CompTIA Updated 220-1201 Exam Questions and Answers by fraser

A PoE injector is used to add power to an Ethernet cable, enabling the cable to deliver both power and data. This is crucial when connecting to PoE-enabled devices like IP cameras or wireless access points that are far from power outlets.

The most likely cause is a swollen battery, which occurs when the battery's internal components break down, causing a buildup of gas. This results in:

Physical Symptoms: The battery bulges, pushing the screen away.

Operational Symptoms: The device may still power on when connected to a charger but fails to hold a charge due to battery degradation.

Option A (Malfunctioning power supply): Incorrect. Power supply issues affect charging but do not cause physical bulging.

Option B (Damaged charge port): Incorrect. A damaged port can prevent charging but does not explain the bulge.

Option D (Broken screen): Incorrect. A damaged screen does not cause the device to bulge; it is likely a secondary effect of the swollen battery.

Safety Note: A swollen battery poses a risk of fire or explosion and should be replaced immediately following proper disposal procedures.

The virtualization platform described matches the characteristics of containers. According to CompTIA Core 1 (220-1201) virtualization concepts, containers are lightweight virtualization solutions that share the host operating system and kernel, rather than running separate guest operating systems. This design allows containers to start almost instantly and be deployed rapidly, making them highly efficient and scalable.

Because containers share kernel resources, they use significantly fewer system resources compared to traditional virtual machines. However, this also results in limited isolation, since applications are not fully separated at the OS level. This tradeoff is a defining characteristic of container-based virtualization.

A Type 1 hypervisor runs directly on hardware and hosts fully isolated virtual machines, each with its own operating system, which does not align with the shared OS and kernel described. A virtual machine also includes a full guest OS, leading to slower startup times and greater resource usage. A virtual desktop refers to user desktop virtualization, not application-level virtualization.

CompTIA highlights containers as an example of application virtualization that prioritizes speed, efficiency, and portability over complete isolation.

DHCP normally assigns IP addresses dynamically using timed leases, meaning the address may change after expiration. However, many devices—such as servers, printers, or specialized workstations—require permanent, predictable IP addresses. CompTIA A+ identifies a DHCP reservation as the correct method for assigning a consistent IP while still using DHCP.

A reservation binds a device’s MAC address to a specific IP address in the DHCP server. Each time the device requests an address, the DHCP server recognizes the MAC address and issues the same IP. This provides reliability while still allowing centralized management of network addressing.

A lease is temporary and not permanent. An exclusion simply removes certain IP addresses from the assignable pool—it does not assign any device a fixed address. A scope option configures additional network parameters such as DNS, gateway, or WINS settings but does not assign static IPs.

Therefore, a reservation is the correct method to permanently assign an IP address using DHCP without requiring static configuration on the device itself.