Dengan banyaknya port-port yang ada didunia networking yang beberapa harus kita hafalkan berikut saya lampirkan beberapa port dan fungsinya yang banyak dipakai dan tidak asing didunia networking..


ftp-data 20/tcp #File Transfer [Default Data]
ftp-data 20/udp #File Transfer [Default Data]
ftp 21/tcp #File Transfer [Control]
ftp 21/udp #File Transfer [Control]
ssh 22/tcp #Secure Shell Login
ssh 22/udp #Secure Shell Login
telnet 23/tcp
telnet 23/udp
domain 53/tcp #Domain Name Server
domain 53/udp #Domain Name Server
tftp 69/tcp #Trivial File Transfer
tftp 69/udp #Trivial File Transfer
http 80/tcp www www-http #World Wide Web HTTP
http 80/udp www www-http #World Wide Web HTTP
rtelnet 107/tcp #Remote Telnet Service
rtelnet 107/udp #Remote Telnet Service
pop2 109/tcp postoffice #Post Office Protocol - Version 2
pop2 109/udp postoffice #Post Office Protocol - Version 2
pop3 110/tcp #Post Office Protocol - Version 3
pop3 110/udp #Post Office Protocol - Version 3
auth 113/tcp ident tap #Authentication Service
auth 113/udp ident tap #Authentication Service
sftp 115/tcp #Simple File Transfer Protocol
sftp 115/udp #Simple File Transfer Protocol
imap 143/tcp imap2 imap4 #Interim Mail Access Protocol v2
imap 143/udp imap2 imap4 #Interim Mail Access Protocol v2
snmp 161/tcp
snmp 161/udp
snmptrap 162/tcp snmp-trap
snmptrap 162/udp snmp-trap
hueheheheehe.... tulisannya semrawut habis gak tau sintaxnya gimana biar rapi mungkin ada yang bisa bantu aku..:P