Lantronix MPS100 EPS Reference Manual - Page 211
Local Area Transport. LAT is a Digital Equipment Corporation proprietary
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Glossary LAT login service MAU MOP MTU multicast LAT many other nodes and networks a node can "see" on its network, addresses are either assigned to nodes (in the case of large, cross-country networks) or chosen randomly (for small networks that do not connect to the outside world). Each software address should be unique across all the networks it can access. See network address. Local Area Transport. LAT is a Digital Equipment Corporation proprietary network communication protocol. The protocol is based on the idea of a relatively small, known number of hosts on a local network sending small network packets at regular intervals. LAT will not work on a wide area network scale as TCP/IP does, as it cannot distinguish large numbers of nodes. For local networks, however, LAT is usually faster and less prone to pauses than TCP/IP. LAT also allows remote connections to services and other network devices, about which TCP/IP has no understanding. The fact that the Server supports both LAT and TCP/IP protocols transparently means that you are not bound by the limitations of either protocol. Created when the Server is configured to allow users to log in from the network (as opposed to logging in from the serial ports). Medium Attachment Unit. This is a small device used as a transceiver between a Thinwire network cable and an AUI cable or a Thickwire cable and an AUI cable. It consists of the physical adapter as well as the circuitry needed to convert signals from one medium to the other. Maintenance Operations Protocol. MOP is a Digital protocol for Ethernet network traffic. The protocol is used for remote communications between hosts and devices on the network. Terminal servers use this protocol to download code from a host quickly and easily. For networks where LAT and MOP are the dominant network services, MOP is the simplest way to boot the Server. At boot time, the Server broadcasts a request on the network for a load file, and a MOP host will respond and send the file. MOP is also used to signal the Server of an NCP request or connection from another host, and is the protocol that TSM is based on. Maximum Transmission Unit. The MTU of a link is the maximum packet size, in bytes, that can be transmitted across the link. For Ethernet, this is 1536 bytes. For SLIP lines, it can be variable, based on each host's ability to receive and reassemble packets. The RFC for SLIP suggests an MTU of 1006 bytes, but this is not a requirement. A message that is sent out to multiple devices on the network by a host. Multicasts are generally sent at specified intervals to avoid cluttering the network, and in the case of LAT, contain the name of the host sending them as well as information about what LAT services that host provides. Glossary-3