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- 1. CHNG IV. MNG MY TNH V INTERNET. 20 MNG MY TNH A. MC TIU: Kin thc: Bit c khi nim mng my tnh v cc dng mng my tnh Bit c cc loi phng tin truyn thng v giao thc truyn thng trong mng. Phn bit c hai loi mng my tnh l mng cc b v mng din rng Bit c hai loi m hnh truyn thng trong mng l m hnh khch ch v m hnh ngang hng. K nng Nhn bit cc dng mngmy tnh, phn bit c 2 loi mng cc b v din rng, cc loi thit b truyn thng v phn bit c 2 loi m hnh mng. Thi Hc sinh nhn thc c qu trnh pht trin ca mng my tnh, thy c s cn thit v li ch khi lm vic trong mi trng mng. B.PHNG PHP V PHNG TIN DY HC Thuyt trnh kt hp gi m vn dn dt hc sinh pht trin bi hc. C th phn nhm hc tp hot ng 2 v 4. Bng, phn, sch gio khoa Tin hc lp 10. My chiu, tranh nh v cc on phim c s dng CNTT, Ti liu minh ha (nu c), SGK C. TIN TRNH DY HC: I. n nh lp : II. Kim tra bi c Ni dung 1. Khi nim mng my tnh :Hot ng ca gio vin v hc sinh Ti sao phi ni mng my tnh ?Mng my tnh l h thng trao i c lp suy ngh v tr li: thng tin gia cc my tnh bao - sao chp v truyn d liu gm cc thnh phn c bn: - Chia s ti nguyn (thng tin, thit b...)
2. - Cc my tnh- To thnh mt h thng tnh ton ln.- Cc thit b mng m bo kt - Quan st lnh hi kin thc ni cc my tnh vi nhau. - Phn mm cho php thc hin vic giao tip gia cc my tnh. 2. Phng tin v giao thc Minh ha cu tr li ca hc sinh bng hnh truyn thng : nh a. Phng tin truyn thng: Din gii : Thng qua mng my tnh c th * Kt ni c dytrao i thng tin v dng chung d liu.* Kt ni khng dy2.Yu cu HS nghin cu SGK v cho bit khi nim mng my tnh ? Nhng thnh phn c bn no cu thnh mng my tnh?b. Giao thc: 3. Phn loi mng my tnh: a. Theo phn b a l:Nghin cu SGK v c lp tr li :- Mng my tnh l cc my tnh c kt - Mng cc b (LAN): Kt ni cc ni vi nhau to thnh h thng trao i my tnh gn nhau. thng tin gia cc my tnh. - Cc my tnh b. Theo kiu b tr cc my tnh- Cc thit b kt ni cc my tnh vi nhau.- Kiu ng thng.- H iu hnh mng- Kiu vng- Kiu hnh sao3. Va chiu cc hnh nh va ging gii v cc thit b kt ni v cc hnh thc kt ni theo kiu c dy v khng dy 3. minh ho vic truyn thng thng qua b giao thc TCP/IP Minh ho cho Mng cc b v mng din rng Yu cu HS cho v d v mng cc b. Quan st lng nghe, ghi nh. V d mng cc b : - Mng ni bi trong mt to nh, mt c. Theo chc nng ca my tnh trng hc, mt c quan... trong mng: 4. Nghin cu SGK v cho bit mng my - M hnhngang hng. tnh c b tr theo nhng kiu no : minh ha cho 3 kiu b tr : ng thng, hnh sao, dng vng. Nghin cu SGK, suy ngh v c lp tr li. - Kiu ng thng. - M hnh khch - ch- Kiu vng - Kiu hnh sao - M hnh ngang hng: mi my trong mng va cung cp ti nguyn va s dng ti nguyn trong mng.ClientClientServer- M hnh khch ch: Hy cho bit u v nhc im ca mi kiu mng trn? + My c chc nng qun l v cung cp ti nguyn cho cc my khc trong mng c gi l mu ch. + Cc