A subnet mask of /25 corresponds to 255.255.255.128.
Here's a brief explanation of how this works:
- The "/25" notation indicates that the first 25 bits of the subnet mask are set to '1', while the remaining bits (32 - 25 = 7 bits) are set to '0'.
- In decimal representation, this translates to:
- 255 (11111111) for the first 24 bits,
- 128 (10000000) for the 25th bit,
- 0 for the remaining bits.
Thus, the answer is 255.255.255.128.