Perle Systems TS2, DS1 manual Glossary

Glossary

This chapter provides definitions for IOLAN terms.

BOOTP (BOOTstrap An Internet protocol that enables a diskless workstation to discover its own IP address, the IP

Protocol)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	A TCP/IP protocol that provides static and dynamic address allocation and management.
Configuration
Protocol)
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	A series of commands sent to the modem by a communications program at start up. These
String	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	A communication control character sent by the receiving destination indicating that the last
Acknowledgment)	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	A protocol for managing network devices.
Network Management
Protocol)
Subnet/Prefix Bits	Identifies the devices IP address, which portion constitutes the network address and which
	portion constitutes the host address.

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