Tika tonu
Ka taea te mārama ki ngā pana Ethernet tika-mā roto he pana matihiko rārangi me ngā rārangi whakawhiti i waenga i ngā tauranga. Ina kitea he kete raraunga i te tauranga whakauru, ka tirohia te pane o te kete, ka whiwhi i te wāhitau ūnga o te kete, ka tīmata te ripanga rapu hihiri ā-roto, ā, ka hurihia te tauranga putanga e rite ana. Ka honoa te kete raraunga i te wāhi e honoa ai te whakauru me te putanga, ā, ka honoa tika te kete raraunga ki te tauranga e rite ana hei whakatutuki i te mahi whakawhiti. Nā te mea kāore e hiahiatia kia rongoatia, he iti rawa te whakaroa, ā, he tere rawa te whakawhiti, koinei tōna painga. Ko te ngoikoretanga, nā te mea kāore te ihirangi o te kete raraunga e tiakina e te pana Ethernet, kāore e taea te tirotiro mēnā he hē te kete raraunga kua tukuna, ā, kāore e taea te whakarato i te āheinga kimi hapa. Nā te mea kāore he keteroki, kāore e taea te hono tika i ngā tauranga whakauru/putanga o ngā tere rerekē, ā, he ngāwari ki te ngaro.
Penapena me te tuku whakamua
Ko te aratau penapena me te tuku whakamua he aratau tono i roto i te ao whatunga rorohiko. Ka rongoa tuatahi i te kete raraunga o te tauranga whakauru, kātahi ka mahi i te tirotiro CRC (cyclic redundancy code verification), ka tangohia te wāhitau ūnga o te kete raraunga i muri i te tukatuka i te kete hapa, ka hurihia ki te tauranga putanga hei tuku i te kete mā te ripanga rapu. Nā tēnei, he nui te whakaroa o te rokiroki me te tuku whakamua i roto i te tukatuka raraunga, koinei tōna ngoikoretanga, engari ka taea e ia te kite hē i ngā kete raraunga e tomo ana ki te pana me te whakapai ake i te mahi whatunga. Ko te mea nui ko te taea e ia te tautoko i te tahuritanga i waenga i ngā tauranga o ngā tere rerekē me te pupuri i te mahi tahi i waenga i ngā tauranga tere-tiketike me ngā tauranga tere-iti.
Wehenga wāhanga
He otinga tēnei i waenganui i ngā mea tuatahi e rua. Ka tirohia mēnā he nui te roa o te kete raraunga mō te 64 paita. Mēnā he iti iho i te 64 paita, ko te tikanga he kete rūpahu, ā, ka makahia te kete; ki te nui atu i te 64 paita, ka tukuna te kete. Kāore tēnei tikanga e whakarato manatoko raraunga. He tere ake tōna tere tukatuka raraunga i te rokiroki me te tuku whakamua, engari he puhoi ake i te tuku tika. Te whakauru i te whakawhiti o te pana Hirschman.
I taua wā anō, ka taea e te pana Hirschman te tuku raraunga i waenga i ngā tauranga maha. Ka taea te kī ko ia tauranga he wāhanga whatunga tūturu motuhake (tuhia: wāhanga whatunga ehara i te IP), ā, ka taea e ngā taputapu whatunga e hono ana ki a ia te whakamahi i te whānui o te whatunga katoa me te kore e whakataetae ki ētahi atu taputapu. Ina tukuna e te pūnga A ngā raraunga ki te pūnga D, ka taea e te pūnga B te tuku raraunga ki te pūnga C i te wā kotahi, ā, kei a rāua te whānui katoa o te whatunga, ā, he hononga mariko anō hoki tā rāua. Mena ka whakamahia he pana Ethernet 10Mbps, ko te tapeke o te waka o te pana he ōrite ki te 2x10Mbps=20Mbps. Ina whakamahia he HUB tiritahi 10Mbps, kāore te tapeke o te waka o te HUB e neke ake i te 10Mbps.
I roto i te poto, ko tePātene HirschmanHe taputapu whatunga ka taea te whakaoti i te mahi o te whakakōpaki me te tuku anga raraunga i runga i te mōhiotanga wāhitau MAC. Ka taea e te pana Hirschman te ako i ngā wāhitau MAC me te penapena i aua wāhitau ki roto i te ripanga wāhitau ā-roto, ā, ka tae tika atu ki te ūnga mā te pana rangitahi i waenga i te pūtake me te kaiwhiwhi ūnga o te anga raraunga.
Wā tuku: Hakihea-12-2024