3Com 16985ua.bk manual Loop, Multicast, Protocol, Repeater, Router, Segment

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52GLOSSARY

loop

An event that occurs when two network devices are connected by

 

more than one path, thereby causing packets to repeatedly cycle

 

around the network and not reach their destination.

MAC

Media Access Control. A protocol specified by the IEEE for determining

 

which devices have access to a network at any one time.

MAC address

Media Access Control address; also called hardware or physical address.

 

A layer 2 address associated with a particular network device. Most

 

devices that connect to a LAN have a MAC address assigned to them

 

as they are used to identify other devices in a network. MAC addresses

 

are 6 bytes long.

MDI

Medium Dependent Interface. An Ethernet port connection where the

 

transmitter of one device is connected to the receiver of another

 

device.

MDI-X

Medium Dependent Interface Cross-over. An Ethernet port connection

 

where the internal transmit and receive lines are crossed.

multicast

A packet sent to a specific group of endstations on a network.

NIC

Network Interface Card. A circuit board installed in an endstation that

 

allows it to be connected to a network.

POST

Power On Self Test. An internal test that a Switch carries out when it is

 

powered-up.

protocol

A set of rules for communication between devices on a network. The

 

rules dictate format, timing, sequencing and error control.

repeater

A simple device that regenerates LAN traffic so that the transmission

 

distance of that signal can be extended. Repeaters are used to connect

 

two LANs of the same network type.

router

A device that provides WAN links between geographically separate

 

networks.

RPS

Redundant Power System. A device that provides a backup source of

 

power when connected to a Switch.

segment

A section of a LAN that is connected to the rest of the network using a

 

switch or bridge.

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Contents SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents PIN -OUTS Page Page About this Guide Icon Description ConventionsConvention Description Related DocumentationYear ComplianceComments ProductIntroducing the Switch 3300 MM About SuperStack Switch 3300 MM Summary of FeaturesSwitch 3300 MM Front View Detail Switch 3300 MM front viewColor Indicates Port Status LEDs Power/Self Test LEDUnit LEDs Switch 3300 MM Rear View Detail Power SocketUnits on Configuration Switch 3300 MM as aNetwork ExamplesSwitch Using the Switch as a collapsed backboneUsing the Switch in a desktop environment Fast Ethernet configuration rules Configuration Rules with Full Duplex Introducing the Switch 3300 MM Installing the Switch Rack-mounting Repeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack mountingStacking Units Treated as a single manageable unit with one IP addressStacking Units Stack of three units Power-up Powered-up and ready for operationSwitch 3300 MM SequenceChoosing Correct CablesPort, you need a cross-over cable. Most of the 10BASE-T Color StateProblem Switch Network. For information on managing the Switch usingManaging GuideSafety Information Information Important SafetyPersonnel only Important Safety Information ’information de Sécurité ImportantePersonnel qualifié Étroites’information de Sécurité Importante Wichtige Sicherheitsinformat ionen Null Modem Cable PC-AT Serial CablePin to RS-232 25-pin Pin to 9-pinConnectors Pin Number Signal FunctionModem Cable RJ45 PinPin Number Signal Function Appendix B PIN-OUTS Physical Dimensions SafetyPower Supply Environmental RequirementsVlan MIB RFC Services Online TechnicalUsername anonymous Europe, South Africa, and Middle East Country Telephone Number Asia, Pacific RimCountry Telephone Number Fax Number Glossary Broadcast CollisionEndstation EthernetLine speed See baud Loop MulticastProtocol RepeaterServer StackSuperStack TelnetGlossary Index Index 3Com Corporation Limited Warranty Page Disclaimer Regulatory Notices

16985ua.bk specifications

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