Hello, can someone comment, the questions which use "Articulation points" or "bridges" thanks

1. https://leetcode.com/problems/critical-connections-in-a-network/
2. https://leetcode.com/problems/minimize-malware-spread/
3. https://leetcode.com/problems/minimize-malware-spread-ii/
4. https://leetcode.com/problems/minimum-number-of-days-to-disconnect-island/

I did something similar for dijiktras (i can't spell it) algo here - https://leetcode.com/discuss/interview-question/731911/please-share-dijkstras-algorithm-questions