My students often ask about the common TCP\/IP port numbers that they need to know for Microsoft certification exams. A lot depends on the exam you are taking. For example, for Active Directory exam it will be helpful to know the ports that Active Directory uses.<\/p>\n
In general, here are some of the common TCP\/IP port\u00a0 numbers that are good to know. For a more detailed list download the PDF document\u00a0TCP\/IP Port Numbers<\/a>.<\/p>\n TCP 20<\/strong> FTP (File Transfer Protocol – Data)<\/p>\n TCP 21<\/strong> FTP (File Transfer Protocol – Control)<\/p>\n TCP 22<\/strong> SSH (Secure Shell – Remote login protocol)<\/p>\n TCP 23<\/strong> Telnet<\/p>\n TCP 25<\/strong> SMTP (Simple Mail Transfer Protocol)<\/p>\n TCP 53<\/strong> DNS (Domain Name System)<\/p>\n TCP 67<\/strong> BOOTPS (Bootstrap Protocol Server)<\/p>\n TCP 68<\/strong> BOOTPC (Bootstrap Protocol Client)<\/p>\n TCP 80<\/strong> HTTP (HyperText Transport Protocol)<\/p>\n TCP 88<\/strong> Kerberos<\/p>\n TCO 110<\/strong> POP3 (Post Office Protocol 3)<\/p>\n TCP 119<\/strong> NNTP (Network News Transfer Protocol)<\/p>\n TCP 123<\/strong> NTP (Network Time Protocol)<\/p>\n TCP 137<\/strong> NetBIOS (NETBIOS Name Service)<\/p>\n TCP 138<\/strong> NetBIOS (NETBIOS Datagram Service)<\/p>\n TCP 139<\/strong> NetBIOS (NETBIOS Session Service)<\/p>\n TCP 143<\/strong> IMAP (Internet Mail Access Protocol)<\/p>\n TCP 161<\/strong> SNMP (Simple Network Management Protocol)<\/p>\n TCP 389<\/strong> LDAP (Lightweight Directory Access Protocol)<\/p>\n TCP 443<\/strong> HTTPS (HTTP secure – used for SSL)<\/p>\n Additional Resources:<\/strong><\/p>\n IANA-Assigned Service Name and Port Numbers Registry<\/a><\/p>\n