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1992-02-06
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#ε
üÅtroduction ëüáüεions
äidcc01
äidcc02
äidcc03
äidcc04
äidcc05
#äidcc01
üáüεions Overview
▓
Çüâ103.1.1.Çé.1
Çüâ103.1.1.Çå.1
Çüâ103.1.1.Çä.1
Çüâ103.1.1.Çç.1
#äidcc02
üáüεions üôlements
▓
Çüâ103.2.1.Çé.1
Çüâ103.2.1.Çå.1
Çüâ103.2.1.Çä.1
Çüâ103.2.1.Çô.1
Çüâ103.2.1.Ǭ.1
Çüâ103.2.1.Çσ.1
Çüâ103.2.1.Ç▐.1
Çüâ103.2.1.ÇΣ.1
Çüâ103.2.1.j.1
Çüâ103.2.1.k.1
Çüâ103.2.1.Çε@.1
Çüâ103.2.1.m.1
Çüâ103.2.1.n.1
Çüâ103.2.1.o.1
Çüâ103.2.1.p.1
Çüâ103.2.1.Çε5.1
Çüâ103.2.1.r.1
Çüâ103.2.1.Çí.1
Çüâ103.2.1.t.1
#äidcc03
üáüεions üítandards
▓
Çüâ103.3.1.Çé.1
Çüâ103.3.1.Çå.1
Çüâ103.3.1.Çä.1
Çüâ103.3.1.Çç.1
Çüâ103.3.1.Çô.1
Çüâ103.3.1.Ǭ.1
Çüâ103.3.1.Çσ.1
#äidcc04
üΓüônvironments
▓
Çüâ103.4.1.Çé.1
Çüâ103.4.1.Çå.1
Çüâ103.4.1.Çä.1
Çüâ103.4.1.Çç.1
Çüâ103.4.1.Çô.1
Çüâ103.4.1.Ǭ.1
Çüâ103.4.1.Çσ.1
Çüâ103.4.1.Ç▐.1
Çüâ103.4.1.ÇΣ.1
Çüâ103.4.1.j.1
Çüâ103.4.1.k.1
Çüâ103.4.1.Çε@.1
Çüâ103.4.1.m.1
#äidcc05
üåridges ìüσateways
▓
Çüâ103.5.1.Çé.1
Çüâ103.5.1.Çå.1
Çüâ103.5.1.Çä.1
Çüâ103.5.1.Çç.1
Çüâ103.5.1.Çô.1
Çüâ103.5.1.Ǭ.1
#Çüâ103.1.1.Çé.1
üé
ü«îàε ôlements èéεions û?
üé.■two Γs, éεions path, ìé message
üå.■two Γs ì two εGs
üä.■éíender, é receiver, ìé medium
üç.■éεP» transmits á, éçestination εP»
■receives áìéεions path εàm
#Çüâ103.1.1.Çå.1
üä
üïêÇòÇñ╘ganization »çevelops εions
ítandards?
üé.■ÇäCITT
üå.■ÇôIA
üä.■Ç█CII
üç.■ÇΣEEE
#Çüâ103.1.1.Çä.1
üä
ÇäCITT makes "¢" Çì "ü╓" recommendations £Åternational
εions. üï¿ê⌐?
üé.■"ü¢" ítandards î£ telegraph äircuits Åcluding εGs.
üå.■"ü¢" ítandards î£ telephone äircuits ôxcluding εGs.
üä.■"ü╓" ítandards î£ public áÖs.
üç.■"ü╓" ítandards î£Ç╓ON/╓OFF ÇεGäontrol.
#Çüâ103.1.1.Çç.1
üå
üàÇ█CII Çäode αs ôight ε(ë represent ▀äharacter.
ü«çecimal ε?êôquivalent ë 01101011 ε ?
üé.■153
üå.■107
üä.■701
üç.■351
#Çüâ103.2.1.Çé.1
üç
üéíynchronous 2400 εεGεé▐igher ε7n rate
than ñ█ynchronous 2400 εεGæcause
üé.■àíynchronous εGαs éälock £íynchronization
üå.■àíynchronous εGùçetect ε'ôrrors
üä.■àíynchronous εGêε@ess prone ëôrrors
üç.■à█ynchronous εGµ transmit éítart ìítop
■ε'½▀äharacter £íynchronization
#Çüâ103.2.1.Çå.1
üç
üàεG modifies éçigital íignal ëäarry á over é phone
ε@ine ╙ähanging àäarrier íignal
üé.■émplitude ┌
üå.■¬requency ┌
üä.■phase ┌
üç.■émplitude, ¬requency ╘ phase
#Çüâ103.2.1.Çä.1
üå
üÅôcho ôrror ähecking, à receiver ôchoes ▀äharacter █
Æê received. üïêéíerious çisadvantage ëôchoplexing?
