Technical data

canonical name
The main or official name for a host; other names for the same host are aliases.
In a BIND configuration, you specify the canonical name in a CNAME record of
the
named.hosts
file.
category phrase
A BIND configuration logging statement phrase that specifies the different
categories for which to log messages. Categories include:
config
,
parser
,
queries
,
lame-servers
,
statistics
,
panic
,
update
,
ncache
,
xfer-in
,
xfer-out
,
db
,
eventlib
,
packet
,
cname
,
security
,
os
,
insist
,
maintenance
,
load
,
response-checks
,and
default
.
centralized management
A form of network management that manages from a single point in the network.
channel
The data path between two or more stations, including the communications control
capability of the associated stations.
channel phrase
A BIND configuration logging statement that specifies output methods, format
options, and severity levels associated with a category of messages to be logged.
checksum
A computed value based on the contents of a packet. The value is sent with the
packet when it is transmitted. The receiving host computes a new value based on
the received data. If the originating and receiving values are the same, the receiver
has a high degree of confidence that the data was received correctly.
circuit
A logical (virtual) link that provides a communications connection between
adjacent nodes.
class name
The name of an entity class. For example,
node
is the global entity class.
client
A computer system or process that requests a service of another computer service
or process.
client/server relationship
A model of interaction used in distributed processing products when a client
process sends a request and waits for the results from a server process.
clock
The combined hardware interrupt timer and software register that maintain
system time. In many systems, the hardware timer sends interrupts to the
operating system; at each interrupt, the operating system adds an increment to a
software register that contains the time value.
cluster alias
An optional node name and address used by some or all nodes in an OpenVMS
Cluster, allowing these nodes to be reachable on the network with the same address.
cluster failover environment
An environment that allows a system in a cluster to take on the responsibilities of
a system that crashed or is otherwise unavailable. For example, you can configure
a system to become a DHCP server when the primary DHCP server process
crashes or when the system that the primary DHCP server is running on becomes
unavailable.
Glossary–9