In MikroTik RouterOS, which subnet size allows Layer 3 communication between two hosts?

Layer 3 communication between two hosts requires that there be enough usable IP addresses in the subnet to accommodate those hosts. In the context of subnetting, each subnet has a certain number of addresses available, and the structure of those addresses determines how many hosts can communicate with each other.

A subnet size of /29 provides a total of 8 IP addresses (2^3 = 8, since 32 - 29 = 3). In a /29 subnet, there are 6 usable addresses, after accounting for the network address and the broadcast address. This allows for 6 individual devices to communicate directly with each other on the same network, fulfilling the requirement for Layer 3 communication.

In contrast, other subnet sizes listed have different limitations. A /31 subnet allows for only 2 addresses, intended specifically for point-to-point links, which makes it unsuitable for general communication between more than two hosts. A /32 subnet provides only 1 usable address — this is mostly used for host-specific addressing rather than allowing for communication between multiple hosts. Lastly, a /30 subnet provides only 4 total addresses (with 2 usable), which is also limited but can work for point-to-point connections yet does not support as many hosts as a /