Port 21
FTP
Port 110
POP - Post Office Protocol
Port 143
IMAP - Internet Message Access Protocol
Port 443
HTTPS
Port 3389
RDP
Port 20
FTP
Port 23
Telnet
Port 25
SMTP - Simple Mail Transfer Protocol
Port 53
DNS
Port 80
HTTP
Port 389
LDAP - Lightweight Directory Access Protocol
Port 445
SMB - Server Message Block (SMB) is a protocol used to provide shared access to files, printers, and other network resources.
Port 137 and 139
NetBT
Port 162
SNMP - A Simple Network Management Protocol (SNMP) trap is unrequested information being sent from an SNMP agent, in this case running on a managed switch.