Appendix E Common Services
B222s User’s Guide
251
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 89 Commonly Used Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION
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