问题：

[多选]

Refer to the exhibit. Which two of these are correct regarding the recommended practice for distribution layer design？（）

A . use a redundant link to the core
B . use a Layer 2 link between distribution switches
C . never use a redundant link to the core because of convergence issues
D . use a Layer 3 link between distribution switches with route summarization
E . use a Layer 3 link between distribution switches without route summarizatio