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.

Glossary-6