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 iscompued 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.