"Use private VLANs: Also known as port isolation, creating a private VLAN is a method of restricting switch ports (now called private ports) so that they can communicate only with a particular uplink. The private VLAN usually has numerous private ports and only one uplink, which is usually connected to a router, or firewall."

CNAME stands for Canonical Name, and it is a type of DNS record that creates an alias for another domain name. A CNAME record can be used to redirect a network resource that has been moved to a different location, such as a SaaS solution. For example, if a web server that was previously hosted on the local network with the domain name www.example.com is now hosted by a SaaS provider with the domain name www.saasprovider.com, a CNAME record can be created to point www.example.com to www.saasprovider.com. This way, the users can still access the web server using the original domain name, and the DNS server will resolve it to the new domain name.
Reference
CNAME is one of the common DNS record types covered in Objective 1.6 of the CompTIA Network+ N10-008 certification exam1.
CNAME can be used to redirect a network resource that has been moved to a different location23.
CNAME creates an alias for another domain name23.
1: CompTIA Network+ Certification Exam Objectives, page 4 2: DNS Record Types - N10-008 CompTIA Network+ : 1.6 3: The Official CompTIA Network+ Student Guide (Exam N10-008), Chapter 1, page 32

To find all devices connected within a network, a technician can use an IP scanner. An IP scanner sends a ping request to all IP addresses within a specified range and then identifies the active devices that respond to the request.

The network engineer is installing Access Points (APs) for a Small Office/Home Office (SOHO) where every staff member uses a cordless phone. The goal is to reduce interference. Let's evaluate the options:
802.11a: Operates in the 5 GHz frequency band. It provides higher data rates but has shorter range and poorer penetration through walls due to its higher frequency. It is less likely to interfere with cordless phones.
802.11b: Operates in the 2.4 GHz frequency band. It has slower data rates but better range and wall penetration. However, it shares the same frequency band with many cordless phones, microwave ovens, and other devices, leading to potential interference.
802.11g: Also operates in the 2.4 GHz frequency band. It provides higher data rates than 802.11b but maintains backward compatibility with 802.11b devices. Like 802.11b, it shares the same frequency band with cordless phones and other devices.
802.1X: This is not a wireless standard. It is an authentication protocol used for network access control.
Given the scenario, 802.11a would work best to reduce interference because it operates in the 5 GHz band, which is less crowded and less likely to overlap with cordless phones.

A camera is most likely to utilize PoE (Power over Ethernet). PoE is a technology that allows electrical power to be delivered over Ethernet cables. It is used to power a variety of devices, such as cameras, phones, access points, and other networking equipment.Cameras are particularly well-suited for PoE because they are often installed in locations where it is difficult or impossible to run electrical power. By using PoE, cameras can be powered directly over the Ethernet cable, eliminating the need for separate power cables and outlets.Other devices, such as printers, hubs, and modems, are less likely to utilize PoE because they typically do not need to be powered over Ethernet. These devices are usually powered by AC (alternating current) power and are typically connected to a power outlet rather than an Ethernet cable.