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 is compued 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.