Protocol and Port Numbers

Protocol	Port Number
FTP (Data Transfer)	20
FTP (Command Control)	21
SSH	22
Telnet (Unencrypted msges)	23
SMTP (simple mail transfer protocol)	25
DNS	53
DHCP	67,68
HTTP	80
POP3 (post office protocol)	110
NNTP(NETWORK NEWS TRANSFER PROTOCOL)	119
NTP (NETWORK TIME PROTOCOL)	123
IMAP(Internet message access protocol)	143
SNMP (simple network management protocol)	161
IRC	194
HTTPS	443
RADIUS	1812