CCNA questions. Behavioural questions. linux, What are problems you found with AWS? Can you explain the DNS system? How to deal with an angry customer Have trained any of you fellow students or coworkers any time? What is most difficult course you have taken so far? How did you managed with it? 1. common ports 2. active directory 3. IPsec 4. DHCP 5. DNS HTTP codes 404, 403, 200 How DNS work How DHCP work Network troubleshooting commands 1. Difference between DNS and IP? 2. Private IP vs Public IP? 3. Cloud v Vitualization 4. How to handle problems like CPU is 100% occupied or the computer is slow what are the possible problems? what is difference between TCP and UDP. give a application example for each.