Technical data

collision
The condition in which two data packets are transmitted over a medium at the
same time, making both unintelligible.
common address notation
The common way of expressing an Internet address. The 32-bit address uses four
fields that are separated by periods; each field ranges from 0 to 255.
communications link
The physical medium connecting two systems.
communications server
A special-purpose standalone system dedicated to managing communications
activities for other computer systems.
concatenation
The process of joining two or more items together, as when input files are appended
to a new output file.
configuration database
The Compaq TCP/IP Services for OpenVMS database with SMTP, SNMP, and
TIME specifications.
congestion
The condition in which a network or part of a network is overloaded and has
insufficient communication resources for the volume of traffic.
connection
A logical communication path between two processes that are using the TCP
protocol.Thecommunicationpathmustexistbeforedatacanbesentineither
direction. A three-way handshake occurs between the requesting and receiving
process to establish a port through which the two processes communicate.
connection-oriented
The model of interconnection that consists of three phases: establish connection,
transfer data, and release connection. TCP is a connection-oriented protocol.
connectionless
The model of interconnection in which communication takes place without first
establishing a connection. UDP, IP, and IPX are connectionless protocols.
connectivity
The degree to which network nodes are interconnected. Full connectivity means all
nodes have links to every other node.
container file
A data file on a Compaq OpenVMS NFS server with a UNIX directory structure
and UNIX file attributes for a local, logical UNIX-style file system. Each UNIX
regular file is stored as a separate data file. The directory data files in the
containerfilecontaintheUNIXfilenamesandapointertothecorresponding
OpenVMS Files-11 data file.
container file system
A logical UNIX-style file system that resides on a Files-11 formatted disk and is
represented as a set of Files-11 files. See also container file.
contention
The condition when two or more stations attempt to use the same channel at the
same time.
Glossary–10