ZyXEL Communications ZyWALL 2 Plus User Manual page 656

Appendix D Common Services
Table 238 Commonly Used Services (continued)
NAME
TELNET
TFTP
VDOLIVE
656
PROTOCOL PORT(S)
TCP 23
UDP 69
TCP 7000
DESCRIPTION
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.
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).
Another videoconferencing solution.
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