my s dng ti nguyn ca my ch gi l my khch. B sung kin ca HS v Nhn mnh : mi kiu b tr mng nh trn cn c cc loi thit b mng khc nhau, chi ph xy dng, s pht trin mng, cch thc 4. qun l mng cng khc nhau. gii thiu hai m hnh mng : khch ch v ngang hng. Yu cu hc sinh nhn xt v 2 m hnh trn v a ra khi nim tng loi m hnh. M hnh ngang hng M hnh khch ch Tng hp kin ca hc sinh v nhn mnh ngha ca mi loi m hnh. IV. CNG C BI HC: Nhng ni dung hc : Khi nim mng my tnh Phng tin v giao thc truyn thng trong mng my tnh Phn loi mng my tnh Cu hi v bi tp v nh : Lm bi tp SGK Xem trc bi hc : Mng thng tin ton cu Internet. 5. .21 MNG THNG TIN TON CU INTERNET A. MC TIU: Kin thc Bit c khi nim mng Internet v nhng li ch ca n. Bit c cch thc kt ni Internet K nng Phn bit c hai cch kt ni Internet: kt ni qua ng dy in thoi v s dng ng truyn ring. Thi Hc sinh thy c s pht trin ca mng Internet, nhn thc c li ch ca Internet, t c ham mun tm kim thng tin trn Internet phc v hc tp. B. PHNG PHP V PHNG TIN DY HC Thuyt trnh kt hp gi m vn dn dt hc sinh pht trin bi hc. C th phn nhm hc tp hot ng 2 v 4. Bng, phn, sch gio khoa Tin hc lp 10. My chiu, tranh nh v cc on phim c s dng CNTT, Ti liu minh ha (nu c), SGK C. TIN TRNH DY HC: I. n nh lp: II. Kim tra bi c. Hy nu s ging v khc nhau ca mng LAN v WAN? iu kin cc my tnh trong mng giao tip c vi nhau l g? Em bit g v giao thc? Ni dungHot ng ca gio vin v hc sinh1. Chiu hnh nh HS quan st v tr li cu Internet l mng my tnh ton hi: Chng ta nghe rt nhiu v Internet vy cu khng l, kt ni hng triu theo em mng Internet l g? my tnh,mng my tnh trn khp Quan st , c lp suy ngh v tr li : - L mng th gii v s dng b giao thc my tnh kt ni hng vn my tnh trn khp th truyn thng TCP/IP. gii.1.Internet l g? 6. *Li ch ca Internet. -Cung cp ngun thng tin khng l.Cung cp cc ch dn b ch, dch v mua bn, truyn tp, th tn in t v nhiu kh nng khc. Internet2.Kt ni Internet bng cch 2. Phn 4 nhm hc tp cng thc hin mt yu cu no? trn phiu hc tp :Nu nhng li ch khi s dng a)S dng Mdem qua ng mng internet? dy in thoi. - Yu cu mi nhm c mt ngi c phiu hc -Yu cu: My c ci Mem tp, cc nhm khc nghe v b sung. kt ni vi ng in thoi. K 2. Nghin cu SGK, tho lun theo nhm v in hp ng vi ISP. phiu hc tp -u im:D kt ni, chi ph thp. - Internet m bo cho mi ngi kh nng thm -Nhc im :Tc ng nhp n nhiu ngun thng tin thng trc, cung cp cc ch dn b ch, dch v mua bn, truyn truyn thp. tp, th tn in t v nhiu kh nng khc na b.S dng ng truyn ring. - Nhn xt, b sung nh gi phiu hc tp ca cc -Yu cu: nhm. u im: Tc ng truyn - Nhn mnh nhng li ch ca mng Internet. cao. - C hng triu ngi s dng Internet nhng Nhc im: Gi thnh cao. khng c ai l ch s hu n c. T chc Hi c-Mt s phng thc kt ni ng v kin trc Internet, gm nhng ngi tnh khc. nguyn iu khin mng ny. +S dng ng truyn ADSL Hi : hy cho bit ai l ch s hu mng