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186 Networking and Other Equipment

Datacommunications Tutorial

■ What are networking products?

Networking products consist of

active (powered) communications

devices such as Ethernet switches and

routers, protocol converters and

copper to fiber media converters.

■ How are networking products used?

These products are used to connect

users and devices to a network. Other

uses include extending the distance

of a network and translating

protocols between two different

network types.

■ Where are networking

products used?

Networking products are used

in many voice, video and data

communications applications

including Ethernet networks,

video surveillance, Internet access

applications, and for monitoring and

controlling devices in process and

automation industries.

Datacommunications Terms

Asynchronous Transfer Mode (ATM): Ve r y

high speed network utilizing SONET optical

transmission methods through the public

telecommunications system.

Baseband Transmission: A transmission

method where direct current signals are

placed directly onto the transmission medium

(cable). Ethernet is a baseband network type,

hence, the “Base” in 10Base-T, etc.

Baud Rate: A measure of signal changes per

second. Commonly used to rate the speed of

a modem.

Bridge: A networking component that links

two or more network segments. Bridges are

used to split busy networks into separate, less

congested segments.

Broadband Transmission: A transmission

method where multiple channels are

modulated onto separate carrier frequencies.

The result is multiple communications

channels that occupy specific frequency ranges.

Bus: Also called a "Daisy Chain". A network

topology where each node is connected to

one another in line. A major disadvantage is

that when there is a break in the bus the

entire network goes down.

Client Server: A network architecture where

multiple user workstations (Clients)

communicate with backend servers through

a network. Clients are fully operating systems

that are capable of processing data.

CODEC: An acronym for COder/DECoder. A

device used for converting analog signals to

digital signals. For example, telephone

companies use codecs to convert binary

signals transmitted on their digital networks

to analog signals converted on their analog

networks.

Converter: A device used to convert one

transmission media to another (Ex.

Fiber/Copper Media Converter). Converters

are usually externally powered as they

physically “repeat” or regenerate the signal.

CSMA: (See Basic Ethernet Theory - right).

Ethernet: (See What is Ethernet? - below).

Fiber Distributed Data Interface (FDDI): A

100Mbps fiber optic cabling standard

developed by ANSI. FDDI utilizes a dual

counter rotating ring topology for network

redundancy.

Hub: A network device that receives a signal

from one station and retransmits to all other

connected stations.

Local Area Network (LAN): A network that

remains within one facility (department,

office, building, campus).

MODEM: An acronym for

MOdulator/DEModulator. Modems are data

communications devices that convert digital

signals to analog signals for transmission

over analog public telephone networks.

Network Interface Card (NIC): Network

devices that are installed in computers so that

they can be connected to a network. Ethernet

NICs come in different speeds as well as with

connections to different media types.

Node: A device or station connected to a network.

Peer to Peer: A network architecture where

computers connect directly with other

computers without the need for servers.

Redundancy: Utilizing multiple access

methods so that if one goes down the systems

still operate.

Repeater: A network device that regenerates

the signal to increase a cabling run.

Router: A network device that interconnects

networks. Routers provide traffic control and

filtering functions, they are commonly used

to connect a LAN to the Internet.

Server: A computing device that provides a

service to users on a network (clients). An

example is a file server that stores and

maintains documents for retrieval.

Small Computer System Interface (SCSI): A

peripheral interface that is used to connect

devices to a computer.

Star: The most common network topology

where each node is connected to a central

point. Advantageous because if one part of the

star is lost the network remains intact.

Switch: A switch is a multiport bridge that

segregates different portions of a network for

faster network access (See Basic Ethernet

Theory - right).

Synchronous Optical Network (SONET): A

Bellcore and ANSI standard that defines

transmission of synchronous and time

sensitive (ex: real time video) information.

SONET provides a way for worldwide

carriers to connect equipment.

Token Ring: A networking standard that

utilizes a ring topology. Information is put

onto the ring which is then passed (Token

Passing) to the different stations. The amount

of time that a station possesses the token is

variable which gives some users priority on

the network. Token Ring was standardized by

IEEE under the 802.5 standard.

Transceiver: A device used to change one

media type to another. Transceivers usually

get their power from the NIC.

Wide Area Network (WAN): A network that

spans a greater distance and needs the

involvement of a public carrier.

Shop at L-com.com or call 1-800-343-1455 E-mail: [email protected] Fax: 978-689-9484

What is Ethernet?

In the early 1980s, Digital Equipment Corporation, Intel and Xerox

developed the Ethernet Local Area Networking format. This

technology was soon accepted by the IEEE Committee, creating the

802.3 standard. This standard dictates the use of CSMA/CD (Carrier

Sense Multiple Access with Collision Detection) as its accessing

scheme. Networks use a variety of NICs (Network Interface Cards),

hubs, transceivers, converters, repeaters & switches, as well as

different types of transmission media for carrying signals.

