Cabletron Systems bridges, switches - page 128

SIMM to Switch

Glossary-10

SIMM Single In-line Memory Module. A collection of Random Access Memory

(RAM) microprocessors which are placed on a single, replaceable printed

circuit board. These SIMMs may be added to some devices to expand the

capacity of certain types of memory.

Single Attached Connected to an FDDI network through a single cable which does not

provide for auto-wrap functions.

Single Mode A type of ﬁber optics in which light travels in one predeﬁned mode, or

wavelength. Signals in single mode ﬁber optics are typically driven by

lasers. The use of lasers and the transmission characteristics of single

mode ﬁber optics allow the media to cover greater distances than

multimode ﬁber optics.

SMA Sub-Miniature Assembly. A modular connector and port system used in

multimode ﬁber optic cabling. The SMA connector is threaded, and is

screwed into an SMA port.

Spanning Tree A mathematical comparison and decision algorithm performed by

Ethernet bridges at power-up. Spanning tree detects the presence of data

loops and allows the bridges to selectively activate some ports while

others remain in a standby condition, avoiding the data loops and

providing redundant paths in the event of bridge failures.

SQE Signal Quality Error. A self-monitoring test performed by some Ethernet

equipment which examines the status of the device at arbitrary and

predeﬁned intervals.

ST Straight-Tip. A modular connector and port system used with both

multimode and single mode ﬁber optic cabling. The ST connector utilizes

an insert and twist-lock mechanism.

Station See node.

STP Shielded Twisted Pair. Refers to a type of cabling, most commonly used in

Token Ring networks, which consists of several strands of cables

surrounded by foil shielding, which are twisted together. See also UTP.

Straight-Through A length of multi-stranded cable in which the transmit wire(s) of one end

is/are passed directly through the cable to the same location on the other

end. Straight-through cables are used for most facility cabling. See also

crossover.

Switch A network device which connects two or more separate network

segments and allows trafﬁc to be passed between them when necessary. A

switch determines if a packet should be blocked or transmitted based on

the destination address contained in that packet.

