TCP Ports
A TCP port defines a location for the delivery of TCP connection data. Included in each TCP segment is the source port that indicates the Application Layer process from which the segment was sent, and a destination port that indicates the Application Layer process to which the segment was sent. There are port numbers that are assigned by the Internet Assigned Numbers Authority (IANA) to specific Application Layer protocols.
Table 10-1 shows assigned TCP port numbers used by components of Windows Server 2008 and Windows Vista.
Table 10-1. Well-Known TCP Port Numbers
Port Number | Application Layer Protocol |
|---|---|
20 | FTP Server (data channel) |
21 | FTP Server (control channel) |
23 | Telnet Server |
25 | Simple Mail Transfer Protocol (SMTP) |
69 | Trivial File Transfer Protocol ... |
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