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B. Glossary
CHAP – Challenge-Handshake Authentication Protocol. A form of authentication
between iSCSI Initiators and Targets. See One-Way CHAP and Mutual CHAP.
Crossover Cable – A network cable that crosses the transmit and receive lines.
Typically used to connect computers directly together, i.e. computers that are NOT
connected via a hub, switch or router.
Firewall – The primary method for keeping a computer secure from intruders. A
firewall allows or blocks traffic into and out of a private network or the user’s
computer. Firewall’s can be implemented via software or hardware, e.g. a router.
Gateway – A computer/router that acts as a go-between for two or more networks. In
this case, the gateway functions as an entry/exit point to the network.
IP Address – Internet Protocol Address. The address of a device attached to an IP
network (TCP/IP network). Every client, server and network device must have a
unique IP address for each network connection.
iSCSI – Internet SCSI. An Internet Protocol that serializes SCSI commands and
converts them to TCP/IP (Ethernet).
iSCSI Host Computer – Computer that contains your iSCSI Initiator.
iSCSI Target – For the purpose of this document, the iSCSI Target refers to your
iS5xx iSCSI Bridge.
LED – Light Emitting Diode. A semiconductor device that emits visible light when
an electric current passes through it.
LVD – Low Voltage Differential. Type of signal transmission used by SCSI. LVD
supports cable lengths of up to 25 meters.
MAC Address – Media Access Control Address. The unique serial number burned
into Ethernet devices (e.g. Paralan’s iS5xx iSCSI Bridge) that identifies each device
from all others.
Management Computer – Computer used to access the iS5xx iSCSI Bridge’s Web-
based Utility for configuration.
Mutual CHAP – Username and Secret for both the Target (iS5xx iSCSI Bridge) and
the Initiator. When the Initiator contacts the iS5xx iSCSI Bridge, the Initiator must
provide the correct Secret, then if the password is correct, the iS5xx will provide the
Return Secret that the Initiator requires, which was set in the iS5xx when Mutual
CHAP was turned on in the Web Based Utility. In this way, both the Initiator and the