Logical segmentation can be achieved using:

Logical segmentation refers to the practice of isolating different network segments to improve security and manageability. Using subnets is a foundational method for achieving this segmentation. By dividing a larger network into smaller, more manageable sub-networks (subnets), organizations can control traffic flows, apply specific security policies, and limit the exposure of sensitive data. Each subnet can act as its own domain, where distinct security measures and access controls can be implemented based on the needs of the segment.

This approach enhances security by ensuring that even if one segment is compromised, the rest of the network remains protected. It also improves network performance by reducing broadcast traffic and can simplify management since policies can be applied at the subnet level.

While elements like User-ID can assist in controlling user access based on identity, and App-ID can help in identifying and managing applications traversing the network, they do not directly provide the structural isolation and management capabilities that subnets do. Timestamps are not related to network segmentation and are used primarily in logging and monitoring contexts. Thus, subnets serve as the most effective and direct method for achieving logical segmentation in networking environments.