Internet ? (Asymmentric Digital 3. Nu vn : Hin nay hu ht cc c quan nh SubscriberLine). nc, cc trng hc thm ch cc h gia nh u u im: Tc ng truyn s dng Internet. tng i cao, gi thu bao ngy Pht vn: Em hy k cc phng php kt ni cng h. Internet m em bit ? +S dng cng ngh khng dy Din ging: y l cch c s dng nhiu trc (Wi-fi, Wimax). y cc gia nh v c quan nh. u im: cung cp kh nng kt -Cho bit yu cu ca cch kt ni ny. 7. ni Internet mi thi im, mi ni thng qua in thoi di ng, my tnh xch tay... 3.Cc My Tnh Trong Internet Giao Tip Vi Nhau Bng Cch No? -Cc my tnh trao i vi nhau thng qua b giao thc TCP/IP. Nu yu cu kt ni theo cch s dng ng Thng tin c phn chia thnh truyn ring. cc gi nh v chng truyn c - Kt ni qua ng dy in thoi v kt ni s lp vi nhau. dng ng truyn ring ADSL Lm th no gi tin n - Quan st v lng nghe. ng ngi nhn. - nghin cu SGK v tr li: Mi my tnh khi tham gia vo mng u phi c a ch duy nht -Yu cu: gi l a ch IP. +My tnh c ci Modem v kt ni vi ng in thoi +K hp ng vi nh cung cp dch v Internet (ISP) Yu cu: Thu mt ng truyn ring kt ni t my mnh n ISP. C mt my y quyn trong mng Lan kt ni vi ISP.Din ging : ng thu bao bt i xng, cch ny cng s dng ng in thoi nhng c ch hot ng bt i xng khng nh hng n cc cuc gi in thoi. i vi cch ny dng Mem c bit l Mdem ADSL. Pht vn : Em hy cho bit mt s ng dng ca cng ngh khng dy hin nay? 8. 4. Pht vn : Cc my tnh giao tip vi nhau nh th no ? Quan st nghin c sgk v tr li: - B quy tc ny l tp hp cc quy nh v khun dng d liu v phng thc truyn d liu gia cc thit b trn mng. - Vy b giao thc TCP/IP l g? - Ni dung mt gi tin gm nhng g ? Ni dung 1 gi tin: - a ch nhn, a ch gi - D liu, di - Thng tin kim sot li v cc thng tin phc v khc. Vd: tuoitre.com.vn Din ging : Nh ta bit mi bc th khi chuyn i phi c a ch ngi nhn. Do khi 1 gi tin g i phi c a ch my nhn. Vd mi in thoi gi i my khc cng nh nhn cuc gi t my khc th phi c s duy nht khng trng vi cc my khc. -Trong Internet c mt s my ch DNS chuyn i a ch IP dng s sang dng k t. IV. CNG C BI HC: Nhng ni dung hc : Khi nim mng Internet. Cch thc kt ni Internet. 9. Cch thc giao tip trn Internet. Cu hi v bi tp v nh : Lm bi tp SGK Xem trc bi hc : Mt s dch v c bn ca Internet. 10. 22 MT S DCH V C BN CA INTERNET A. MC TIU: Kin thc Bit khi nim trang Web, Website Bit chc nng trnh duyt Web Bit cc dch v: tm kim thng tin, th in t K nng S dng c trnh duyt Web Thc hin c tm kim thng tin trn Interrnet. Thc hin c vic gi v nhn th in t. Thi Thy c vic trao i thng tin trn Internet l rt quan trng trong thi i ngy nay. II. PHNG PHP V PHNG TIN DY HC Thuyt trnh kt hp gi m vn dn dt hc sinh pht trin bi hc. C th phn nhm hc tp hot ng 2 v 4. Bng, phn, sch gio khoa Tin hc lp 10. My chiu, tranh nh v cc on phim c s dng CNTT, Ti liu minh ha (nu c), SGK C. TIN TRNH DY HC: I. n nh lp II. Kim tra bi c. Internet l g? Hy gii thiu v giao thc TCP/IP. Ni dungHot ng ca gio vin v hc sinh Yu cu HS hy k tn mt s dch v trn Internet m em s dng ? Quan st, c lp suy ngh v tr li : 1.Tchc v truy cp thng tin?