-speed internet over cable television infrastructure, and the cable modem acts as the gateway between the ISP's coaxial network and the LAN.
Without the cable modem, devices in the LAN would not be able to access the internet.
Reference: CompTIA A+ Core 1 Exam Objectives (220-1201), Domain 2.2 - Compare and contrast Internet connection types, network types, and their features.
Incorrect Options:
A). Switch:
A switch is used to connect multiple devices within the LAN. It does not connect the LAN to the ISP's DOCSIS network.
B). Firewall:
While firewalls provide security by managing inbound and outbound traffic, they do not serve as the interface between the ISP and LAN.
D). Router:
A router directs traffic between different networks (e.g., between a LAN and the internet). However, in a DOCSIS network, the cable modem is the device that first connects to the ISP. Many modern cable modems also include built-in routers, but the modem is the primary device needed.
E). Access Point:
An access point provides wireless connectivity within the LAN. It does not connect directly to the ISP or handle DOCSIS signals.
Key Takeaway:The correct device required to interface between the ISP's DOCSIS network and the SOHO LAN is the cable modem.

When a legacy application is running on multiple physical servers, and the organization wants to maintain it until retirement, the best CompTIA-aligned solution is virtualization. Virtualization allows the engineer to convert existing physical servers into virtual machines (VMs), a process known as P2V (Physical-to-Virtual) migration. This reduces hardware footprint, simplifies management, and isolates the application within a controlled environment. CompTIA A+ emphasizes virtualization for legacy support because it eliminates dependence on aging physical hardware while preserving application functionality exactly as before.
Virtual machines also provide snapshots, backups, failover capabilities, and easier resource allocation, making them more reliable than maintaining old hardware. A SAN (A) provides storage, not application hosting.
FaaS (B) is a serverless model inappropriate for legacy applications that require full OS environments. A configuration management platform (D) manages software deployments and settings but does not replace or consolidate physical servers.
Thus, virtualization is the most suitable and industry-standard method for sustaining legacy applications.