HP Rp3440-4 - 9000 - 0 MB RAM Programmer's Manual page 192

Glossary
processes executing on the
same node and using the
AF_UNIX socket address
family.
User Datagram Protocol: A
protocol that provides the
underlying communication
support for datagram sockets.
UDP is an unreliable protocol.
A process receiving messages
on a datagram socket could find
that messages are duplicated,
out-of-sequence or missing.
Messages retain their record
boundaries and are sent as
individually addressed
packets. There is no concept of
a connection between the
communicating sockets.
Virtual Terminal Proto-
col: A protocol that provides
terminal access to interactive
services on remote hosts (e.g.,
telnet(1)).
192 Glossary