Static routes are manually configured by network administrators and are not dynamically updated by routing protocols. Let us analyze each option:
* Option A :
* Correct : Static routes are manually added to the routing table by the administrator. They remain unchanged unless manually modified or removed.
* Option B :
* Incorrect : Static routes are not automatically recalculated when the network topology changes.
If a static route becomes invalid due to a topology change, the administrator must manually update it.
* Option C :
* Incorrect : Static routes are not learned from other routing protocols. Routes learned from dynamic protocols (e.g., OSPF, RIP) are dynamic routes, not static routes.
* Option D :
* Incorrect : Static routes are not preconfigured on routers before delivery. They are configured by administrators based on the network design.
Thus, the correct answer is A .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: Static Routing.
* Routing Protocols and Static Routes by Huawei.