IP address and fitness tracker: what they have in common

1. Step 1. IP address — is a kind of — TCP/IP. Part of IP.
2. Step 2. TCP/IP — is used in — Router. IP routing.
3. Step 3. Router — has part — System on a chip (SoC). A packet-processing processor.
4. Step 4. System on a chip (SoC) — is part of — Smartwatch. Inside is a system on a chip.
5. Step 5. Smartwatch — evolved from — Fitness tracker. Tracker functions moved into watches.

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