What is subnetting?

Subnetting is the process of dividing a larger, more complex network into smaller, manageable sub-networks, or subnets. This practice enhances both performance and security within the overall network architecture. By subdividing a network, it limits the number of devices in each subnet, which can decrease congestion and allow for more efficient data transmission. Additionally, subnets can enhance security by isolating different segments of a network, allowing for tailored security policies that are specific to the needs of those segments.

The importance of subnetting becomes evident in larger networks, where it helps in organizing the IP address space more efficiently and facilitates better management of network resources. It improves routing efficiency, reduces broadcast traffic, and can simplify troubleshooting.

The other choices reference different networking concepts: encrypting traffic relates to securing data, connecting devices wirelessly pertains to wireless communication technology, and increasing data transmission speed refers to improvements in data transfer rates rather than organizational structure in networking. Therefore, only the process of creating smaller sub-networks aligns precisely with the definition of subnetting.