Mang & Thiet Bi

8/14/2019 Mang & Thiet Bi

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Mng v thit b truyndn


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Mc tiu bi hc

Tm hiu s pht trin ca mng M t cc loi mng - phn loi

Tm hiu cc dch v mng Tm hiu cc thit b truyn dn cho mng

Tm hiu cc kiu kt ni mng Tm hiu cc thit b kt ni mng


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S pht trin ca mngCc my tnh n l vi d liu cc b

Kt ni mng, cc ti nguyn v d liu c chia s trong ton mng


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Mng my tnh l g?

Mng l mt s kt ni 2 hay nhiu my tnhvi nhau bng mt phng tin truyn no: nh cc loi dy cp, sng v tuyn

D liu truyn trong mng phi tun theomt tp cc qui tc truyn thng no cho My tnh gi v My tnh nhn hiu cnhau. Cc qui tc ny gi l cc Giao thc (Protocol)


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Lch s pht trin ca mng my tnh

Cc khi nim v mng my tnh c a vo nghin cu

t nhng nm 60

H thng u cui 3270 ca IBM c gii thiu vo nm 1971v c s dng m rng kh nng tnh ton ca trung tm

my tnh t

i cc vng xa.

Nm 1977, Cng ty Dataapoint Corporation a ra hiuhnh mng Arcnet (Attached Resource Computer Network).

Ngy nay mng my tnh tr nn qu quen thuc i vi chngta, trong mi lnh vc nh khoa hc, qun s, quc phng,thng mi, dch v, gio dc. . . Hin nay nhiu ni mng tr thnh mt nhu cu khng th thiu c


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ng dng ca mng my tnh S dng chung ti nguyn

Phn mm: cc tp d liu, cc phn mm ng dng (MS Office,) Phn cng: Cc my in, modem, my fax...

Tng tin cy ca h thng

Nng cao cht lng v hiu qu khai thc thng tin p ng nhng nhu cu ca h thng ng dng kinh doanh hin i. Cung cp s thng nht gia cc d liu.

Tng cng nng lc x l nh kt hp cc b phn phn tn. Tng cng truy nhp ti cc dch v mng khc nhau ang c cung

cp trn th gii.


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Cc loi mng Mng cc b (LAN Local Area Network)

Ph

m vi k

t n

i vt l h

p (1Mbps)

Chi ph thp (cu hnh My ch khng cao, dng cpng trc hoc xon i)

D dng thi cng v qun l


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Mng th (MAN Metropolitan Area Network) C phm vi kt ni rng (trong mt thnh ph) Tc thng cao

Mng din rng (WAN Wide Area Network)Mng cng cng Phm vi kt ni rng (trong mt quc gia)

S dng cc dch vng truyn khc nhau (inthoi, v tinh ) Tc c nhiu loi (ph thuc vo tng kt ni)

Cc loi mng (tt)


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MNG DIN RNG


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Xy dng mng cc b

Phn c

ng:

My tnh Cc mng Cp truyn dn Hub/Switch


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Hiu hnh mng

Phn ct li ca mng Tng tc vi my trm v ti nguyn V d: Windows 2003 Server, Unix, Linux, Novell

Netware Phn mm my trm

Ci trn my trm, lm vic tng tc vi my cha cc yu cu khai thc ti nguyn mng

Cc ng dng Tng tc vi ngi s dng bng cc giao din C th ci trn my trm hoc chia s bi cc phin

bn ci trn my ch

Xy dng mng cc b (tt)


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Cc dch v mng

Tp tin (File Service) In n (Print Service)

Th tn (Mail Service) ng dng (Application Service)

C

s

d

liu (Database Service)


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Dch v in n (Print Service)

Gim thi

u s

l

ng my in cn

u t

C c v tr hp l trong vic t my in Qun l hiu qu cc tc v in n t my

tnh Chia s sc mnh ca cc my in chuyn

nghip Tin hc ha qui trnh gi / nhn cc bn

fax


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Dch v ng dng (ApplicationService)

Chuyn mn ha cc my ch Tnh n nh cao cho cc ng dng

Hiu qu trong vic s dng cc Licenseca phn mm ng dng

Gim chi ph u t ban u cho cc ngdng chuyn nghip


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Dch v c s d liu mng(Database Service)

Ti u ha vic lu tr v x l thng tin

Ti to thng tin

Cung cp kh nng bo ton d liu

iu phi d liu phn tn


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Thit b truyn dn

Mi tr

ng truyn d

nHai loi chnh: hu tuyn (tn hiu in t) v

v tuyn (tn hiu sng in t)

c tnh, gi thnh da vo tnh nng vt l Cc loi vt liu truyn dnXon ing trcCp quang

Khng dy


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Cc loi vt liu truyn dn Cp xon i

C lp bo v (STP - Shielded Twisted Pair) Chng nhiu t Gi thnh cao t c s dng trong mi trng mng ph thng

Khng c lp bo v (UTP - Unshielded Twisted Pair) S dng ph bin Gi thnh ph hp

Kh nng chng nhiu l chp nhn c Khong cch kt ni tt


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Cc loi vt liu truyn dn (tt)

Cp xon i


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Cp ng trcc s dng rng ri trong cc mng cng cng

Truyn c khong cch xa

Ph hp c 2 loi tn hiu: tng t v s ThinNet (cp mnh)

Thi cng d

Khong cch s dng tt l 185m ThinkNet (cp bo)

Cng v kh thi cng

Chiu di khong cch m bo tn hiu l 500m



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Cp ng trc


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Cp quang


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Thit b khng dy Sng radio

Sng ngn radio Thng c chia thnh 2 gii tn: Gii tn cao (VHF Very

High Frequency) v gii tn rt cao (UHF Ultra High

Frequency) Vi sng

Truyn trn mt t hoc qua v tinh Kh nng cung cp bng thng rng Gi thnh mm do, chi ph thp

Tn hiu hng ngoi Thit b r

Tc

cao Chng kh nng d gtn hiu

Cc loi vt liu truyn dn


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Kt ni mng Phn cng mng v cc thit b kt ni

Modem Repeater Hub BridgeMultiplexer

Cc thit b kt ni lin mng Router Brouter CSU/DSUGateway


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Cc m

ngChuyn i tn hiu in my tnh -> tn hiu

in thng thng

Mt hoc hai cng truyn dn cho cc u nicp ng trc hoc cp xon i

ModemChuyn i tn hiu in my tnh -> tn hiu

in thng thng

Hai loi: Lp trong hoc lp ngoi

Phn cng cho kt ni


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Repeater (b lp)Ti to v khuych i thng tin truyn

Hub (c 3 loi)ThngTch ccThng minh

Bridge (cu ni)Ghp kt ni t phn on (segment) ny

sang phn on khc

Phn cng cho kt ni


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B

trn (MultiPlexer)H ch cho php nhiu knh tn hiu s dng

cng mt ng truyn vt l

Phn cng cho kt ni


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CSU/DSU (Channel Service Unit / DigitalService Unit)Chuyn i tn hiu xung in truyn trong

mi trng WANBo v thit b khi cc xung in hoc in

p khng n nh

Chun ha cc nh dng d liu trc khitruyn cho ph hp cc nguyn tc mng c

th

Phn cng kt ni lin mng


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Cng kt niS dng kt ni cc mng khc nhau v:

Giao thc truyn thng

Cu trc nh dng d liu Ngn ng

Cc kin trc mng

C th ty bin c trong cc trng hps dng khc nhau

Phn cng kt ni lin mng

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