quizzes: expand all 35 quizzes to 15 questions each

OPS-1 through OPS-10, OS-2, OS-3 went from 5 → 15.
OS-1, OS-4 through OS-11, SEC-1 through SEC-11, TRB-1 through TRB-4 went from 7 → 15.
Questions cover exam-weight scenarios not duplicated from original content.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

quizzes/OPS-9-quiz.md

@@ -42,6 +42,76 @@ B. EULA
 C. RMM  
 D. GFS  
 
+6. Which remote desktop protocol is built into Windows and transmits the desktop over port 3389?
+
+A. SSH  
+B. VNC  
+C. RDP  
+D. SFTP  
+
+7. Which protocol should be avoided for remote command-line access because it transmits data in plaintext?
+
+A. SSH  
+B. SFTP  
+C. Telnet  
+D. HTTPS  
+
+8. A technician is providing remote support and the user steps away. What should the technician do?
+
+A. Continue working unsupervised  
+B. Inform the user and wait or disconnect until they return  
+C. Access unrelated files  
+D. Change the user's password  
+
+9. Which type of VPN connects an individual device to a corporate network over the internet?
+
+A. Site-to-site VPN  
+B. Client-to-site (remote access) VPN  
+C. Mesh VPN  
+D. Tunnel-only VPN  
+
+10. Which RMM capability is most useful for IT teams managing many remote endpoints?
+
+A. Managing toner inventory  
+B. Remote monitoring, patch management, and scripted remediation  
+C. Printing to remote printers only  
+D. Managing physical access controls  
+
+11. What is a risk of leaving RDP exposed to the internet without additional controls?
+
+A. Reduced file transfer speeds  
+B. Brute-force and credential-stuffing attacks against the exposed service  
+C. Increased local printer latency  
+D. Reduced UPS efficiency  
+
+12. Which authentication improvement most reduces the risk of unauthorized remote access?
+
+A. Shorter passwords  
+B. Multi-factor authentication (MFA)  
+C. Disabling screen lock  
+D. Allowing guest accounts  
+
+13. A technician finishes a remote desktop session. What security step should they take?
+
+A. Leave the session idle  
+B. Log off the session rather than just closing the window  
+C. Disable the NIC  
+D. Restart the remote machine  
+
+14. Why should remote support sessions be logged and recorded?
+
+A. To increase bandwidth usage  
+B. To provide an audit trail for accountability and compliance  
+C. To reduce ticket priority  
+D. To replace the need for an SLA  
+
+15. Which tool allows a technician to securely transfer files to/from a remote Linux server?
+
+A. Telnet  
+B. RDP  
+C. SCP or SFTP  
+D. FTP  
+
 ## Answer Key For Instructor
 
 1. B
@@ -49,3 +119,13 @@ D. GFS
 3. C
 4. D
 5. C
+6. C
+7. C
+8. B
+9. B
+10. B
+11. B
+12. B
+13. B
+14. B
+15. C