Default port number an administrator should know?

WSUS-8530 for HTTP

             8531 for HTTPS

DNS-53

DHCP-UDP 67 for Server

            UDP 68 for client

LDAP- 389

LDAPS- 636

SSH- 22

FTP- 21

TELNET- 23

SMTP- 25

TFTP- 69

KERBEROS- 88 TCP

POP3- 110

NTP- 123

HTTPS- 443

HTTP- 80

RDP- 3389

GLOBAL CATALOG- 3289

VMOTION- 8000