socket.getservbyport

socket.getservbyport(port, protocolname)

• This function translates a port number and protocol name to an internet service name
• This is the opposite of getservbyname
• The port represents the port number (e.g. 21)
• The protocolname represents tbe protocol name (e.g. tcp)
• The protocolname should be tcp or udp

Example of getservbyport

>>> import socket
>>> socket.getservbyport(21, 'tcp')
'ftp'

References

• Python Essential Reference
• Documentation for socket API