IC693TCM302
IC693TCM302IC693TCM302
IP協(xié)議的主要功能-用途:在相互連接的網(wǎng)絡(luò)之間傳遞IP數(shù)據(jù)報(bào)。其中包括兩個(gè)部分:
(1)尋址與路由。
(a)用IP地址來(lái)標(biāo)識(shí)Internet的主機(jī):在每個(gè)IP數(shù)據(jù)報(bào)中,都會(huì)攜帶源IP地址和目標(biāo)IP地址來(lái)標(biāo)識(shí)該IP數(shù)據(jù)報(bào)的源和目的主機(jī)。IP數(shù)據(jù)報(bào)在傳輸過(guò)程中,每個(gè)中間節(jié)點(diǎn)(IP 網(wǎng)關(guān))還需要為其選擇從源主機(jī)到目的主機(jī)的合適的轉(zhuǎn)發(fā)路徑(即路由)。IP協(xié)議可以根據(jù)路由選擇協(xié)議提供的路由信息對(duì)IP數(shù)據(jù)報(bào)進(jìn)行轉(zhuǎn)發(fā),直至抵達(dá)目的主機(jī)。
(b)IP地址和MAC地址的匹配,ARP協(xié)議。數(shù)據(jù)鏈路層使用MAC地址來(lái)發(fā)送數(shù)據(jù)幀,因此在實(shí)際發(fā)送IP報(bào)文時(shí),還需要進(jìn)行IP地址和MAC地址的匹配,由TCP/IP協(xié)議簇中的ARP(地址解析協(xié)議)完成。
【公 司】: 廈門泰尼電氣有限公司
【主 營(yíng)】: AB、GE、施耐德等各類PLC產(chǎn)品
【價(jià) 格】: 電議
【發(fā)布人】: 張亮
【電 話】: 18030028083
【所在地】: 福建 - 廈門
【座 機(jī)】: 0592-6809819
【來(lái) 源】: 供應(yīng)信息 > 電工、電氣 > PLC
【Q Q】: 2314094943
(2) 分段與重組。
(a) IP數(shù)據(jù)報(bào)通過(guò)不同類型的通信網(wǎng)絡(luò)發(fā)送,IP數(shù)據(jù)報(bào)的大小會(huì)受到這些網(wǎng)絡(luò)所規(guī)定的最大傳輸單元(MTU)的限制。
(b)將IP數(shù)據(jù)報(bào)拆分成一個(gè)個(gè)能夠適合下層技術(shù)傳輸?shù)男?shù)據(jù)報(bào),被分段后的IP數(shù)據(jù)報(bào)可以獨(dú)立地在網(wǎng)絡(luò)中進(jìn)行轉(zhuǎn)發(fā),在到達(dá)目的主機(jī)后被重組,恢復(fù)成原來(lái)的IP數(shù)據(jù)報(bào)。NEW!! TADIRAN Coral AIR BASE STATION/D DECT
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