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IP地址是一個(gè)網(wǎng)卡在網(wǎng)絡(luò)世界的通訊地址，相當(dāng)于我們現(xiàn)實(shí)世界中的門牌號(hào)。

例如：103.53.125.1這個(gè)IP（IPV4）地址它被分為四個(gè)部分，每個(gè)部分分為6bit，所以一個(gè)IP地址總共有32位。

而我們今天的IP103.53.215.1就屬于B類IP地址

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在目前網(wǎng)絡(luò)的設(shè)計(jì)中，IP地址主要由A、B、C三類區(qū)分，前面一部分是網(wǎng)絡(luò)后，后面的則是主機(jī)號(hào)．

A類IP地址 一個(gè)A類IP地址由1字節(jié)的網(wǎng)絡(luò)地址和3字節(jié)主機(jī)地址組成，網(wǎng)絡(luò)地址的最高位必須是“0”， 地址范圍1.0.0.1-126.255.255.254可用的A類網(wǎng)絡(luò)有126個(gè)，每個(gè)網(wǎng)絡(luò)能容納1億多個(gè)主機(jī)。

2．B類IP地址 一個(gè)B類IP地址由2個(gè)字節(jié)的網(wǎng)絡(luò)地址和2個(gè)字節(jié)的主機(jī)地址組成，網(wǎng)絡(luò)地址的最高位必須是“10”，地址范圍128.0.0.1-191.255.255.254?？捎玫腂類網(wǎng)絡(luò)有16382個(gè)，每個(gè)網(wǎng)絡(luò)能容納6萬(wàn)多個(gè)主機(jī) 。

3．C類IP地址 一個(gè)C類IP地址由3字節(jié)的網(wǎng)絡(luò)地址和1字節(jié)的主機(jī)地址組成，網(wǎng)絡(luò)地址的最高位必須是“110”。范圍192.0.0.1-223.255.255.254C類網(wǎng)絡(luò)可達(dá)209萬(wàn)余個(gè)，每個(gè)網(wǎng)絡(luò)能容納254個(gè)主機(jī)。

4．D類地址用于多點(diǎn)廣播。 D類IP地址第一個(gè)字節(jié)以“l(fā)ll0”開始，它是一個(gè)專門保留的地址。它并不指向特定的網(wǎng)絡(luò)，目前這一類地址被用在多點(diǎn)廣播中。多點(diǎn)廣播地址用來(lái)一次尋址一組計(jì)算機(jī)，它標(biāo)識(shí)共享同一協(xié)議的一組計(jì)算機(jī)。 地址范圍224.0.0.1-239.255.255.2545．E類IP地址 以“l(fā)lll0”開始，為將來(lái)使用保留。 全零（“0．0．0．0”）地址對(duì)應(yīng)于當(dāng)前主機(jī)。全“1”的IP地址（“255．255．255．255”）是當(dāng)前子網(wǎng)的廣播地址。

例如馳網(wǎng)江蘇揚(yáng)州高防BGP線路103.53.125.xxx ??IP段用于網(wǎng)絡(luò)建站、游戲、大帶寬視頻、直播業(yè)務(wù)IP段如下

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103.53.125.1

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