1. What is the default port for the DNS (Domain Name System) query service?
a) 80
b) 443
c) 53
d) 21
Answer: c) 53
2. Which port does the POP3 protocol use for unsecured email retrieval?
a) 110
b) 143
c) 443
d) 993
Answer: a) 110
3. What port is used by the SSH File Transfer Protocol (SFTP)?
a) 443
b) 21
c) 22
d) 23
Answer: c) 22
4. What is the default port for the RADIUS protocol?
a) 1812
b) 22
c) 80
d) 443
Answer: a) 1812
5. Which port is used by the NTP (Network Time Protocol)?
a) 23
b) 80
c) 123
d) 161
Answer: c) 123
6. What is the port number used by the Microsoft SQL Server?
a) 3389
b) 1433
c) 8080
d) 22
Answer: b) 1433
7. What port does the PPTP (Point-to-Point Tunneling Protocol) use?
a) 443
b) 1723
c) 1194
d) 500
Answer: b) 1723
8. Which port is used by the LDAP over SSL (LDAPS) protocol?
a) 389
b) 636
c) 8080
d) 53
Answer: b) 636
9. What port does the HTTP/2 protocol use?
a) 80
b) 8080
c) 443
d) 21
Answer: c) 443
10. Which port is used by the MS Exchange (Microsoft Exchange) service?
a) 443
b) 25
c) 993
d) 587
Answer: d) 587
11. What is the port number for the CIFS (Common Internet File System) protocol?
a) 21
b) 445
c) 443
d) 139
Answer: b) 445
12. Which port is used by the NFS (Network File System) protocol?
a) 2049
b) 25
c) 21
d) 443
Answer: a) 2049
13. What port does the SNMP (Simple Network Management Protocol) Trap use?
a) 161
b) 162
c) 443
d) 53
Answer: b) 162
14. Which port does the IMAP over SSL (IMAPS) protocol use?
a) 110
b) 993
c) 143
d) 80
Answer: b) 993
15. What port is used by the FTPS (FTP Secure) service?
a) 990
b) 443
c) 20
d) 80
Answer: a) 990
16. What port does the HTTPS protocol use?
a) 443
b) 80
c) 8080
d) 21
Answer: a) 443
17. What is the port number used by the SIP protocol for secure signaling?
a) 5061
b) 5060
c) 80
d) 21
Answer: a) 5061
18. Which port is used by the IRC (Internet Relay Chat) protocol?
a) 6660–6669
b) 80
c) 443
d) 21
Answer: a) 6660–6669
19. What is the default port for the XMPP (Extensible Messaging and Presence Protocol)?
a) 443
b) 5222
c) 80
d) 25
Answer: b) 5222
20. What port is used by the VNC (Virtual Network Computing) protocol?
a) 8080
b) 3389
c) 5900
d) 22
Answer: c) 5900
21. What is the port number used by the L2TP (Layer 2 Tunneling Protocol)?
a) 1723
b) 500
c) 443
d) 22
Answer: a) 1723
22. What port does the BGP (Border Gateway Protocol) use?
a) 179
b) 443
c) 8080
d) 53
Answer: a) 179
23. What is the default port for the MTP (Mobile Transfer Protocol)?
a) 1734
b) 80
c) 443
d) 123
Answer: a) 1734
24. What is the port number used by the TFTP (Trivial File Transfer Protocol)?
a) 21
b) 23
c) 69
d) 443
Answer: c) 69
25. Which port does the RDP (Remote Desktop Protocol) use?
a) 3389
b) 80
c) 22
d) 443
Answer: a) 3389
26. What is the default port used by the H.323 protocol?
a) 1720
b) 25
c) 80
d) 443
Answer: a) 1720
27. What is the port number for the RADIUS Accounting protocol?
a) 1813
b) 1812
c) 20
d) 53
Answer: a) 1813
28. What is the default port for the Kerberos authentication protocol?
a) 88
b) 443
c) 53
d) 21
Answer: a) 88
29. Which port is used by the DHCPv6 (Dynamic Host Configuration Protocol for IPv6)?
a) 67
b) 546
c) 123
d) 21
Answer: b) 546
30. What is the port number used by the SFTP (Secure FTP)?
a) 22
b) 80
c) 21
d) 23
Answer: a) 22
