WTF is a subnet prefix length? Can someone break it down like I'm 5? or Seriously, WTF is a subnet pr

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Dude, subnet prefix length is basically how you split up your IP space. Think of it like slices of pizza—the bigger the number after the /, the smaller the slice.

A /24 means you get 256 IPs (well, 254 usable ones). A /16? That’s a *huge* chunk—like 65k IPs.

Why care? Cuz if you’re setting up a home network, /24 is plenty. But if you’re a company, you might need /16 or bigger.

Mess with it wrong, and yeah, you could break stuff. But if you’re just tweaking a home router, you’re probably fine.

Check out [this subnet calculator](https://www.calculator.net/ip-subnet-calculator.html) to play around with it.

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