Menu

Information

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.

Chem Past Papers

Elena didn’t just memorize the answer about chiral centers and stereochemistry. She became obsessed. She spent hours researching the history: how thalidomide was never tested as a mixture of left- and right-handed molecules; how one isomer soothed morning sickness, while the other (in the body) converted into a teratogenic form.

So the next time you’re grinding through past papers, remember: one question might not just give you marks — it might give you a future. chem past papers

She wrote a 6-page extra essay and submitted it to her teacher “just for fun.” Her teacher, impressed, sent it to a local university professor. That professor offered Elena a summer internship in medicinal chemistry. Elena didn’t just memorize the answer about chiral

Maintain a digital or physical log of every mistake made during past paper practice. Categorize them into three columns: So the next time you’re grinding through past