GlossaryCSX400 and CSX400-DC User’s Guide 253IP — Internet protocol. A network layer protocol which allows a packet to traverse multiplenetworks on the way to its final destination.IP Address — Internet address. A 32-bit address assigned to devices that participate in a networkusing TCP/IP. An IP address consists of four octets separated with periods defining network,optional subnet and host sections.IPX (Internet Packet Exchange) — A proprietary Network layer protocol developed by Novelland used in NetWare networks.ISDN — Integrated Services Digital Network. Digital transmission standard definingcommunication protocols permitting telephone networks to carry data, voice, fax and otherstreams.Leased Line — A telecommunications line between two service points leased from acommunications carrier for private use, usually incurring a monthly service rate.LEDs (Light Emitting Diodes) — Type of indicator lights on the panel of a device.Local Area Network (LAN) — A network connecting computers over a relatively smallgeographic area (usually within a single campus or building).MAC Layer/Address — Media Access Control layer/address defined by the IEEE 802.3specification which defines media access including framing and error detection. Part of the OSIreference model Data Link layer.Metric — An algorithm used by routers to determine the best path for transmitting packets to aremote destination based on considerations such as time, delay, cost, etc.Modem — Modulator/Demodulator. A device that converts digital signals to/from analog signalsfor transmission over analog communications lines.Multi-Link Protocol — A protocol, defined in RFC 1717, that defines a way to perform inversemultiplexing on the TCP/IP point-to-point protocol (PPP); i.e., the ability to use multiple serialWAN channels for transferring one datastream. With MLP, a user can send and receive data overboth B channels in an ISDN basic-rate interface connectionNAT — Network Address Translation uses a unique IP address for a WAN interface. This IPAddress is negotiated through PPP or assigned statically by the Internet Service Provider (ISP).NAT reduces the number of unique IP addresses for all clients using a particular WAN interface toone.
