Port Number Quiz

1. A legacy mail configuration retrieves messages on port 110. Which protocol does that identify?

2. A network rule must allow client requests to reach a DHCP server. On which UDP port does the server normally listen?

3. Which port is normally used for POP3 with implicit TLS encryption?

4. Which port is the established default for Secure Shell (SSH) connections?

5. A directory client must connect to LDAP over implicit TLS, often called LDAPS. Which port is the established default?

6. You are configuring an email client to retrieve mail through IMAP using implicit TLS. Which port should you enter?

7. A development server is described as running HTTP on a common alternative to port 80. Which port is most likely meant?

8. An email application is being configured to submit outgoing messages using SMTP with STARTTLS. Which standard submission port is the best choice?

9. A firewall must permit the FTP control connection on its established default port. Which port should be allowed?

10. Which default port is used for unencrypted HTTP traffic?

11. A resolver sends a standard Domain Name System query to a DNS server. Which destination port is normally used?

12. A PostgreSQL server is using its standard listening port. Which port should a database client target?

13. A browser connects to a website using HTTPS without a custom port in the URL. Which destination port does it normally use?

14. A monitoring station is polling an SNMP agent rather than receiving an unsolicited trap. Which destination UDP port does it normally use?

15. A computer needs to synchronize its clock with a standard Network Time Protocol server. Which destination port should be reachable?

16. An administrator needs to permit standard Remote Desktop Protocol connections to a Windows host. Which destination port is expected?