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IOLAN DS1/TS2 CLI Reference Guide, Version 4.3
90
Glossary
This chapter provides definitions for IOLAN terms.
BOOTP (BOOTstrap 
Protocol)
An Internet protocol that enables a diskless workstation to discover its own IP address, the IP 
address of a BOOTP server on the network, and a file to be loaded into memory to boot the 
machine. This enables the workstation to boot without requiring a hard or floppy disk drive.
Community (SNMP)
An SNMP community is the group that devices and management stations running SNMP belong 
to. It helps define where information is sent.
DHCP (Dynamic Host 
Configuration 
Protocol)
A TCP/IP protocol that provides static and dynamic address allocation and management.
Direct Connection
Connections that bypass the IOLAN enabling the user to log straight into a specific host. A 
direct connection is recommended where a user logging into the IOLAN is not required. 
Ethernet
A high-speed (10Mbps,100Mbps) cable technology that connects devices to a LAN, using one 
or more sets of communication protocols.
Local Authentication
Uses the user ID and password stored within the IOLAN User database. 
Modem Initialization 
String 
A series of commands sent to the modem by a communications program at start up. These 
commands tell a modem how to set itself up in order to communicate easily with another 
modem.
MOTD
Message of the day. This is defined by a file whose contents display when users log into the 
IOLAN.
Multicast
The broadcasting of messages to a specified group of workstations on a LAN, WAN, or internet.
NAK (Negative 
Acknowledgment)
A communication control character sent by the receiving destination indicating that the last 
message was not received correctly.
Reverse Connection
Connections that originate from a host that go directly to a serial device through the IOLAN.
Silent Connection
Silent connections are the same as direct connections except that they are permanently 
established. The host login prompt is displayed on the screen. Logging out redisplays this 
prompt. Silent connections, unlike direct connections, however, make permanent use of pseudo 
tty resources and therefore consume host resources even when not in use.
SNMP (Simple 
Network Management 
Protocol)
A protocol for managing network devices.
Subnet/Prefix Bits
Identifies the devices IP address, which portion constitutes the network address and which 
portion constitutes the host address.