Technical data

services database
The Compaq TCP/IP Services for OpenVMS database created by default that
contains one entry for each service configured.
Simple Mail Transfer Protocol (SMTP)
An Internet standard protocol for transferring electronic mail messages from one
machine to another; specifies how two mail systems interact and the format of
control messages they exchange to transfer mail.
Simple Network Management Protocol (SNMP)
The network management protocol of choice for TCP/IP-based internets; allows
remote monitoring and management of network devices (particularly routers and
servers) from across an Internet.
simplex
An interface may be marked as simplex either by the kernel or by the interface
configuration. A simplex interface is an interface on a broadcast medium that is
not capable of receiving packets it broadcasts.
The GATED daemon takes advantage of interfaces that are capable of receiving
their own broadcast packets to monitor whether an interface appears to be
functioning properly.
skew
A measure, in Hertz, of the difference between the actual frequency of a clock and
what its frequency should be to keep perfect time. See also drift.
slave server
A name server that has no access to the Internet and relies on forwarder servers to
resolve queries that it cannot resolve locally. As slave servers receive information
from forwarder servers, they store that information in their cache. See also cache
server, forwarder server, primary server,andsecondary server.
slew
To adjust gradually the time of a clock until it tells the correct time. Compare
with step.
SLIP
See Serial Line Internet Protocol
SMI
See Structure of Management Information.
SMTP
See Simple Mail Transfer Protocol.
SNMP
See Simple Network Management Protocol.
socket
The endpoint of communication to which an IP address and port may be bound.
When writing an application, it is a data structure that is part of the Internet
pseudodevice created every time an OpenVMS process assigns a communication
channel. The other part of the Internet pseudodevice is the device socket.
socket API
An application programming interface for implementing TCP/IP protocols.
Sometimes called Berkeley Sockets indicating where the API was developed.
Glossary–42