üé.■üàôntire message µæ resent Θon çetection èñ
■ôrror.
üå.■üÆêΣmpossible ë tell Åïçirection ñôrror
■ε occurred.
üä.■üà receiver ùnot çetect ôrrors.
üç.■üàíender çetermines whether äharacters î╒pleting
■àäycle äorrectly.
#Çüâ103.2.1.Çô.1
üç
üïε3 media ê╒posed è¬our parts: éäenter
äonductor, é plastic Åsulation, ñ outer äonductor ìñ
outer äoating?
üé.■twisted pair ε>
üå.■¬iber optic ε>
üä.■íhielded twisted pair ε>
üç.■äoaxial ε>
#Çüâ103.2.1.Ǭ.1
üä
üïêéÇçCE ÇεP?
üé.■é terminal
üå.■é personal Γ
üä.■éεG
üç.■é mainframe
#Çüâ103.2.1.Çσ.1
üé
üïε=è terminal εows à¥ëçirectly utilize à
εTäapabilities èéäentral Γ?
üé.■éçumb terminal
üå.■éímart terminal
üä.■ñÅtelligent terminal
üç.■é personal Γ
#Çüâ103.2.1.Ç▐.1
üç
ü█ynchronous εGs ù transmit ╪ípeeds
üé.■ε 300 ε
üå.■º 300 ë 2400 ε
üä.■º 300 ë 4800 ε
üç.■º 300 ë 9600 ε
#Çüâ103.2.1.ÇΣ.1
üä
üíynchronous εGs σenerally transmit ╪ípeeds ranging º
üé.■300 εë 600 ε
üå.■1200 εë 4800 ε
üä.■1200 εë 19.2 Kbps
üç.■1200 εë 9600 ε
#Çüâ103.2.1.j.1
üä
üïüεüítandard εGêäapable èε2íynchronous ì
█ynchronous operation?
üé.■üε 103
üå.■üε 201
üä.■üε 212üé
üç.■üε 209
#Çüâ103.2.1.k.1
üç
üïüεüítandard εGêäapable è 9600 εíynchronous
operation?
üé.■üε 103
üå.■üε 201
üä.■üε 208
üç.■üε 209
#Çüâ103.2.1.Çε@.1
üå
üïêé popular εGäapable èéuto-çial ìéuto-└?
üé.■üε 103
üå.■ü▐ayes ╒patible
üä.■üε 212üé
üç.■üε 201
#Çüâ103.2.1.m.1
üé
üé null εGêéεP»
üé.■äonnects εIÇçTE'Çííend äircuit ëà other'í receive
■äircuit
üå.■εéuto-└åut òéuto-çial
üä.■εò▐ave äarrier çetect äircuitry
üç.■êܽéüáphone
#Çüâ103.2.1.n.1
üä
ü«ε=èäonnection ê required £ transmission ébove 9600
ε╪ε@ong çistances?
üé.■¢oice σrade ε@ines
üå.■çirect ε@ink
üä.■áσrade ε@ines
üç.■üôthernet ε>
#Çüâ103.2.1.o.1
üç
üïεPεows íeveral ¡ëíhare éíingle
εions ε@ine ╪Ñce?
üé.■ítatistical εG
üå.■microwave repeater
üä.■╒mon äarrier
üç.■multiplexer
#Çüâ103.2.1.p.1
üä
üïε=è multiplexing █signs ▀çigital íignal ëé
íeparate ¬requency åut íends εíignals through é╒mon
ähannel?
üé.■ítatistical multiplexing
üå.■τçivision multiplexing
üä.■¬requency çivision multiplexing
üç.■¢oice ¬requency telegraph
#Çüâ103.2.1.Çε5.1
üå
üïε=è multiplexing removes εIεH╪éτº▀
íignal Å turn, ì╒bines àm Åto é╒mon áítream £
transmission?
üé.■ítatistical multiplexing
üå.■τçivision multiplexing
üä.■¬requency çivision multiplexing
üç.■¢oice ¬requency telegraph
#Çüâ103.2.1.r.1
üé
üïε=è multiplexing prioritizes τ█signments,
Σgnoring Σdle ähannels ì providing édditional τílots ë
éctive ähannels éccording ë need?