- Nghe nhc - Chi Game online 11. a. T chc thng tin:- Chat- Thng tin trn Internet c t - Tm kim thng tin chc di dng siu vn bn : tch - Gi Emai hp vn bn, hnh nh, m thanh, video.. v cc lin kt n cc siu Cho HS xem mt trang WEB v tr li cu hi : Em c nhn xt g v cch thc t chc thng vn bn khc. tin trn Internet ? - Trang web l siu vn bn c - C ch, hnh nh, m thanh, video, c th gn mt a ch truy cp. lin kt n cc trang web khc. - Website l tp hp ca nhiu trang web trong h thng WWW, Din gii: Thng tin trn Internet c t chc trong trang u tin gi l trang di dng siu vn bn : tch hp vn bn, hnh nh, m thanh, video.. v cc lin kt n cc ch (Homepage). siu vn bn khc. b. Truy cp trang web: www.google.com.vn - truy cp n cc website phi s dng mtc hng trnh t bit www.edu.net.vn l trnh duyt web. www.tuoitre.com.vn - Hai trnh duyt web thng dng Gii thch HS hiu c khi nim trang nht l Internet Explorer v web. Netscape Navigator. Hi: Hy cho v d v mt s a ch m em 2. Dch v c bn ca Internet : bit ? a. dch v tm kim thng tin - Website ca s gio dc v o to Tha Cch 1: Tm kim theo danh mc Thin Hu: www.thuathienhue.edu.vn a ch hay lin kt c t trn - Gii thch HS hiu khi nim Website. cc trang web. - Internet Explorer Cch 2: Tm kim nh cc my tm Hi: Hy cho v d v mt s website m em kim. bit ? b. Dch v th in t : Suy ngh v tr li : - gi v nhn th ngi dng - tng s dng website Google tm kim cn ng k hp th in t do nh cung cp dch v th cp pht. - Mi hp th c gn vi mt a - Lng nghe, quan st lnh hi kin thc. ch c dng : Hi : Hy nu cc trnh duyt web m em bit @. - Gii thch khi nim v cc vng lm vic trn 12. 3. Vn bo mt thng tin :trnh duyt web Internet Explorer.2. Nu vn : c khi no em tm kim thng tin trn Internet cha v tm kim nh - Vn bo mt thng tin rt quan th no? trng trong thi i Internet, v vy - Nhn xt, b sung cu tr li ca HS v gii nn thc hin : thch cc dch v tm kim trn Internet v gii + Gii hn quyn truy cp. thiu mt s web site cung cp cc my tm kim ni ting + M ho d liu. + m bo ngn nga nguy c 3. Nu vn : Em no tng gi th in t nhim virus khi s dng cc dch (Email)? Em c nhn xt g v dch v th in t? cho mt vi v d v a ch hp th ? v trn Internet. tng gi th in t. nhn xt : Tit kim thi gian, tin bc, tin li... - [email protected] - [email protected] ... - Dch v qua ng bu in : mt nhiu thi gian, khng thun tin, tn nhiu tin hn... Em hy so snh dch v gi th qua ng bu in v dch v th in t. Nu cch s dng hp th in t ca YAHOO v nhn mnh li ch ca vic s dng th in t. 4. Nu vn : Ti sao phi bo mt thng tin trn Internet ? Nghin cu SGK, c lp suy ngh v tr li : - bo v thng tin trnh nhng i tng truy cp vi mc ch ph hoi. Nghin cu SGK v