Lantronix MPS100 EPS Reference Manual - Page 211

Local Area Transport. LAT is a Digital Equipment Corporation proprietary

Page 211 highlights

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

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223

Glossary
LAT
Glossary-
3
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
.
LAT
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.
login service
Created when the Server is configured to allow users to log in from the network
(as opposed to logging in from the serial ports).
MAU
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.
MOP
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.
MTU
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.
multicast
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.