A /23 subnet provides 512 total addresses, of which 510 are usable (subtracting 2 for network and broadcast addresses). This would satisfy the need for 255 additional addresses.

The correct answer is D. DHCP reservation. In a network environment, printers are typically configured to use a consistent IP address so that client devices can reliably locate them. After a power outage, network devices such as printers may reboot and request a new IP address from the DHCP server. If the printer was previously assigned a dynamic IP address, it may now receive a different address, causing users' systems to lose connectivity because they are still trying to print to the old IP.
A DHCP reservation ensures that a specific device (identified by its MAC address) always receives the same IP address from the DHCP server. This combines the convenience of DHCP with the stability of static addressing, which is ideal for shared resources like printers.
The other options are incorrect for this scenario. DoH (DNS over HTTPS) secures DNS queries and is unrelated to IP address assignment. SLAAC (Stateless Address Autoconfiguration) is used for IPv6, not IPv4 environments. APIPA (Automatic Private IP Addressing) assigns a link-local address when DHCP fails, but it does not provide consistent or routable addressing suitable for shared printers.
Therefore, configuring a DHCP reservation ensures consistent network access to the printer after power disruptions.

The most likely reason the camera is not working is that the single PoE connection exceeds the maximum power allowed per port. The switch supports a total PoE budget of 124W, but each port has a maximum output of 16W. The camera requires 14W, and the enhancer requires 4W. Together, they require 18W on one connection. Since 18W exceeds the switch's maximum of 16W per port, the device may fail to power on or operate correctly.
The CompTIA Network+ N10-009 objectives include understanding network devices, cabling, power delivery, and Power over Ethernet limitations. PoE design requires checking both the total switch PoE budget and the per-port wattage limit. The total budget is not the issue here because the listed devices do not exceed
124W overall. Crosstalk and improper termination could cause connectivity or performance issues, but the provided wattage values strongly point to a power limitation. Since the camera and enhancer together require more power than the port can deliver, option D is the correct answer.

The correct choice is B. Using a single public IP. PAT (Port Address Translation) is a form of NAT that allows many internal private IP addresses to share one public IP address by tracking sessions with port numbers. This is one of the most common edge-network designs for homes, small offices, and many enterprise branch environments.
The reason PAT is so useful is that it conserves public IPv4 addresses. Internal hosts keep their private addressing, and when they access external resources, the firewall or router translates those connections so they appear to come from one public address, while still keeping each session unique through port mapping.
The other options are unrelated to PAT's primary purpose. BGP is a routing protocol for route exchange between networks. Redundant ISPs deal with resiliency and multihoming, not port-based address translation.
A dual-stack IP scheme means running IPv4 and IPv6 together, which is separate from the NAT/PAT function.
This question is really asking what situation most naturally calls for PAT. When an organization wants multiple internal devices to reach the internet without assigning each device its own public IPv4 address, PAT is the standard solution. That makes using a single public IP the best answer.

Comprehensive and Detailed Explanation (paraphrased, aligned to N10-009):
SSH provides secure, scriptable remote access used by automation/orchestration tools (e.g., leveraging CLI, NETCONF over SSH, or Ansible modules) to push configurations at scale.
* A. RDP is primarily for Windows GUI sessions and is not commonly used for network device automation.
* B. Telnet can be scripted but is insecure (plaintext); modern best practice is to use SSH.
* D. GUI access is typically manual and not ideal for scalable, repeatable automation.
References (CompTIA Network+ N10-009):
* Domain: Network Operations - Configuration management, automation/orchestration, secure management protocols (SSH vs. Telnet), change at scale.