What is the difference between network Layer 2 and 3? TCP vs UDP Use cases What newer technologies would use UDP Unicast vs Multicast What's a three tier web architecture How would you limit downtime What about maximizing uptime for the Db What else would you do for a high volume distributed app web site What is continuous integration What ci/cd tools have you used What are the benefits of ci/cd What tools have you used for infrastructure monitoring Discuss durability vs availability Discuss SSD vs traditional disk What are the RAID levels Which one would a DB use How would you mitigate a DOS? What is identity management? Where are customer encryption keys stored How do you secure a web site What's a Web Application Firewall? How's it differ from a firewall? What is a Bastion host? What are SQL databases good for? What are NoSQL databases good for? How can a database be scaled? What is a CDN? How does a CDN make web sites faster How you challenge an existing process How do you challenge a customer How do you sell cloud to a compliance group