Which two are advantages of static routing when compared to dynamic routing?（）
- ASecurity increases because only the network administrator may change the routing tables
- BConfiguration complexity decreases as network size increases
- CRouting updates are automatically sent to neighbors
- DRoute summarization is compued automatically by the router
- ERouting traffic load is reduced when used in stub network links
- FAn efficient algorithm is used to build routing tables,using automatic updates
- GRouting tables adapt automatically to topology changes.