üé.■ítatistical multiplexing
üå.■τçivision multiplexing
üä.■¬requency çivision multiplexing
üç.■¢oice ¬requency telegraph
#Çüâ103.2.1.Çí.1
üç
üïε=èεions äircuit would αà¬ollowing
RS-232 pin █signments: Transmitted üá, Transmit üälock,
Received üá, Received üälock, üíignal üσround, üôxternal üälock,
üíignal üε5uality üçetector?
üé.■█ynchronous ▐alf çuplex
üå.■íynchronous ▐alf çuplex
üä.■█ynchronous ¬ull çuplex
üç.■íynchronous ¬ull çuplex
#Çüâ103.2.1.t.1
üé
üïε=èεions äircuit would αà¬ollowing
RS-232 pin █signments: Transmitted üá, Received üá,
Request ëíend, üälear ëíend, üáε6 ready, üá terminal
ready, üáäarrier çetect, Ring Ådicator?
üé.■ü▐ayes ╒patible εG
üå.■üítatistical Mux
üä.■üε 201
üç.■üε 208
#Çüâ103.3.1.Çé.1
üç
ü«εàÇ█CII Çäode αàôighth ε'£?
üé.■äapital ε@etters
üå.■ε@etters/¬igures íhift
üä.■ípecial äharacters
üç.■parity
#Çüâ103.3.1.Çå.1
üä
ü«êéÖ╦re ╒posed è?
üé.■Γs, transceivers ìüôthernet ε>s
üå.■Éös, ╫ns ì∞s
üä.■protocols, £mats ìíequences è operations
üç.■Γs, εGs ìÇε
#Çüâ103.3.1.Çä.1
üä
ü«εàüÖüε@ayer èà open ûÅterconnection
model ço?
üé.■üÆåreaks à message çown Åto íegments.
üå.■üÆ█signs ▀íegment éähecksum.
üä.■üÆçivides àíegments Åto ímaller units äalled packets.
üç.■üÆíends à message ëàüíession üε@ayer.
#Çüâ103.3.1.Çç.1
üé
üï¿╬àüáüε@ink üε@ayer èà open û
Återconnection model ê⌐?
üé.■üÆäalculates éähecksum £▀ packet.
üå.■üÆêàôlectronic ε@ink ëà transmission.
üä.■üÆ transmits à message, █éítream èε(.
üç.■üÆ maintains ì terminates àäonnection £
■transmission.
#Çüâ103.3.1.Çô.1
üé
üïÖ╦re αs ÇíDLC transmission protocol?
üé.■ÇíNA
üå.■ÇíAN
üä.■UNA
üç.■Ç╓NS
#Çüâ103.3.1.Ǭ.1
üå
üï¿╬ü╓.25 █éε@ayered protocol ê⌐?
üé.■üÆê recommended ╙ÇôIA.
üå.■üÆäonsists èàε@owest three ÇεFI model Çε@ayers.
üä.■üÆ was Åtroduced ╙ÇΣBM ÇÅ 1972.
üç.■üÆαs ÇíDLC Çε'╘iented á▐andling.
#Çüâ103.3.1.Çσ.1
üä
üà most popular transmission protocols »α█ynchronous
transmission î
üé.■Ç▐DLC ÇìÇíDLC
üå.■ÇåSC ÇìÇíDLC
üä.■ü╓modem ì Kermit
üç.■ü╓.25 ì TCP/ÇΣP
#Çüâ103.4.1.Çé.1
üå
üÖs α¢arious ε=s èáεTítrategies.
üï¿ê⌐?
üé.■üéΓûÅï▀ΓεÆs own
■εTê using äentralized εT.
üå.■üÅεLεT, àΓêÜë process
■εL transactions.
üä.■üçistributed εTûs î more prone ë
■¬ailure íince εD▐ave ío many εT points.
üç.■üÅteractive εTê¬aster than εLεT.
#Çüâ103.4.1.Çå.1
üå
üï¿╬à mainframe ônvironment êÇòÇ⌐?
üé.■üà▐ost ╘ mainframe performs à main áεT
■tasks £àΓû.
üå.■üàεion äontroller äontrols ε@ocal
■εions ½in éσroup èÅput/output εPs.
