Which of the following best represents a logical address?

The best representation of a logical address is an IPv6 address. Logical addresses are used at the network layer of the OSI model and are essential for routing packets across different networks. IPv6, the most recent version of the Internet Protocol, provides a larger address space and better efficiency in address allocation compared to its predecessor, IPv4.

As a logical address, IPv6 is not tied to physical hardware and can change depending on the network configuration. This mobility is crucial for modern networking, as devices can be moved across networks without needing a new physical identifier.

Other address types mentioned, like a MAC address, are physical addresses that uniquely identify devices on a local network and do not provide routing information across different networks. While IPv4 is also a logical address, the question specifically seeks the option that best represents a logical address given the advancements in technology and design in network communication, making IPv6 the more appropriate choice.