ZyXEL Communications XGS4700-48F - Page 468

Appendix A Common Services
XGS4700-48F User’s Guide
468
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 173 Commonly Used Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION