问题：
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
Refer to the exhibit. Which two of these are correct regarding the recommended practice for distribution layer design？（）
● 参考解析
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