Which two are advantages of static routing when compared to dynamic routing？（）

• A、Security increases because only the network administrator may change the routing tables.
• B、Configuration complexity decreases as network size increases.
• C、Routing updates are automatically sent to neighbors.
• D、Route summarization iscompued automatically by the router.
• E、Routing traffic load is reduced when used in stub network links
• F、An efficient algorithm is used to build routing tables，using automatic updates.
• G、Routing tables adapt automatically to topology changes.