üä.■üé 3278 εPêäalled éäluster ûäonsisting è
■terminals, ∞s ìäluster äontrollers.
üç.■Remote εions ëìºà mainframe î
■äontrolled ╙àεions äontroller.
#Çüâ103.4.1.Çä.1
üç
üï¿╬Öing êÇòÇ⌐?
üé.■üû/370 êñÇΣBM mainframe Çû.
üå.■3274 êéäluster äontroller.
üä.■3745 êéεions äontroller.
üç.■3705 êé∞.
#Çüâ103.4.1.Çç.1
üç
üï¿╬Öing êÇòÇ⌐?
üé.■30Ç╓X ÇêñÇΣBM mainframe model.
üå.■3725 êéεions äontroller.
üä.■3174 êéäluster äontroller.
üç.■3178 êé∞.
#Çüâ103.4.1.Çô.1
üä
üï¿╬Öing êÇòÇ⌐?
üé.■üé▐ost êà main Γ.
üå.■üé node êéεPäonnected ëà▐ost.
üä.■üéíession êé permanent physical äonnection ε
■à▐ost ìéε@ocal terminal.
üç.■üà two major εPs Üεà▐ost ì nodes
■îéεions äontroller ì/╘éäluster
■äontroller.
#Çüâ103.4.1.Ǭ.1
üç
üï¿╬Öing êÇòÇ⌐?
üé.■Minicomputers îíometimes Ü█ípecialized nodes
■Åé mainframe Ö.
üå.■üé minicomputer äontroller ùæédded ëé
■minicomputer ûë▐andle more terminals ╨à
■ε?è terminals à▐ost ù▐andle çirectly εæen
■ôxceeded.
üä.■üàÇ▐P 3000 ÇûÅcludes é range èΓs »
■íerve º 8 ¡ë more than 400 ¡.
üç.■üáüσeneral'íáεions products α
■proprietary εions products █ço ÇΣBM (íNA) Çì
■ÇçEC (çNA ÇìÇçECnÇôt).
#Çüâ103.4.1.Çσ.1
üå
üï¿╬Öing ê⌐?
üé.■üàüû/3ü╓ìàÇ█/400 Çî minicomputer ûs
■èfered ╙üáüσeneral.
üå.■üà 3000 minicomputer ìà MPE εEûî
■products èü▐ewlett Packard.
üä.■ÇΣBM'ÇíεEû, Ultrix êåased ÑÇ╪&T'Çí UNIX.
üç.■üàüôclipse MV êé Unisys product.
#Çüâ103.4.1.Ç▐.1
üç
üï¿╬Ö╒puting êÇòÇ⌐?
üé.■üéüε@ocal ü╧üÖ (Çδ) Çεows ¡ëíhare íoftware.
üå.■MS-Ç╥, PC-╥, Çü¬inder ì UNIX îΣmportant
■microcomputer εEûs.
üä.■üéítandalone microcomputer û may íupport ε
■éuxiliary ítorage εPs.
üç.■üéüε@ocal ü╧üÖ (Çδ), Çélthough ¢ery αful £
■íharing á, εòεow àíharing è peripheral
■εPs.
#Çüâ103.4.1.ÇΣ.1
üç
üï¿╬Öing êÇòÇ⌐?
üé.■Mainframe ûs ½çumb terminals îÜ where
■▐uge áúÑäustomers îÅvolved ì power ì
■ípeed îôssential.
üå.■üéítandalone microcomputer ê┬e £ε@oosely
■╘ganized σroups whose members work Ådependently Åé
■▐ome èfice.
üä.■üé¬irm èçesign ôngineers ε?ing 78 people would
■require Öed Γs £íophisticated ÇäAD programs.
üç.■üéímall èfice è 15 íales representatives ½ímall
■ábases would require εIítandalone Γ£▀
■íales rep.
#Çüâ103.4.1.j.1
üç
üï¿╬Öing ê⌐?
üé.■üéÇδÇε:s éäentral εTônvironment.
üå.■WANs ¬requently transmit á over phone ε@ines ìî
■àrefore ¬aster than Çδs.
üä.■PDNs îÜ╙àü¬ederal üσovernment ë maintain
■íecure εions.
üç.■Many σovernment ì military ûs α TCP/ÇΣP ÇÖs.
#Çüâ103.4.1.k.1
üç
üï¿╬Öing êÇòÇ⌐?
üé.■TCP/ÇΣP provides ÇüÉ Transfer Protocol (ǬTP).
