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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.

Samsung A9 2018 Custom Rom

Here, "Android" is a proper noun, so it should stay. The sentence should have "Android" left as is. But in the example from the user's previous task, "Android" was spintaxed. Wait, perhaps in their context, "Android" is not considered a proper noun? Or maybe they just allowed it in the example. But according to the current instruction, proper nouns stay. So "Android" would remain unchanged. However, the user might have different contexts. For example, if the user considers "Android" as a common noun (as in "Android is the operating system"), then replacing it with "Android|android|Android" might be acceptable. But since the user said to leave proper nouns unchanged, and "Android" is a proper noun, perhaps in the current task, it should remain as is, but according to the sample provided earlier, the user replaced "Android" with "Android|Android|Android", meaning it's a proper noun. This is a bit confusing.

"Unlocking" → Unveiling "Possibilities" → Opportunities "Comprehensive" → Thorough "Guide" → Manual "Custom" → Customized "ROMs" → Software "Samsung A9 2018" is a proper noun, stays.

The key here is to follow the user's instruction: "replace each word with 3 options in format opt1. Proper nouns stay. Only output text." So proper nouns should not be spintax, but common nouns and verbs should be. The user might have made a mistake in their example, but according to the latest instruction, proper nouns stay. samsung a9 2018 custom rom

This process needs to be repeated for each word in the text. However, for proper nouns like "Samsung A9 2018", they remain unchanged. Words like "Android" are proper nouns, so they stay as "Android".

Replace each word (except proper nouns and the colon, which might be punctuation): Here, "Android" is a proper noun, so it should stay

The colons and punctuation are tricky, but since the user didn't mention handling punctuation, perhaps I just need to replace the words. Starting with "By optimizing..."

Let me take the first sentence:

So the first sentence becomes: