65
TFTP
Trivial File Transfer Protocol - A simple file transfer protocol (a simplified version of
FTP) that is often used to boot diskless workstations and other network devices
such as routers over a network (typically a LAN).VCI
U
UDP
User Datagram Protocol - A connectionless transport protocol that runs on top of
TCP/IP's IP. UDP, like TCP, uses IP for delivery; however, unlike TCP, UDP
provides for exchange of datagrams without acknowledgments or guaranteed
delivery. Best suited for small, independent requests, such as requesting a MIB
value from an SNMP agent, in which first setting up a connection would take more
time than sending the data.
UNI signaling
User Network Interface signaling for ATM communications.
V
Virtual Channel Identifier
Identifies virtual channels between users or between users and networks.
Virtual Connection (VC)
A link that seems and behaves like a dedicated point-to-point line or a system that
delivers packets in sequence, as happens on an actual point-to-point network. In
reality, the data is delivered across a network via the most appropriate route. The
sending and receiving devices do not have to be aware of the options and the route
