HP Digital NetRider Instrukcja Użytkownika Strona 510

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Glossary-6
event logging
This is a process of recording significant occurrences on the network.
failover
LAT
. A failure-recovery function provided by LAT software. Failover occurs when a
user’s current LAT session is disrupted by the failure of the service node. Failover
attempts to connect the user to the same service on an alternative
service node
. Failover
is attempted only if the service is offered by two or more service nodes (as with a
VAXcluster service).
flow control
The set of rules used by a communications protocol to ensure that access server ports
and port devices do not lose data during data transfers. Flow control prevents the
sending network node (or transmitting process) from sending more data than the
receiving node (or receiving process) can handle.
gateway
See
Internet gateway
.
group codes
LAT
. Group codes are integers ranging from 0 to 255. They are assigned to
LAT
services
, access servers, and access server ports.
heartbeat
A signal generated by certain Ethernet transceivers. The signal verifies that the
collision detection circuitry is operational.
host
A multiuser computer.
host-initiated request
LAT
. A connection request from a computer asking a access server to initiate a session.
The session connects an applications device such as a printer on a access server port to
an application such as a print queue on the computer.
ICMP
Internet Control Message Protocol
. A protocol that is the part of the Internet Protocol
that
gateways
and
hosts
use to communicate control and error information. If for any
reason a gateway cannot forward or deliver a
datagram
, or if the gateway detects
unusual conditions that may affect the host, the gateway uses this protocol to
communicate with the host so that the host can take corrective action.
ID
This is an abbreviation for identification.
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