The amount of data that can be transmitted in a specific period of time over an Ethernet.
Discrete data units, or packets, into which the terminal server gathers into slots characters for each session destined for the same port. The characters are then placed into a single Ethernet message packet called a datagram.
A node on the Ethernet that offers services.
Groups are logical subnetworks set by the System Administrator through the terminal server's interface. They are defined by decimal integers from 0 to 255. Groups are used to control communications between service nodes and their services and terminal server ports.
In a LAT network, nodes, or the network communication points, consist of terminal servers and service nodes.
The software that implements the LAT protocol. Its presence is the only feature that defines a LAT node. LAT server software, downloaded from a VAX, runs on the terminal server. LAT host software runs on the host. 4DLT is LAT software that runs on the IRIS host.
Directing new connections to the node with the most available resources. New connection requests are automatically routed to the service with the highest rating. A service node's rating drops as its resources are used up. If multiple service nodes offer the same service, new connection requests are automatically directed to the node with the most available resources. 4DLT does not dynamically change its service rating.
The latd daemon implements the LAT protocol and creates the remote terminal processes upon request by the terminal server.
The process by which a message is addressed and sent to a set of logically related nodes, which, for the LAT network, are terminal servers.
The ability to combine accumulated user data from simultaneous sessions into a single packet or datagram. Multiplexing is performed by the terminal server and host LAT software.
A service is a named resource that LAT hosts provide to network users.
An Ethernet multicast message from a service node that announces the services offered by the node.
Each service is identified by a service name of from 1 to 16 characters. The 4DLT System Administrator creates service names, which are displayed on the user's terminal in response to the terminal server's show services command. Service names are the names that network users specify when issuing the terminal server's connect command.
A host or server on the network that offers one or more services that are accessible to users on terminal servers. Any IRIS system running 4DLT is a service node.
A LAT session is an asynchronous, two-way logical connection between a service node and a terminal server. This connection enables a terminal server user (or device) to exchange data with the host over a shared virtual circuit. The terminal display for the user who logs in to a host via a terminal server is the same as if the terminal were connected directly to the host.
A message segment within the virtual circuit that manages and exchanges data with the session.
A dedicated Ethernet communications device that provides LAT connections between its ports and the LAT nodes. A terminal server is a special-purpose computer that at a minimum runs LAT terminal server software.
A logical communication path between a terminal server and a host. The LAT transport mechanism is a virtual circuit.