220-1201 Question #125: Real Exam Question with Answer & Explanation

Question

A technician is experimenting with network configurations and has connected two laptops to an unmanaged switch. The technician configured one of the laptops with a static IP address of 192.168.1.1 and the other with a static IP address of 192.168.2.2. The laptops are not communicating with each other. Which of the following is the most likely explanation for this issue?

Options

• AThe technician needs to use a hub instead of a switch.
• BThe wireless NICs are malfunctioning.
• CPoE interferes with intersubnet communication.
• DThe laptops do not have access to a router.

Explanation

The laptops cannot communicate because they are on different IP subnets and there is no router to forward traffic between these subnets.

Common mistakes.

• A. Using a switch is generally superior to a hub for network performance and would not cause an issue with intersubnet communication; replacing a switch with a hub would not resolve the problem.
• B. The scenario describes a wired connection to an unmanaged switch, making wireless NICs irrelevant, and there is no information to suggest they are malfunctioning.
• C. Power over Ethernet (PoE) provides electrical power to network devices over the Ethernet cable and has no effect on logical IP addressing or intersubnet communication.

Concept tested. IP addressing and routing fundamentals

Reference. https://learn.microsoft.com/en-us/training/modules/network-fundamentals/3-tcp-ip-addressing

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