5d (edited) • 💡 CCNA Concepts
⚠️ MISTAKE I See Students Make with Subnetting
Here's a trap I see all the time:
The Mistake:
Students calculate the subnet mask perfectly... then forget to check if the IP is actually IN that subnet.
Example:
IP: 192.168.10.50 /26
Subnet: 192.168.10.0 - 192.168.10.63
Looks good, right? But what if the question asks: "Is 192.168.10.75 in the same subnet?"
The Fix:
ALWAYS identify the range FIRST:
- Network: .0
- First Host: .1
- Last Host: .62
- Broadcast: .63
NOW you can see .75 is NOT in this subnet.
Pro Tip:
Draw the range on paper during exams. Takes 5 seconds, saves points.
What's YOUR biggest subnetting struggle? Drop it below 👇
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⚠️ MISTAKE I See Students Make with Subnetting
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