Ncaj-los ntawm
Ncaj-los ntawm ethernet transconses tuaj yeem to taub raws li kab matrix hloov pauv nrog cov kab sib txuas ntawm cov kab av. Thaum cov ntaub ntawv cov ntaub ntawv raug kuaj pom ntawm qhov chaw nres nkoj hauv pob khoom, lub hom phiaj ntawm cov pob khoom txuas tau pib, thiab cov ntawv tso tawm sab hauv tau hloov dua siab tshiab. Cov pob ntawv cov ntaub ntawv txuas nrog ntawm kev sib txuas ntawm cov lus qhia thiab tso zis, thiab cov ntaub ntawv ntaub ntawv tau txuas ncaj qha rau cov chaw nres nkoj uas tau hloov kho. Vim tias nws tsis tas yuav tsum tau khaws cia, ncua qeeb heev thiab hloov tau nrawm heev, uas yog nws tau txais txiaj ntsig. Qhov tsis zoo yog tias txij li cov ntsiab lus ntawm cov ntaub ntawv pob ntawv tsis tau txais kev cawmdim tsis yog qhov tsis raug, thiab qhov yuam kev yuav tsum tsis tuaj yeem muab tau. Vim tias tsis muaj cache, cov tswv yim / tso zis chaw nres tsheb ntawm kev sib txawv tsis tuaj yeem txuas ncaj qha rau, thiab nws yooj yim kom poob.
Khw thiab rau pem hauv ntej
Khw thiab Forward hom yog ib qho kev thov hom hauv cov duab ntawm lub computer tes hauj lwm. Nws thawj zaug khaws cov ntaub ntawv ntawm cov ntaub ntawv tawm suab, tom qab ntawd ua tiav qhov chaw nyob pov thawj tom qab cov ntaub ntawv pov thawj cov ntaub ntawv xa tawm cov pob ntawv sau tawm los xa cov pob ntawv los ntawm cov pob ntawv tshawb. Vim tias qhov no, kev ncua ntawm kev cia khoom thiab xa mus rau hauv cov ntaub ntawv ua yog loj, tab sis nws tuaj yeem ntes cov ntaub ntawv cov ntaub ntawv nkag mus rau lub pob nyem nkag mus thiab txhim kho kev ua haujlwm network. Qhov tseem ceeb tshwj xeeb yog tias nws tuaj yeem pab txhawb kev hloov pauv ntawm cov chaw nres nkoj ntawm kev sib txawv thiab tswj kev sib koom tes ntawm cov chaw nres nkoj nrawm nrawm thiab cov chaw nres tsheb qis.
Cov lus tsis raug
Qhov no yog kev daws teeb meem ntawm thawj ob. Nws txheeb xyuas seb qhov ntev ntawm cov ntaub ntawv pob ntawv yog txaus rau 64 bytes. Yog tias nws tsawg dua 64 bytes, nws txhais tau tias nws yog pob ntawv cuav thiab pob ntawv tau muab pov tseg; Yog tias nws muaj ntau dua 64 bytes, pob ntawv xa. Hom no tsis muab cov ntaub ntawv pov thawj cov ntaub ntawv. Nws cov ntaub ntawv ua nrawm nrawm dua li kev cia khoom thiab xa rov qab, tab sis qeeb dua li kev xa mus ncaj qha. Qhia cov kev hloov ntawm Hirshchman hloov.
Nyob rau tib lub sijhawm, tus hirschman hloov tuaj yeem xa cov ntaub ntawv ntawm ntau cov chaw nres nkoj. Txhua qhov chaw nres nkoj tuaj yeem suav tias yog ntu kev ywj pheej ntawm kev ywj pheej (CEEB TOOM Thaum node xa cov ntaub ntawv rau ntawm D, Node B tuaj yeem xa cov ntaub ntawv rau ntawm C nyob rau tib lub sijhawm, thiab ob qho tib si muaj kev sib txuas tag nrho. Yog tias 10mbps Ethernet hloov yog siv, tag nrho cov tsheb khiav ntawm tus hloov pauv yog sib npaug rau 2x10Mbps = 20Mbps. Thaum lub 10MBPS sib koom Hub yog siv, tag nrho cov tsheb khiav ntawm Hub yuav tsis pub tshaj 10Mbps.
Hauv ntej, tusHirschman Hloovyog lub network ntaus ntawv uas tuaj yeem ua tiav txoj haujlwm ntawm encapsulating thiab xa cov ntaub ntawv thav ntawv raws li Mac chaw tsim txiaj. Tus Hirschman hloov tuaj yeem kawm MAC chaw nyob thiab khaws cia rau hauv lub hom phiaj chaw nyob sab hauv, thiab mus ncaj qha rau lub hauv paus nruab nrab thiab lub hom phiaj tau txais ntawm cov ntaub ntawv thav duab.
Lub Sijhawm Post: Kaum-12-2024