Terminology For Chapter 1 & 2

Front 1

1000BaseSX

Back 1

The implementation of Gigabit Ethernet running over mulitmode filber-optic cabel (instead of copper twisted pair) usesshort wavelength laser.

Front 2

1000Base-TX

Back 2

Most commonly known as Gigabit Thernet, allows 1000Mbps throughput on standard twisted-pair copper cabling rated at Category 5c or higher.

Front 3

Attenuation

Back 3

The degradation of a signal over distance that affects the propogation of waves and signals in electrical circuits, optical fibers, as well as in the air.

Front 4

Backbone

Back 4

A generalized term defining a primary cable or system that connects networks together.

Front 5

Baseband Signaling

Back 5

Digital signaling that has only one signal on the cable at a time. The signals are in one of three states - one, zero, or idle.

Front 6

Broadband Signaling

Back 6

A type of signaling that sends multiple signals (channels) over the cable at the same time. The best example of broadband signaling is cable television. The zero, one and idle states exitst on multiple channels on the same cable.

Front 7

Bus Topology

Back 7

A configuration wherein all computers connect to the network via a central bus calbe called a backbone.

Front 8

Coaxial Cabling

Back 8

A type of cable used in network wiring used in 10Base2 and 10Base5. The cable has a single solid-core of copper surrounded by a plastic sheath and shielded with a copper/tin mesh.

Front 9

Crossover Cable

Back 9

Cable use to connect two computers together via NICs without the use of a hub.

Front 10

Crosstalk

Back 10

A type of interference that occurs when two LAN cables run lose to each other. If one cable is carrying a signal and the other isn't, the one carrying a signal will induce a "ghost" signal in the other cable.

Front 11

Fiber-Optic Cable

Back 11

A high-speed channel for transmitting data, made of high-purity glass sealed with an opaque tube, faster than convertional copper wire such as coaxial cable.

Front 12

Full-Duplex

Back 12

Describes any device that can send and receive data simultaneously.

Front 13

LAN (Local Area Network)

Back 13

A group of PC's connected together viz cabling, radio, or infrared that use this connectivity to share resources such as printers and mass storage.

Front 14

Mesh Topology

Back 14

Mesh topolgy is not in common in computer networking. With Mesh topoolgy, every workstation has a connection to every other component of the network.

Front 15

OSI Model

Back 15

A standard defined by the International Standards Organization to categorize the process of network commuication between cojputers in terms of Layers

Front 16

Patch Panel

Back 16

A central wiring point for multiple devices on a network, which contains no electronic circuits. Usually they are in server rooms or located near switches or hubs to provide an easy means of patching over wall jacks or hardwire.

Front 17

Ring Topology

Back 17

A network topology that connects the computers in a circular fashion. If one computer fails, the entire network fails, so this topology is rarely used.

Front 18

RJ-11

Back 18

A modular connection mechanism that allows for as many as 4 copper wires. Used primarily in telephone connections.

Front 19

RJ-45

Back 19

A modular connection mechanism that allows for as many as 8 copper wires. Used primarily in network interface connections.

Front 20

RS-232

Back 20

A port on a computer that is typically 9-pins and uses Serial communication. Being phased out by USB

Front 21

Shielded Twisted Pair (STP)

Back 21

A popular cabling for networks composed of pairs of wires twisted around each other at specific intervals. The twists serve to reduce interference. The more twists, the less interference. The cable has metalic shielding to protect the wires from external interference. Older Token Ring networks are the only common network technology that uses this cabling.

Front 22

Straight-through Cable

Back 22

A cable used to connect a host to a switch or hub. Both ends of the cable use the same wiring pinout.

Front 23

Unshielded Twisted Pair (UTP) cabling

Back 23

A popular type of cabling for telephone and networks, composed of pairs of wires twisted around each other at specific intervals, The twists serve to reduce interference (also called crosstalk). The more twists, the less interference. The cable has no metallic shielding to protect the wires from external interference, unlike its cousin, STP

Front 24

VLAN

Back 24

A technology that allows users on different switch ports to participate in their own network separate from, but still connected to, the other stations on the same or connected swith.

Front 25

VPN

Back 25

A network that uses the public internet as a backbone for a private interconnection (network) between locations.