Static Routing
Manually configured routes that do not change unless an administrator updates them.
Static routing uses manually entered routing-table entries to forward packets along fixed, administrator-defined paths. Since the table never updates itself, the router uses no bandwidth on protocol messages and resists route injection. The key exam distinction is against dynamic protocols such as OSPF or EIGRP, which detect link failures and recalculate paths automatically. A static route stays until manually removed, so a failed link can create a black hole where packets are silently dropped. It therefore suits stub networks with one exit point, or a default route of last resort (0.0.0.0/0) sending unmatched traffic upstream.
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