Which two of these are correct regarding the recommended practice for distribution layer design based on the following configuration?()<br /> <img src="https://nimg.ppkao.com/2018-07/longzhengxuan/2018072517001112103.jpg?sign=900862efdeeb5b79393808a63839b5a7&t=62d265be" />
A、use a Layer 2 link between distribution switches
B、use a Layer 3 link between distribution switches
C、use a redundant link to the core
D、use a Layer 3 link between distribution switches with route summarization