Your question is RSTP Flags, SSH Troubleshooting, and DNS Flow. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What new flags are introduced by RSTP BPDU, how do you troubleshoot when a user cannot SSH to a server, what happens when you type google.com in a browser, why ARP is used and its types, how DNS resolution leads to TCP handshake and HTTP exchange, explain the DORA process, how do you motivate a customer during escalation, and how do you troubleshoot spanning tree and switching networks?