1. What is port 22 → SSH ? Junior A. the well-known port for LDAP secured with TLS B. the legacy protocol that maps a MAC address to an IP address C. the protocol for monitoring and managing network devices, typically on port 161 D. the well-known port for encrypted remote shell access
2. Which term means: "the well-known port for encrypted remote shell access"? Junior A. NTP B. ARP C. port 23 → Telnet D. port 22 → SSH
3. Which statement is correct? Junior A. port 22 → SSH — the well-known port for sending email between mail servers B. port 22 → SSH — the protocol for monitoring and managing network devices, typically on port 161 C. port 22 → SSH — the well-known port for encrypted remote shell access D. port 22 → SSH — the well-known control port for the File Transfer Protocol
4. What is port 25 → SMTP ? Junior A. the well-known port for sending email between mail servers B. the protocol that synchronizes clocks across networked devices on port 123 C. a UDP-based transport underpinning HTTP/3 with built-in encryption and multiplexing D. a protocol that encapsulates arbitrary Layer 3 packets inside IP for tunneling
5. Which term means: "the well-known port for sending email between mail servers"? Junior A. port 25 → SMTP B. NTP C. port 161 → SNMP D. port 636 → LDAPS
6. Which statement is correct? Junior A. port 25 → SMTP — the well-known port for LDAP secured with TLS B. port 25 → SMTP — the well-known port for sending email between mail servers C. port 25 → SMTP — a common non-privileged port for proxies and dev web servers D. port 25 → SMTP — the well-known port for SNMP polling of devices
7. What is port 21 → FTP ? Junior A. the legacy protocol that maps a MAC address to an IP address B. the well-known port for retrieving email while leaving it on the server C. the well-known port for encrypted remote shell access D. the well-known control port for the File Transfer Protocol
8. Which term means: "the well-known control port for the File Transfer Protocol"? Junior A. NTP B. QUIC C. RARP D. port 21 → FTP
9. Which statement is correct? Junior A. port 21 → FTP — the well-known port for encrypted remote shell access B. port 21 → FTP — the well-known control port for the File Transfer Protocol C. port 21 → FTP — the protocol that synchronizes clocks across networked devices on port 123 D. port 21 → FTP — a common non-privileged port for proxies and dev web servers
10. What is port 23 → Telnet ? Junior A. the protocol for monitoring and managing network devices, typically on port 161 B. the well-known port for unencrypted remote terminal access C. the well-known port for sending email between mail servers D. a common non-privileged port for proxies and dev web servers
11. Which term means: "the well-known port for unencrypted remote terminal access"? Junior A. port 143 → IMAP B. port 389 → LDAP C. port 23 → Telnet D. port 22 → SSH
12. Which statement is correct? Junior A. port 23 → Telnet — the well-known port for sending email between mail servers B. port 23 → Telnet — the well-known port for unencrypted remote terminal access C. port 23 → Telnet — the well-known port for encrypted remote shell access D. port 23 → Telnet — the protocol for monitoring and managing network devices, typically on port 161
13. What is port 3389 → RDP ? Junior A. the well-known control port for the File Transfer Protocol B. the well-known port for Microsoft Remote Desktop Protocol C. the well-known port for unencrypted remote terminal access D. the well-known port for encrypted remote shell access
14. Which term means: "the well-known port for Microsoft Remote Desktop Protocol"? Junior A. SNMP B. port 161 → SNMP C. port 3389 → RDP D. port 21 → FTP
15. Which statement is correct? Junior A. port 3389 → RDP — the protocol for monitoring and managing network devices, typically on port 161 B. port 3389 → RDP — the protocol used for error messages and diagnostics such as ping C. port 3389 → RDP — the well-known port for retrieving email while leaving it on the server D. port 3389 → RDP — the well-known port for Microsoft Remote Desktop Protocol