tr li : C 3 cch : - Truy cp c gii hn - M ho d liu 13. - Phng chng Virus xm nhp. - Ngi dng cn phi ng nhp bng tn v mt khu. Quan st, lng nghe b sung kin thc. Nhn mnh : C nhiu cch bo v trang web ? hy nu cc cch m em bit ? Em hiu nh th no v truy cp c gii hn ? -Minh ha. -Gii thch vn m ho d liu vi nhiu mc ch khc nhau trong c mc ch bo mt thng tin. Hi : bao gi em nghe ni n virus my tnh cha ? n pht sinh t u v c hi nh th no? Lng nghe, suy ngh v tr li : - tng nghe - Thng tin trn my tnh c th b mt hoc b nhim virus khi duyt qua cc trang web hoc khi ti ti liu, m thanh, hay mt chng trnh tin ch...trn Internet. - S dng phn mm dit virus. - Bkav - Norton Antivirus - Symatec Antivirus - Quan st, lng nghe b sung kin thc. Lm sao tiu dit virus my tnh? Hy nu mt s phn mm dit virus m em bit ? Tiu kt : Mi phn mm dit virus ch c th pht hin, ngn nga hoc tiu dit c mt s 14. loi virus nht nh do vy cn cp nht thng xuyn cc phn mm chng virus m bo ngn nga nhng loi virus mi xut hin. IV. CNG C BI HC: Nhng ni dung hc : T chc v truy cp thng tin trn Internet. Tm kim thng tin trn Internet. Dch v th in t. Bo mt thng tin trn Internet. Cu hi v bi tp v nh : Chun b bi thc hnh. Lm bi tp SGK. 15. BI TP THC HNH 10 S DNG TRNH DUYT INTERNET EXPLORER.A. Mc tiu: Lm quen vi vic s dng trnh duyt Internet ; Lm quen vi mt s trang web c, lu thng tin Bit cch duyt cc trang web, B. Phng php v phng tin dy hc Tham kho trc bi hc nh ; Chun b gio n phng my thc hnh; Ly hc sinh lm trung tm. C.Tin trnh dy hc: I. n nh lp. Kim tra s s hc sinh. II. Kim tra bi c. III. Bi mi. Kin thc k nng c bnHot ng ca GV - HS:Hng dn thc hnhGV:a)Khi ng trnh duyt IEHng dn hs thc hnh theo yu cu.HS lm quen vi vic tm kim thng tin nh s dng trnh duyt Internet Explorer Khi ng trnh duyt: Thc hin mt trong cc thao tc : - Nhy p chut vo biu tng IE trn mn hnh nn ; - Nhn phm Internet trn bn phm (nu c). Trn mn hnh xut hin ca s lm vic ca IE . b) Truy cp trang web bng a ch Khi bit a ch ca mt trang web , v d http:www.vnn.vn l trang ch ca vietnamNet , truy cp trang web thc hin cc bc sau :V.Cng c: Cc kin thc v trnh duyt Web thng qua thc hnh thc tin. 16. 1 . G vo a ch : http:www.vnn.vn ; 2. Nhn phm Enter. Tm hiu ni dung ca Trang web gio dc. Duyt trang webGV:Truy cp trang web thc hin cc bc s au :Hng dn hs thc hnh theo yu cu.1 . G vo a ch : http:www.vnn.vn ; 2. Nhn phm Enter. Nhy chut vo nt lnh (Back) quay v trang trc duyt qua;1. M mt s trang web. 2. Duyt web. 3. Lu thng tin trn trang web. 4. Lu hnh nh trn trang web ang mNhy chut vo nt lnh (Forward) n trang tip theo trong cc trang duyt qua ; Nhy chut vo cc lin kt chuyn t mt trang web ny n mt trang web khc V d , nhy chut vo lin kt Gio dc ca trang www.vnn.vn th trang web v gio dc ca www.vnn.vn s c hin th .Ngi dng c th dng li c cc thng tin hoc nhy chut vo cc lin kt khc trong trang ny m ra cc trang web tng ng . Lu thng tin Ni dung trn trang web nh:on vn bn hoc nh hoc c nh v vn bn u c th c in ra hoc in vo a . Lu hnh nh trn trang web ang m thc hin cc thao tc: 1 Nhy nt phi chut vo hnh nh cn lu , mt bng chn c m ra ;V.Cng c: Cc kin thc v trnh duyt Web thng qua thc hnh thc tin. 17. 