01 ntawm 06
Lub Koos Haum Nem Nias Kom yooj yim rau cov ntaub ntawv sib qhia
Phau ntawv qhia no rau cov tes hauj lwm lov tawm hauv lub ncauj lus rau hauv cov duab ua pov thawj. Txhua phab nta ib qho tseem ceeb tswvyim los yog lub ntsiab lus ntawm wireless thiab computer networking.
Daim duab no qhia txog yam yooj yim ntawm lub computer network. Hauv ib qho yooj yim network, ob lub khoos phis tawj (lossis lwm yam khoom siv sib network) ua qhov sib txuas ncaj qha rau txhua tus thiab sib txuas lus ntawm ib lub xov tooj cua lossis cable. Cov tes hauj lwm yooj yim zoo li no tau muaj rau xyoo lawm. Ib qho siv rau cov tes hauj lwm no yog sib faib cov ntaub ntawv.
02 ntawm 06
Local Area Network (LAN) nrog Luam Ntawv
Daim duab no qhia txog ib cheeb tsam network (LAN) ib puag ncig. Cov chaw ua haujlwm hauv cheeb tsam hauv zos feem ntau muaj cov tshuab computer nyob hauv tsev, tsev kawm ntawv, lossis ib feem ntawm lub chaw ua haujlwm. Zoo li lub network yooj yooj yim, computers ntawm LAN tso tawm cov ntaub ntawv thiab cov luam ntawv. Cov kauj ruam ntawm LAN kuj tseem tuaj yeem sib txuas nrog lwm tus LANs thiab nrog hauv Internet.
03 ntawm 06
Cov Chaw Hauj Lwm Thoob Chaw
Daim duab no qhia txog ib qho teeb meem loj network (WAN) configuration uas koom nrog LANs hauv peb cheeb tsam chaw. Cov cheeb tsam dav dav dav npog thaj tsam loj xws li lub nroog, lub tebchaws lossis ntau lub tebchaws. WANs nquag siv ntau lub LANs thiab lwm qhov chaw me me. WANs yog tsim los ntawm cov tuam txhab loj sib txuas lus loj thiab lwm cov lag luam uas siv cov cuab yeej cuab tam uas tsis tshua muaj pom hauv khw muag khoom. Hauv Internet yog ib qho piv txwv ntawm WAN uas koom tes hauv zos thiab cheeb tsam hauv cheeb tsam thoob plaws lub ntiaj teb.
04 ntawm 06
Wired Computer Networks
Daim duab no qhia txog ntau hom kev thaiv hauv kev siv computer hauv. Hauv ntau lub tsev, cov kab txuas twist-pair Ethernet feem ntau yog siv los txuas nrog cov computers. Cov xov tooj hauv xov tooj los yog cable TV txuas nws lub tsev LAN mus rau Internet Service Provider (ISP) . ISPs, cov tsev kawm ntawv loj thiab cov lag luam feem ntau yais lawv cov khoom siv computer hauv racks (raws li qhia), thiab lawv siv ntau hom kab cable los koom nrog cov khoom siv hauv LAN thiab hauv Internet. Ntau ntau hauv Internet siv high-speed fiber optic cable los xa cov tsheb mus qis dua underground, tab sis cov khub thiab coaxial cable kuj siv tau rau cov kab xauj thiab hauv ntau thaj chaw.
05 ntawm 06
Wireless Computer tes hauj lwm
Daim duab no qhia txog ntau hom kab kev sib txuas ntawm wireless computer. WI-Fi yog tus qauv siv rau kev ua haujlwm hauv tsev wireless thiab lwm qhov chaw LAN. Cov lag luam thiab cov zej zog kuj siv tib lub tshuab fais fab Wi-nkaus los teeb tsa pej xeem wireless hotspots . Tom ntej, Bluetooth tes hauj lwm pub cov handhelds, xovtooj ntawm tes thiab lwm yam khoom siv sab nrauv los sib txuas lus txog cov sijhawm luv. Thaum kawg, cellular network yees nrog WiMax thiab LTE txhawb ob lub suab thiab cov ntaub ntawv sib txuas xov tooj txawb tes.
06 ntawm 06
OSI Qauv Ntawm Cov Haujlwm Khoos Kas Nais Khu
Daim duab no qhia txog Open Systems Interconnection (OSI) qauv . OSI feem ntau yog siv niaj hnub no raws li lub tswv yim qhia. Nws txhais tau tias siv lub network ua rau xya khaubncaws sab nraud povtseg nyob rau hauv txoj kev loj hlob zoo. Cov theem qis tshaj nrog hluav taws xob cov teeb tseg, chunks ntawm cov ntaub ntawv binary, thiab routing ntawm cov ntaub ntawv no thoob plaws tes hauj lwm. Cov theem siab muaj kev sib koom ua ke thiab cov lus teb, kev sawv cev ntawm cov ntaub ntawv, thiab cov txheej txheem network raws li pom los ntawm tus neeg siv qhov kev xam pom. OSI qauv yog xeeb txawm xeeb los ua ib tus qauv tsim qauv tsev network thiab nws qhov tseeb, ntau lub network fais fab niaj hnub niaj hnub tsim los ntawm cov qauv tsim ntawm OSI.