DTJ Number 3 September 1987 - Digital Technical Journals

Editorial StaffEditor - Richard W. BeaneProduction StaffProduction Editor - Jane C. BlakeDesigner - Charlotte BellInteractive Page Makeup -Terry ReedAdvisory BoardSamuel H. Fuller, ChairmanRobert M. GloriosoJohn W. McCredieJohn F. MucciMahendra R. PatelF. Grant SaviersWilliam D. StreckerThe Digital Technical journal is published by DigitalEquipment Corporation, 77 Reed Road, Hudson,Massachusetts 01749.Changes of address should be sent to DigitalEquipment Corporation, attention: Media ResponseManager, 200 Baker Ave ., CFO I-l/M94, Concord, MA01742.Comments on the content of any paper are welcomed.Write to the editor at Mail Stop HL0 2-3/Kl l at thepublished-by address. Comments can also be sent onthe ENET to RDVAX::BEANE or on the ARPANET toBEANE%RDV AX.DEC@DECWRL.Copyright © 1986 Digital Equipment Corporation.Copying without fee is permitted provided that suchcopies are made for use in educational institutions byfaculry members and are not distributed for commercialadvantage . Abstracting with credit of DigitalEquipment Corporation's authorship is permitted.Requests for other copies for a fee may be made to theDigital Press of Digital Equipment Corporation. Allrights reserved.The information in this journal is subject to changewithout notice and should not be construed as a commitmentby Digital Equipment Corporation. DigitalEquipment Corporation assumes no responsibiliry forany errors that may appear in this document.ISBN 1-55558-000-9Cover DesignTh is issue features networking products. Our cover depictsthe veins of a leaf as a visual metaphor fo r the connectionsin a network. As the leaf grows to support the flow of nutrients,so the local area network expands with extended LANs,gateways, and terminal servers to support the flow of info r­mation. The image was created using the Lightspeed system.1 he cover was designed by Deborah Falck and Eddie Lee ofthe Graphic Design Department.Documentation NumberEY-67 15 E-DPThe following are trademarks of Digital EquipmentCorporation: ALL-IN- I, DATATRIEVE, DDCMP, DEC,DECconnect, DEChealth, DECnet, DECnet-DOS,DECnet Router, DECnet RouterjX .25 Gateway,DECnet-RSX, DECserver, DECnetjSNA Gateway,DECnet-ULTRIX, DECnet-VAX, DEQNA, DEUNA, DigitalNetwork Architecture (DNA) , lAS, LANBridge, theDigital logo, MicroRSX, MicroVAX, MicroVMS, NMCC,NMCCjDECnet Monitor, PDP-8, PDP-11, PjFM,PROjDECnet, Q-bus, Rainbow, ReGIS, RSTS, RSX,RSX- IIM, RSX- IIM-PLUS, RSX- IIS, RX02, TELEPRO,ThinWire, TOPS- 10, TOPS-20, ULTRIX, ULTRIX-32,ULTRIX-32m, VAX, VAX- 11/730, VAX- 11/780,VAXcluster, VMS, VT, VT 100, VTI03, VT240, VT241,UNIBUSAT&T and UNIX are trademarks of American Telephone& Telegraph Company.IBM is a registered trademark of International BusinessMachines, Inc.Intel is a trademark of Intel Corporation.Lightspeed is a trademark of Lightspeed Computers,Inc.Motorola is a registered trademark of Motorola, Inc.MS is a trademark of Microsoft Corporation.Xerox is a registered trademark of Xerox Corporation.3COM is a trademark of 3COM Corporation.68000 is a trademark of Motorola, Inc.Book production was done by Educational ServicesMedia Communications Group in Bedford, MA.