2 Nhy chut vo mc Save Picture As ..., khi window s hin th hp thoi la chn v tr lu nh. 3 La chn th mc cha nh v t tn cho tp nh (nu khng chp nhn tn mc nh ). 4 Nhy chut vo nt Save hon tt . lu tt c thng tin trn trang web hin thi , ta thc hin cc thao tc : 1 Chn lnh FileSave as ...2 t tn tp v chn v tr lu tp trong hp thoi c m ra ; 3 Nhy chut vo nt Save hon tt vic lu tr . in thng tin trn trang web hin thi , ta chn lnh File Print.... .Khi Windows s hin th hp thoi cho php ta tin hnh in . IV. Cng c. n tp k cc kin thc l thuyt hc. n tp k cc kin thc l thuyt hc v trnh duyt web. n tp k cc kin thc hc v th in t. 18. BI TP VTHC HNH 11 TH IN T V MY TM KIM A.Mc tiu: ng k hp th in t mi ; c , son v gi th in t ; Tm kim thng tin n gin nh my tm kim thng tin . B. Phng php v phng tin dy hc Tham kho trc bi hc nh; Chun b gio n v phng my chu o Ly hc sinh lm trung tm. C.Tin trnh dy hc: I. n nh lp. Kim tra s s hc sinh II. Kim tra bi c. III. Bi mi. Kin thc k nng c bn Ni dung:Hot ng ca gio vin v hc sinh GV:Hng dn thc hnh: 1.Th in tHng dn hs thc hnh theo yu cu.a1) ng k hp th :1.Th in tThc hin vic ng k hp th trn cc webside ca yahoo Vit Nam thng qua a ch http://mail.yahoo.com.vn.1.ng k hp th 3. S dng hp th.M trang web http://mail.yahoo.com.vn4. Son th v gi th.2. ng nhp hp th.1. Nhy chut vo nt ng k ngay m trang web ng k hp th mi 2. Khai bo cc thng tin cn thit vo mu ng k ngay tn truy cp , mt khu ,... 3. Theo cc ch dn hon thnh vic dng k hp th . Ch : Khi hon thnh ng k hp th , cn phiV.Cng c: 19. nh tn truy cp v mt khu c th ng nhp vo hp th . Hp th s c to trn my ch v nh cung cp dch v . a2) ng nhp hp th s dng c hp th cn phi ng nhp hp th , thc hin cc thao tc sau: 1 .M li trang ch ca webside th in t (http://mail.yahoo.com.vn); 2 .G tn truy cp v mt khu ; 3 .Nhy chut vo nt ng nhp m hp th . a3) S dng hp th Theo ch dn trn trang ny c th thc hin cc thao tc sau: c th : 1. Nhy chut vo nt Hp Th xem danh sch th ; 2.Nhy chut vo phn ch ca th mun c . Son th v gi th : 1 .Nhy chut vo nt son th son th mi. 2 .G a ch ngi nhn vo Ngi nhn . 3 .Son ni dung th ; 4 .Nhy chut vo nt Gi gi th . ng hp th : Nhy chut vo nt ng Xut kt thc khi khng lm vic vi hp th na. Ch : C th ti cc thng tin trong hp th v my c nhn lu tng t nh lu thng tin trn trang web . Mt s thnh phn c bn ca th in t : a ch ngi nhn (To);Cc kin thc v Th in t 20. a ch ngi gi (From); Ch (Subject); Ngy thng gi (Date); Ni dung th (Main Body); Tp gn km (Attachments); Gi mt bn sao n a ch khc (CC). 