Computer networks notes
The Subnet Mask
How a device uses a mask and a bitwise AND to decide: send direct, or route? Every section is a drawn page beside a clear written explanation, about 11 minutes in all.
- Chapter 4 of 31
- About 11 minutes
- 9 sections
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In this chapter
- Why we need a subnet mask
- A mask looks like an IP
- 255 means "all ones"
- The bitwise AND rule
- Working an example
- Same network? Send direct
- Different network? Route it
- A /16 mask
- Why developers care: latency
Next chapters
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DSA comes with the all labs plan and every ChaiCode batch.