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4.4.1. DHCP and SLAAC
DHCP (Dynamic Host Configuration Protocol): Automatically assigns IP configuration to clients.
DHCP Components:
| Component | Function |
|---|---|
| Scope | Range of addresses to assign |
| Lease time | How long client keeps address |
| Reservations | Specific IP for specific MAC (servers, printers) |
| Exclusions | Addresses within scope not to assign |
| Options | Additional settings: default gateway, DNS servers, NTP |
| Relay/IP helper | Forwards DHCP broadcasts across subnet boundaries |
DHCP Process (DORA):
SLAAC (Stateless Address Autoconfiguration): IPv6 mechanism where hosts configure their own addresses. Routers advertise the network prefix; hosts append their own interface identifier (EUI-64 from MAC or random). No DHCP server required, though DHCPv6 can supplement with additional options.
Written byAlvin Varughese
Founder•15 professional certifications