• Accessing Scheme:CSMA/CD - Carrier sense multiple access

with Collision Detection.

• Speed:10Mbps/100Mbps/1000Mbps (1 GBps).

• Network Architecture:Coax Bus,UTP Star,Fiber Star

10BASE-T

100BASE-T

1000BASE-T

RJ45 JACK

10BASE-FL

100BASE-FX

1000BASE-X

Dual Fiber SC

PLUG

100FX

1000BASE-X

Dual Fiber LC

PLUG

Connectors Commonly Used in Ethernet Environments

2K7_MV2_NW&Test_Intro.qxd 08/14/07 12:02 PM Page 186

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Podsumowanie treści

Strona 1 - Datacommunications Tutorial

186 Networking and Other EquipmentDatacommunications Tutorial What are networking products?Networking products consist ofactive (powered) communicati

Strona 2 - Basic Ethernet Theory

Wireless Networking Terms802.11a: An IEEE standard for wireless Ethernetnetworking that operates in the 5 GHz radio band(ISM frequency band) and uses

Strona 3

196 Networking and Other Equipment > Planet Wireless and PoE EquipmentItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-mail:

Strona 4 - PRODUCTS

NETGEAR® Wireless Networking > Networking and Other Equipment 197L-com®CONNECTIVITYPRODUCTSItem # Description List PriceShop at L-com.com or call

Strona 5

198 Networking and Other Equipment > Hirschmann Industrial Ethernet EquipmentItem # Description List PriceShop at L-com.com or call 1-800-343-1455E

Strona 6

Hirschmann Industrial Ethernet Equipment > Networking and Other Equipment 199L-com®CONNECTIVITYPRODUCTSItem # Description List PriceShop at L-com.

Strona 7 - How auto-negotiation works

200 Networking and Other Equipment > Digi Device Servers and Console ServersItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-

Strona 8 - 100% satisfaction guaranteed

Aboundi, Lava and Passport Networks Device Servers > Networking and Other Equipment 201L-com®CONNECTIVITYPRODUCTSItem # Description List PriceShop

Strona 9 - Network Interface Cards

202 Networking and Other Equipment > Protocol Converters and Line DriversItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-mai

Strona 10 - We want to help you!

ICP DAS USA PLCs, Protocol Converters & Switches > Networking and Other Equipment 203L-com®CONNECTIVITYPRODUCTSItem # Description List PriceSh

Strona 11 - Certifications

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Strona 12 - Testimonials

Networking and Other Equipment 187L-com®CONNECTIVITYPRODUCTSWhat is the difference between standard/fast Ethernet and switched/shared equipment?This c

Strona 13

L-com Cable Testers > Networking and Other Equipment 205L-com®CONNECTIVITYPRODUCTSItem # Description Code List PriceShop at L-com.com or call 1-80

Strona 14 - Free technical support

206 Networking and Other Equipment > Network / Cable Test EquipmentItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-mail: sal

Strona 15

Fiber Optic Testers > Networking and Other Equipment 207L-com®CONNECTIVITYPRODUCTSItem # Description List PriceShop at L-com.com or call 1-800-343

Strona 16 - Technical resources

208 Networking and Other Equipment > Professional Testers and AccessoriesItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-mai

Strona 17 - RoHS status

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Strona 18 - Same day shipping

UTP20058TUTP20108UTP20028T-2188 Networking and Other Equipment > Metrobility and Unicom Media ConvertersItem # Description Maximum Segment Length L

Strona 19 - See The Video

Planet, Unicom, Transition Networks Media Converters > Networking and Other Equipment 189L-com®CONNECTIVITYPRODUCTSItem # Description Maximum Segm

Strona 20 - L-com Exclusive

190 Networking and Other Equipment > Planet Ethernet SwitchesItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-mail: sales@L-c

Strona 21

NETGEAR NAS Solutions and Ethernet Switches> Networking and Other Equipment 191L-com®CONNECTIVITYPRODUCTSItem # Description List PriceShop at L-co

Strona 22 - -com.com/FAQS

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Strona 23

Cable / DSL Routers > Networking and Other Equipment 193L-com®CONNECTIVITYPRODUCTSItem # Description List PriceShop at L-com.com or call 1-800-343

Strona 24

194 Networking and Other Equipment > Network Interface CardsItem # Description List PriceShop at L-com.com or call 1-800-343-1455E-mail: sales@L-co

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INSTRUCTION BOOK

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