üå.■TCP/ÇΣP provides remote Çπ.
üä.■TCP/ÇΣP provides ÇΓ mail (ÇíMTP).
üç.■TCP/ÇΣP Çεòεow remote ░cution è programs.
#Çüâ103.4.1.Çε@.1
üä
üï¿╬Öing êÇòÇ⌐?
üé.■Terminal ômulation requires ε2ômulator εware ì
■íoftware.
üå.■üà most ╒mon problem ½ômulation êà keyboard.
üä.■üäonnectivity means ε@inking ε@ike ûs ëgether ½
■äoaxial ε>.
üç.■üé microcomputer Σmitating ñother εPíuch █éçumb
■terminal êäalled ômulation.
#Çüâ103.4.1.m.1
üé
ü«êà main çifference ε minicomputer ûs ì
Çδs?
üé.■Minicomputer ûs îçesigned ëíupport çumb
■terminals, Çδs Çîò.
üå.■Minicomputer ûs èfer ▐igher productivity than Çδs.
üä.■Çδs Çî more ôxpensive ëåuild than minicomputer ûs.
üç.■Çδs Çîε@ess çependable than minicomputer ûs.
#Çüâ103.5.1.Çé.1
üç
üï¿╬ routers êÇòÇ⌐?
üé.■üñÅternal router êçedicated ╨éΓêÜ
■┌█é router.
üå.■üñôxternal router êçedicated ╨éΓêÜ
■┌█é router.
üä.■üçedicated routers î more ôfficient.
üç.■üñôxternal router êε@ocated ½in éÉö.
#Çüâ103.5.1.Çå.1
üç
üï¿╬Öing êÇòÇ⌐?
üé.■üε@ocal routers εow Çδs ÇÅàíame ╧ëÅternet.
üå.■Remote routers ù£m WANs ╙äonnecting Çδs over
■phone ε@ines ╘ PDNs.
üä.■ü█ynchronous routers may æÜë join remotely
■ε@ocated Çδs.
üç.■ü█ynchronous äonnections î usually more ôxpensive
■than íynchronous äonnections.
#Çüâ103.5.1.Çä.1
üç
üï¿äoncerning ü╓.25 åridges êÇòÇ⌐?
üé.■ü╓.25 routers require ¬ull-çuplex íynchronous εGs.
üå.■ü╓.25 remote multipoint routers may æÜëäonnect
■Çδs through PDNs.
üä.■Many PDNs αàü╓.25 transmission protocol.
üç.■üà point-ë-point ╝n èü╓.25 requires
■äonnection ëé PDN.
#Çüâ103.5.1.Çç.1
üä
üï¿äoncerning σateways êÇòÇ⌐?
üé.■üσateways provide à means £äonnecting çissimilar
■ûs.
üå.■üéσateway ùæôstablished ½éäoaxial ε>
■äonnection εé microcomputer ÑéÇδÇìéäluster
■äontroller Åé mainframe û.
üä.■üéσateway requires more äabling ì ports than é
■ítandalone microcomputer.
üç.■üà microcomputer ½àσateway εware ì
■íoftware écts █àöì manages íessions ε
■Çδ microcomputers Çìà mainframe ╘ minicomputer.
#Çüâ103.5.1.Çô.1
üå
üï¿äoncerning σateways êÇòÇ⌐?
üé.■üà█ynchronous σateway permits εion ½
■▐ost Γs, Çδs, remote Ç¡ìåulletin ε-.
üå.■üàü╓.25 σateway êܽé¬ull-çuplex
■█ynchronous εG.
üä.■üà 3270 σateway permits äonnection ½ñÇΣBM mainframe.
üç.■üà TCP/ÇΣP Çσateway êÜëε@ink é non-TCP/ÇΣP Çû
■½é TCP/ÇΣP Çû.
#Çüâ103.5.1.Ǭ.1
üé
üï¿╬íelecting áεions ê⌐?
üé.■üáôquipment purchases íhould æσuided primarily ╙
■é knowledge è«ôquipment êélready évailable ╪à
■íite.
üå.■üà "tennis íhoe" Ö (íharing óettes) êñ
■Åefficient ì nonproductive áεions û.
üä.■üà¬irst äonsideration ╨çeciding «á
■εions ôquipment ëåuy êàε=ìε5uality è
■áëæíhared.
üç.■üäarefully íelected áεions products ε;
■σenerally òæ obsolete £ two years.