16. What is ARP ? Mid A. the well-known port for SNMP polling of devices B. the well-known port for unencrypted remote terminal access C. a protocol that encapsulates arbitrary Layer 3 packets inside IP for tunneling D. the protocol that resolves an IPv4 address to a MAC address on a local link
17. Which term means: "the protocol that resolves an IPv4 address to a MAC address on a local link"? Mid A. QUIC B. ICMP C. ARP D. port 143 → IMAP
18. Which statement is correct? Mid A. ARP — the protocol for monitoring and managing network devices, typically on port 161 B. ARP — the well-known port for retrieving email while leaving it on the server C. ARP — the legacy protocol that maps a MAC address to an IP address D. ARP — the protocol that resolves an IPv4 address to a MAC address on a local link
19. What is ICMP ? Mid A. the well-known port for retrieving email while leaving it on the server B. the protocol used for error messages and diagnostics such as ping C. the well-known port for LDAP secured with TLS D. the protocol for monitoring and managing network devices, typically on port 161
20. Which term means: "the protocol used for error messages and diagnostics such as ping"? Mid A. port 161 → SNMP B. ICMP C. port 143 → IMAP D. port 23 → Telnet
21. Which statement is correct? Mid A. ICMP — the well-known port for Microsoft Remote Desktop Protocol B. ICMP — a UDP-based transport underpinning HTTP/3 with built-in encryption and multiplexing C. ICMP — the well-known port for retrieving email while leaving it on the server D. ICMP — the protocol used for error messages and diagnostics such as ping
22. What is SNMP ? Mid A. a protocol that encapsulates arbitrary Layer 3 packets inside IP for tunneling B. the protocol that synchronizes clocks across networked devices on port 123 C. the protocol for monitoring and managing network devices, typically on port 161 D. the well-known port for SNMP polling of devices
23. Which term means: "the protocol for monitoring and managing network devices, typically on port 161"? Mid A. port 143 → IMAP B. port 389 → LDAP C. NTP D. SNMP
24. Which statement is correct? Mid A. SNMP — the well-known ports DHCP servers and clients use B. SNMP — a UDP-based transport underpinning HTTP/3 with built-in encryption and multiplexing C. SNMP — the protocol for monitoring and managing network devices, typically on port 161 D. SNMP — the well-known port for LDAP secured with TLS
25. What is NTP ? Mid A. the well-known port for directory service lookups B. the protocol for monitoring and managing network devices, typically on port 161 C. the well-known port for unencrypted remote terminal access D. the protocol that synchronizes clocks across networked devices on port 123
26. Which term means: "the protocol that synchronizes clocks across networked devices on port 123"? Mid A. port 143 → IMAP B. NTP C. ICMP D. port 161 → SNMP
27. Which statement is correct? Mid A. NTP — the protocol used for error messages and diagnostics such as ping B. NTP — the protocol that resolves an IPv4 address to a MAC address on a local link C. NTP — a protocol that encapsulates arbitrary Layer 3 packets inside IP for tunneling D. NTP — the protocol that synchronizes clocks across networked devices on port 123
28. What is port 143 → IMAP ? Mid A. the well-known port for sending email between mail servers B. the well-known port for retrieving email while leaving it on the server C. the well-known control port for the File Transfer Protocol D. the well-known port for LDAP secured with TLS
29. Which term means: "the well-known port for retrieving email while leaving it on the server"? Mid A. port 8080 → HTTP alternate B. QUIC C. port 143 → IMAP D. ICMP
30. Which statement is correct? Mid A. port 143 → IMAP — the well-known port for retrieving email while leaving it on the server B. port 143 → IMAP — the well-known port for sending email between mail servers C. port 143 → IMAP — the legacy protocol that maps a MAC address to an IP address D. port 143 → IMAP — the protocol used for error messages and diagnostics such as ping Showing 30 of 81 Ports & Protocols questions — the full set, with answers, explanations and an AI tutor on every question, is inside.