Protocol Common function Port No Python module
- HTTP Web pages 80 httplib, urllib, xmlrpclib
- NNTP Usenet news 119 nntplib
- FTP File transfers 20 ftplib, urllib
- SMTP Sending email 25 smtplib
- POP3 Fetching email 110 poplib
- IMAP4 Fetching email 143 imaplib
- Telnet Command lines 23 telnetlib
- Gopher Document transfers 70 gopherlib, urllib