Open System Services NFS SCF Reference Manual

Glossary
Open System Services NFS SCF Reference Manual—522582-001
Glossary-3
Compaq NonStop Kernel Open System Services
(OSS).
range 192 through 255, the second octet is in the range 0 through 255, and the third octet
is in the range 0 through 255. The remaining octet in the address is used for the
subnetwork number and host number.
The subnetwork number varies in length. The subnetwork number’s width is typically
represented by a bit mask. The rest of the available bits uniquely identify the host
connected to the subnetwork. Local area networks (LANs) connected by way of a
gateway to the Internet get their subnetwork class from the Network Information Center
(NIC). The address classes of stand-alone, or entirely private, LANs are administered by
the LAN administrator. The typical usage is to have all Class A Internet addresses for
private LANs.
Compaq NonStop Kernel Open System Services (OSS). The product name for the OSS
environments. See also Open System Services (OSS)
.
Compaq NonStop TCP/IP. Transmission Control Protocol over Internet Protocol that runs
on a Compaq NonStop Himalaya system. Conventional NonStop TCP/IP, formerly
named Tandem TCP/IP, uses the conventional NonStop TCP/IP stack. Parallel Library
TCP/IP uses parallel TCP/IP protocol stacks implemented as a Shared Runtime Library
(SRL) on the NonStop Kernel operating system.
connection. The path between two protocol modules that provides reliable stream delivery
service. In the Internet, a connection extends from a Transmission Control Protocol
(TCP) module on one system to a TCP module on another system.
connectionless service. A characteristic of the packet delivery service offered by most
hardware and by the Internet Protocol (IP). The connectionless service treats each packet
or datagram as a separate entity that contains the source and destination address.
Usually, connectionless services can drop packets or deliver them out of sequence.
core gateway. One of a set of gateways operated by the Internet Network Operations Center
(INOC) at Bolt, Baranek, and Newman (BBN). Gateways in the core system exchange
routing updates periodically to ensure that their routing tables remain constant. The core
forms a central part of Internet routing, because all groups must advertise paths to their
networks to core gateways using the Exterior Gateway Protocol (EGP).
CSMA. See carrier sense multiple access (CSMA)
.
CSMA/CD. See carrier sense multiple access with collision detection (CSMA/CD)
.
DARPA. Defense Advanced Research Projects Agency. Formerly Advanced Research
Projects Agency (ARPA).
directory. In an NFS fileset, a file that contains a list of other files, including other directories
that are below it in the hierarchy. Entries in a directory file are called links. Each
directory contains at least two links,. (dot) and.. (dot-dot). The link called “dot” points
to the directory itself, and the link called “dot-dot” points to the parent.
domain. In the Internet, a part of the naming hierarchy. Syntactically, a domain name consists
of a sequence of names (labels) separated by periods (dots).