问题：

[多选] 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.