User Manual

Version 3.03 SPEEDLAN 9000 Series Installation and Operation User Guide

Glossary-6

European Standard also used in South American nations, among others. Speed is 2.048 Mega bits per

second (Mb/s). Uses the G.703 data interface.

Elevation

1. Height above sea level. 2. The vertical angle in degrees between the ground and the direction the antenna

is pointed.

Encryption

The method of converting data into a form that cannot be understood by unauthorized people. Encryption is

very important when using wireless communication because wireless circuits are easier to tap into than

wireless circuits. There is also strong encryption, which means ciphers are used to make uncoding the signal

almost impossible, unless you have the decryption keys.

ESD

Electro-Static Discharge happens when there is a transfer between objects at diverse voltages.

Ethernet

This is the most popular physical layer LAN technology in use today. Other LAN types include Token Ring,

Fast Ethernet, Fiber Distributed Data Interface (FDDI), Asynchronous Transfer Mode (ATM) and Local Talk.

Ethernet is popular because it strikes a good balance between speed, cost and ease of installation. These

benefits, combined with wide acceptance in the computer marketplace, create the ability to support virtually

all-popular networks and make Ethernet an ideal networking technology for most computer users today. The

Institute for Electrical and Electronic Engineers (IEEE) defines the Ethernet as IEEE Standard 802.3. This

standard defines rules for configuring an Ethernet, as well as specifying how elements in an Ethernet network

interact with one another. By adhering to the IEEE standard, network equipment and network protocols will

communicate efficiently.

Ethernet Switch

This device helps expand the Ethernet network. LAN switches can link four, six, ten or more networks together,

and have two basic architectures. This switch “cuts through” and “stores and forwards” as well. This

technique takes more time to examine the entire packet, but it allows the switch to catch certain packet errors

and keep them from propagating through the network. A switch also operates between the DataLink and

Network Layer of the OSI model. It reads the MAC address and will either bridge it to the Physical Layer or

route to the Network Layer.