Contents

Main Page i Notice Notice Page Contents Contents iv Chapter 5 Network Design Chapter 8 Token Ring Chapter 7 Fast Ethernet Chapter 6 Ethernet Appendix A Charts and Tables Page 1-1 Chapter 1 Introduction Using This Guide Cabletron Systems Networking Guide - MMAC-FNB Solutions Document Organization Introduction Document Conventions 1-3 Document Conventions Additional Assistance Warnings and Notications Formats Related Documentation Chapter 2 Review of Networking 2-2 Ethernet Ethernet Fast Ethernet 2-3 Fast Ethernet 2-4 Fast Ethernet Token Ring 2-5 Token Ring 2-6 Token Ring Token Ring 2-7 2-8 Token Ring Page Page Chapter 3 The Workgroup Approach Standalones 3-2 Standalones Standalones, the Original Networking Devices Standalones 3-3 Management of Standalones Limitations of Standalones 3-4 Stackables Stackables physical organization logical organization Stackables 3-5 How Stacks Work HubSTACK Interconnect Cable REAR VIEW SEHI Managing 4 SEH Non-Intelligent Hubs 3-6 Stackables Intelligence in the Stack Internetworking for Stacks Stackables 3-7 Limitations of Stacks 3-8 Stackables 4-1 Chapter 4 PIMs and BRIMs PIM Port Interface Modules Device 4-2 Port Interface Modules EPIM-F2 Port Interface Modules 4-3 4-4 Port Interface Modules Port Interface Modules 4-5 4-6 Port Interface Modules Port Interface Modules 4-7 4-8 Bridge/Router Interface Modules Bridge/Router Interface Modules Types of BRIMs Bridge/Router Interface Modules 4-9 Page 5-1 Chapter 5 Network Design The following chapter discusses some of the more common approaches to workgroup network design. 5-2 The Role of the Workgroup Cabletron Systems Networking Guide - MMAC-FNB Solutions. The Role of the Workgroup Workgroup Establishment Criteria Page The Role of the Workgroup 5-5 Page Page 5-8 The Role of the Workgroup The Role of the Workgroup 5-9 Selecting Workgroup Technologies 5-10 Creating a Manageable Plan Creating a Manageable Plan Logical Layout Creating a Manageable Plan 5-11 5-12 Creating a Manageable Plan Fault Aversion Creating a Manageable Plan 5-13 5-14 Creating a Manageable Plan Network Maps and Record Keeping Network Expandability 5-15 Network Expandability 5-16 The Workgroup as the Network The Workgroup as the Network The Workgroup in the Larger Network The Workgroup in the Larger Network 5-17 What Is a Backbone? Methods of Conguring Backbones 5-18 The Workgroup in the Larger Network Page Page The Workgroup in the Larger Network 5-21 Choosing Backbone Technologies Page Chapter 6 Ethernet 6-2 Ethernet Workgroup Devices Ethernet Workgroup Devices Ethernet Workgroup Devices 6-3 6-4 Ethernet Workgroup Devices Switched Devices Ethernet Workgroup Design 6-5 Ethernet Workgroup Design The Home Ofce 6-6 Ethernet Workgroup Design Ethernet Workgroup Design 6-7 6-8 Ethernet Workgroup Design Ethernet Workgroup Design 6-9 6-10 Ethernet Workgroup Design Ethernet Workgroup Design 6-11 The Small Ofce 6-12 Ethernet Workgroup Design Ethernet Workgroup Design 6-13 6-14 Ethernet Workgroup Design Ethernet Workgroup Design 6-15 6-16 Ethernet Workgroup Design The Remote Ofce Ethernet Workgroup Design 6-17 6-18 Ethernet Workgroup Design Ethernet Workgroup Design 6-19 The High-End Department WAN (56K) 6-20 Ethernet Workgroup Design Ethernet Workgroup Design 6-21 6-22 Ethernet Workgroup Design Ethernet Workgroup Design 6-23 6-24 Ethernet Workgroup Design Permutations 7-1 Chapter 7 Fast Ethernet Fast Ethernet Workgroup Devices 7-2 Fast Ethernet Workgroup Devices Switched Devices Fast Ethernet Workgroup Design 7-3 Fast Ethernet Workgroup Design Small Ofces 7-4 Fast Ethernet Workgroup Design Fast Ethernet Workgroup Design 7-5 7-6 Fast Ethernet Workgroup Design High-End Department Fast Ethernet Workgroup Design 7-7 7-8 Fast Ethernet Workgroup Design Fast Ethernet Workgroup Design 7-9 Fast Ethernet as a Backbone 7-10 Fast Ethernet Workgroup Design Fast Ethernet Workgroup Design 7-11 7-12 Fast Ethernet Workgroup Design 8-1 Chapter 8 Token Ring Token Ring Workgroup Devices 8-2 Token Ring Workgroup Devices Token Ring Workgroup Design 8-3 Token Ring Workgroup Design Small Ofce 8-4 Token Ring Workgroup Design Token Ring Workgroup Design 8-5 8-6 Token Ring Workgroup Design Token Ring Workgroup Design 8-7 Page A-1 Appendix A Charts and Tables Workgroup Design Tables Ethernet A-2 Workgroup Design Tables Fast Ethernet Workgroup Design Tables A-3 Token Ring A-4 Workgroup Design Tables PIMs and BRIMs Workgroup Design Tables A-5 A-6 Workgroup Design Tables Networking Standards and Limitations A-7 Networking Standards and Limitations Ethernet A-8 Networking Standards and Limitations Fast Ethernet Networking Standards and Limitations A-9 Token Ring A-10 Networking Standards and Limitations Networking Standards and Limitations A-11 FDDI Page Glossary Page Page Page Page Page Page Page Page Page Page Page Index-1 Index Numerics A B C H I N P R