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Appendix B Common Services
NBG6604 User’s Guide
115
TACACS
UDP
49
Login Host Protocol used for (Terminal Access
Controller Access Control System).
TELNET
TCP
23
Telnet is the login and terminal emulation protocol
common on the Internet and in UNIX environments. It
operates over TCP/IP networks. Its primary function is
to allow users to log into remote host systems.
TFTP
UDP
69
Trivial File Transfer Protocol is an Internet file transfer
protocol similar to FTP, but uses the UDP (User
Datagram Protocol) rather than TCP (Transmission
Control Protocol).
VDOLIVE
TCP
7000
Another videoconferencing solution.
Table 42 Commonly Used Services (continued)
NAME
PRO TO C O L
PO RT(S)
DESC RIPTIO N