In a PC-PLC point-to-point connection, what is unique about the IP addresses?

In a PC-PLC point-to-point connection, each device must have a unique IP address to facilitate communication. The different IP addresses are essential because they allow the devices to identify and communicate with each other without any confusion or conflicts. When two devices share the same IP address, it results in network communication issues, making it impossible for signals to reach the intended recipient properly.

Using different IP addresses ensures that data packets sent from one device can be effectively routed to the correct destination. This uniqueness in IP addressing also plays a crucial role in network organization and management, helping to avoid potential errors and enhancing the reliability of the communication between the PLC and the PC.

Although some of the other options mention conditions surrounding IP addresses, they do not accurately describe the necessity for unique addresses in a point-to-point setup, which is the central focus of effective communication in this scenario.