You need an address to speak on a network, but you need to speak to get an address. DHCP solves this impossible problem through a four-step negotiation that happens before your device has any identity at all.
DHCP doesn't give you an IP address—it lends you one. Here's how the lease lifecycle works, from optimistic renewal to desperate rebinding to eviction.
The choice isn't automatic vs. manual—it's where the intelligence lives. How DHCP reservations give you centralized management and predictable addresses, and why the spreadsheet always loses to the database.
The Internet ran out of addresses in 2011. Your home IP is a timeshare—temporary, shared, and rotated. Here's how that works and when it actually matters.
When your device shows 169.254.x.x, it's not a fallback address—it's your network announcing it's broken. Understanding APIPA means understanding why visible failure beats silent failure.
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