Cabletron Systems HSIM-W6 用户手册

HSIM-W6 User’s Guide 237

Internet address. A 32-bit address assigned to devices that participate in a network 

using TCP/IP. An IP address consists of four octets separated with periods defining network, 
optional subnet and host sections.

A proprietary Network layer protocol developed by Novell 

and used in NetWare networks.

Integrated Services Digital Network. Digital transmission standard defining 

communication protocols permitting telephone networks to carry data, voice, fax and other 
streams.

A telecommunications line between two service points leased from a 

communications carrier for private use, usually incurring a monthly service rate.

Type of indicator lights on the panel of the router.

A network connecting computers over a relatively small 

geographic area (usually within a single campus or building).

Media Access Control layer/address defined by the IEEE 802.3 

specification which defines media access including framing and error detection. Part of the OSI 
reference model Data Link layer.

An algorithm used by routers to determine the best path for transmitting packets to a 

remote destination based on considerations such as time, delay, cost, etc.

Modulator/Demodulator. A device that converts digital signals to/from analog signals 

for transmission over analog communications lines.

A protocol, defined in RFC 1717, that defines a way to perform inverse 

multiplexing on the TCP/IP point-to-point protocol (PPP); i.e., the ability to use multiple serial 
WAN channels for transferring one datastream. With MLP, a user can send and receive data over 
both B channels in an ISDN basic-rate interface connection.

Network Address Translation uses a unique IP address for a WAN interface. This IP 

address 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, 
to one.

A Network Operating System developed by Novell, Inc. providing shared access to 

files and other network services.