Security+ Ports & Protocols
None of the Security+ text books seem to provide a comprehensive list of the ports and protocols you need to know for the exam, so I put one together for you. Yes, you need to memorize these. Knowing these forward and back will allow you to quickly answer several exam questions.TCP/UDP Port# Protocol Secure?
| TCP | 20 | File Transfer Protocol (FTP) Data | No |
| TCP | 21 | FTP Control Commands | No |
| TCP | 22 | Secure Shell (SSH) | Yes |
| Secure Copy Protocol (SCP) | Yes | ||
| Secure File Transfer Protocol (SFTP) | Yes | ||
| TCP | 23 | Telnet | No |
| TCP | 25 | Simple Mail Transfer Protocol (SMTP) | No |
| TCP | 49 | Terminal Access Controller Access Control System (TACACS+) | Yes |
| TCP | 53 | Domain Name Server (DNS) | No |
| UDP | 53 | DNS Queries and Responses | No |
| UDP | 69 | Trivial File Transfer Protocol (TFTP) | No |
| TCP | 80 | Hypertext Transfer Protocol (HTTP) | No |
| TCP | 88 | Kerberos | Yes |
| UDP | 88 | Kerberos | Yes |
| TCP | 110 | Post Office Protocol (POP3) | No |
| TCP | 123 | Network Time Protocol | No |
| TCP | 137 | NetBIOS Windows | No |
| UDP | 137 | NetBIOS Windows Name Registration & Resolution | No |
| UDP | 138 | NetBIOS Datagram Distribution Service | No |
| TCP | 139 | NetBIOS Connection-Oriented Sessions | No |
| TCP | 143 | Internet Message Access Protocol (IMAP) | No |
| UDP | 161 | Simple Network Management Protocol (SNMP) | No |
| UDP | 162 | SNMP Trap | No |
| TCP | 389 | Lightweight Directory Access Protocol (LDAP) | No |
| UDP | 389 | Lightweight Directory Access Protocol (LDAP) | No |
| TCP | 443 | Secure Sockets Layer (SSL) | Yes |
| Transport Layer Security (TLS) | Yes | ||
| HTTPS (Uses SSL or TLS) | Yes | ||
| TCP | 445 | Later NetBIOS | Yes |
| TCP | 465 | Secure SMTP (SSMTP or SMTPS) | Yes |
| UDP | 500 | IPSec Internet Key Exchange (IKE) | Yes |
| TCP | 636 | Secure Lightweight Directory Access Protocol (LDAP SSL/TLS) | Yes |
| TCP | 990 | File Transfer Protocol Secure (FTPS) | Yes |
| TCP | 993 | Internet Message Access Protocol Secure (IMAP SSL/TLS) | Yes |
| TCP | 995 | Post Office Protocol (POP3 SSL/TLS) | Yes |
| TCP | 1433 | Microsoft SQL Server | Yes |
| UDP | 1701 | Layer 2 Tunneling Protocol (L2TP) | Yes |
| TCP | 1723 | Point-to-Point Tunneling Protocol (PPTP) | Yes |
| UDP | 1812 | RADIUS Authentication and Authorization | Yes |
| UDP | 1813 | RADIUS Accounting (connection time) | Yes |
| TCP | 3389 | Remote Desktop Protocol (RDP) | Yes |
| UDP | 3389 | Remote Desktop Protocol (RDP) | Yes |
| TCP | 3868 | Diameter | Yes |
| UDP | 10161 | Simple Network Management Protocol (SNMP) Secure | Yes |
| UDP | 10162 | Simple Network Management Protocol Trap (SNMP) Secure | Yes |
