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Updated version of the classic Subnetting Practice question generator by Practical Networking.

Feedback? Mention it on my Discord server: pracnet.net/discord.

Instructions:

Each time you click "Next Problem" (or reload the page) a random IP address and CIDR value is generated.

You are then tasked to solve the Network ID, Broadcast IP, First Host IP, Last Host IP, and Next Network addresses for the target IP.

Options:

  • Auto‑fill non‑interesting octets pre-fills the octets that aren’t part of the subnet calculation. For example: with a /24, the first three octets are filled in each answer row.
  • Auto‑check automatically checks a row once all four octets are entered.

Work ((better)) | Meeting Komi After School

Walking home, I realized how much the ordinary world had changed—shrunk into details I hadn’t noticed before. The sky seemed less like a generic ceiling and more like a conversation partner—nuanced, shifting, full of subtext. I had thought meeting Komi would be an exercise in charity, a lesson in sympathy. Instead, it became a lesson in humility. She offered me a different pace: slow enough to notice the way light moves across a page, loud enough to show that silence, too, has a voice.

Inside the library, the light had the color of old paper. Shelves rose like city blocks; each book was a window into inhabited silence. Komi seated herself at the corner table by the window and opened her notebook. We spread our work between us—the ordinary homework that has the magic of being shared. Occasionally she would write something and hand the notebook to me. Sometimes I wrote back. Occasionally, we both laughed—timid, surprised, the kind of laugh that patches an awkward seam. meeting komi after school work

What struck me was how rare the exchange felt: language not as a torrent but as a crafted series of small vessels, each carrying something fragile and important. Komi’s words, when they came, were measured lanterns. My words, when offered, felt newly responsible for illuminating rather than crowding. Conversations with her taught me to listen like someone who had to catch light in cupped hands. Walking home, I realized how much the ordinary