1. My tm kim Google .GV:Tm kim thng tin nh my tm kim google mt trong nhng my tm kim hng u hin nay.Hng dn hs thc hnh theo yu cu.Thc hin cc thao tc sau tm kim thng tin :1.My tm kim Google .a .Khi ng : M trang web Ch : My tm kim http://.google.com.vn , my tm kim google xut hin. khng a ra tt c cc Ch : Google h tr giao din theo nhiu ngn ng webside trn Internet c lin quan , ch a ra nhng v c kh nng nhn bit khu vc . trang web m n thu thp Chnh v vy , nu ngi dng truy cp vo google c . V th , thng thng theo a ch http://.google.com. Thng qua nh cung s dng my tm kim ca cp dch v Internet Vit Nam , a ch t ng i cc nh cung cp dch v c thnh http://.google.com.vn v ngi dng s lm vic uy tn , ta s nhn c vi giao din ting vit . thng tin y v cp nht hn Google sp xp cc kt b .S dng kho tm kim: G kho tm kim lin quan n vn mnh quan tm vo tm kim qu tm kim theo mt tiu ch ring v lit k cc kt (v d : 'im thi i hc '); qa tm kim theo tng c .Nhn phm Enter hoc nhy chut vo nt trang , mi trang khong Tm kim vi Google . mi kt qu vi cc thng Mun chuyn sang trang kt qu khc , hy nhy tin m t ngn gn v trang chut vo ch s trang tng ng pha cui ca web tm c . trang kt qu . Cch to kho tm kimV d , ch m ta cn tm Gi s ta dng kho tm kim l thi i hc . Khi , l mu tm hoa sim ca nh my tm kim Google s a ra cc trang web cha th Hu Loan .My tm cm t thi i hc v cc trang web cha cc t kim Google s a ra cc trong kho tm kim nhng th t xut hin ca trang web khc nhau tu 21. chng khng nht thit phi theo ng th t trong kho , v d trong kt qu tm kim c trang cha ''....trng i hc Khoa hc T nhin t chc cc cuc thi Olympic ...'' . Nh vy , vi t kho tm kim trn , my tm kim Google s a ra khng nhng ch cc trang web ph hp m cn c cc trang c th khng ph hp vi ch ta cn tm . my tm kim Google ch a ra cc trang web cha mt cm t chnh xc v v tr lin k v th t xut hin ca cc t , cn vit kho tm kim trong nhy kp , v d "thi i hc ". Chn mc Tm kim vi nhiu chi tit trong trang ch ca google s dng trang tm kim nng cao . Tm kim hnh nh Chn mc hnh nh v chn t kho vo tm kim tm nhng hnh nh c lin quan n t kho . Mt s lu khi s dng cc dch v Internet: * Lun chy phn mm dit virus v cp nht thng xuyn ; * Khng m cc tp km th in t khi khng chc chn an ton ; * Ch nhn cc tp t cc website tin cy; * Khi cn dng mt khu nn s dng mt khu di hn tm k t gm c ch v s ; * Khng cung cp cc thng tin c nhn ( h tn, a ch , tn trng , thng tin gia nh ), nh khi hi thoi trc tuyn ; Khi s dng cc thng tin trn Internet , cn lu n vn bn quyn . V.Cng c: Cc kin thc v My tm kim VI .HNG DN HC NH: n tp k cc kin thc v my tm kim. n tp k cc kin thc chun b kim tra.thuc vo kho tm kim c to. Hy thc hin cc tm kim sau v nhn xt kt qu thu c : Tm kim vi kho l Mu tm hoa sim; Tm kim vi kho l "Mu tm hoa sim"; S dng cng c nng cao