An ninh mng vin thng

An ninh mng vin thngBo mt mng LAN

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LOGO1Nhm 4

Mnh CngTrn Vn HinhNguyn Vn HuynNguyn Vn Long

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Ngy nay, tt c cc nc trn th gii u ang dnh s u t rt to ln pht trin cng ngh thng tin. Bn cnh nhng lnh vc lp trnh pht trin phn mm v th an ton v bo mt cng ang rt c quan tm nghin cu

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Trong mi trng mng, mt lng thng tin hay mt khi d liu i t ngi gi n ngi nhn thng phi qua nhiu nt khc nhau, khng c ai c th m bo rng thng tin khng b sao chp, nh cp hay xuyn tc. Do thng qua bi thuyt trnh chng em mun nu ln mt s phng php gip cho ngi qun tr mng c th trin khai bo v mng LAN trc nhng tn cng v truy nhp tri php.

LOGOTNG QUANMt s bin php bo vTng ktCc phng thc tn cngTng quan v mng LAN

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mc c bn nht, mng (network) bao gm hai my tnh ni vi nhau bng cp (cable) sao cho chng c th dng chung d liu. y chnh l mt thnh tu ln lao trong cng ngh truyn thng.

Mng l g ?

I. Tng quan v mng LAN

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Mt nhm my tnh v cc thit b ngoi vi kt ni vi nhau bi cc ng truyn vt l theo mt kin trc no c gi l mng (network), cn khi nim cc my tnh ni vi nhau dng chung ti nguyn gi l ni mng (networking).

I. Tng quan v mng LAN

LOGOTh no l mng LAN ?

LAN l vit tt ca Local Area Network (Mng cc b).Cc my tnh c nhn v cc my tnh khc trong phm vi mt khu vc hn ch c ni vi nhau bng cc dy cp cht lng tt sao cho nhng ngi s dng c th trao i thng tin, dng chung cc thit b ngoi vi, v s dng cc chng trnh cng nh cc d liu c lu tr trong mt my tnh dnh ring gi l my dch v tp (file).

I. Tng quan v mng LAN

LOGOCc kiu u mng LANC 3 kiu chnh:Kiu BUS (kiu xa l)

Kiu Ring (kiu vng)

Kiu Star (kiu hnh sao)

I. Tng quan v mng LAN

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Mng LAN u kiu BUSTt c cc trm phn chia chung mt ng truyn chnh. ng truyn ny c gii hn 2 u bi mt loi u ni c bit gi l terminator. Mi trm c ni vo bus qua mt u ni ch T. Khi 1 trm truyn d liu, tn hiu c qung b trn 2 chiu ca bus, ngha l tt c cc trm cn li u c th nhn c.

I. Tng quan v mng LAN

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Mng LAN u kiu RingTn hiu c lu chuyn trn vng theo mt chiu duy nht. Mi trm c ni vi vng qua mt b chuyn tip (repeater) c nhim v nhn tn hiu v chuyn n trm k tip trn vng. Cn thit phi c giao thc iu khin vic cp pht quyn c truyn d liu trn vng cho cc trm c nhu cu.

I. Tng quan v mng LAN

LOGOI. Tng quan v mng LAN

Mng LAN u kiu StarTt c cc trm c ni vo 1 thit b trung tm c nhim v nhn tn hiu t cc trm v chuyn n trm ch ca tn hiu. Tu theo yu cu ca truyn thng mng thit b trung tm c th l mt b chuyn mch (switch), b chn ng (router) hoc n gin l mt b phn knh (hub). Star l topo lp t n gin, d cu hnh, d kim sot v khc phc s c. Tuy nhin di ng truyn vi thit b trung tm b hn ch (khong 100m).

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Mt s bin php bo vTng ktCc phng thc tn cngTng quan v mng LAN

LOGOTn cng ch ngTn cng b ngTn cng passwordLANII. Cc phng thc tn cng

LOGOII. Cc phng thc tn cng

Tn cng ch ng

LOGOI. Tng quan v mng LAN

LOGOThank You !

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