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57C400-1 控制模塊
  • 57C400-1 控制模塊
  • 57C400-1 控制模塊

57C400-1 控制模塊

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型號(hào)：
57C400-1
成色：
全新 | 保修365天
期貨：
期貨 7天內(nèi)發(fā)貨
數(shù)量：
（庫(kù)存6000件）
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57C400-1 控制模塊

￥ 價(jià)格面議

易賣(mài)工控網(wǎng)（news.tpt0.cn）提供”57C400-1 控制模塊”，產(chǎn)品詳情：品牌/廠家：其他品牌、型號(hào)：57C400-1、成色：全新、貨期：期貨 7天內(nèi)發(fā)貨、保修：365天，更多產(chǎn)品詳情就上易賣(mài)工控網(wǎng)。

?

?

目前以太網(wǎng)接入方式主要有3種：固定IP，DHCP，PPPOE，而PPPOE+VLAN是一種比較理想的寬帶接入方式。

? ?? ?? ?? ?　　1、寬帶接入網(wǎng)需要實(shí)現(xiàn)的基本功能

? ?? ?? ?? ?　　寬帶接入網(wǎng)需要實(shí)現(xiàn)的基本功能可以歸納為以下幾個(gè)方面：
? ?? ?? ?? ?


? ?? ?? ?? ?　　(1)用戶管理

? ?? ?? ?? ?　　掌握用戶的信息，在用戶進(jìn)行通信時(shí)對(duì)用戶進(jìn)行認(rèn)證、授權(quán)，使合法用戶方便快捷地接入網(wǎng)中，杜絕非法用戶接入，防止非法用戶占用網(wǎng)絡(luò)資源。

? ?? ?? ?? ?　　(2)安全管理

? ?? ?? ?? ?　　合法用戶在通信時(shí)要保障其數(shù)據(jù)的安全性，隔離帶有用戶個(gè)人信息的數(shù)據(jù)包，對(duì)于主要的網(wǎng)絡(luò)設(shè)備防止其受到攻擊而造成網(wǎng)絡(luò)癱瘓。由于用戶終端是以普通網(wǎng)卡與網(wǎng)絡(luò)設(shè)備相連，在通信時(shí)會(huì)發(fā)送一些廣播地址的幀(如ARP，DHCP消息等)，而這些消息會(huì)攜帶用戶的個(gè)人信息(如用戶的MAC地址)，如不隔離這些消息讓其他用戶接收到，容易發(fā)生MAC/IP地址的仿冒，影響合法用戶上網(wǎng)。對(duì)于運(yùn)營(yíng)商來(lái)說(shuō)，保護(hù)其系統(tǒng)設(shè)備的安全性，防止惡意攻擊是十分重要的。













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易賣(mài)工控網(wǎng)供應(yīng)商瑞恩plc專(zhuān)賣(mài)店為您提供57C400-1 控制模塊的詳細(xì)產(chǎn)品價(jià)格、產(chǎn)品圖片等產(chǎn)品介紹信息，您可以直接聯(lián)系商家獲取57C400-1 控制模塊的具體資料，聯(lián)系時(shí)請(qǐng)說(shuō)明是在易賣(mài)工控網(wǎng)看到的。

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內(nèi)容聲明：
易賣(mài)工控為第三方交易平臺(tái)及互聯(lián)網(wǎng)信息服務(wù)提供者，易賣(mài)工控所展示的商品/服務(wù)的標(biāo)題、價(jià)格、詳情等信息內(nèi)容系由店鋪經(jīng)營(yíng)者發(fā)布，其真實(shí)性、準(zhǔn)確性和合法性均由店鋪經(jīng)營(yíng)者負(fù)責(zé)。易賣(mài)提醒用戶購(gòu)買(mǎi)商品/服務(wù)前注意謹(jǐn)慎核實(shí)。如用戶對(duì)商品/服務(wù)的標(biāo)題、價(jià)格、詳情等任何信息有任何疑問(wèn)的，請(qǐng)?jiān)谫?gòu)買(mǎi)前與店鋪經(jīng)營(yíng)者溝通確認(rèn)；易賣(mài)工控存在海量店鋪，如用戶發(fā)現(xiàn)店鋪內(nèi)有任何違法/侵權(quán)信息，請(qǐng)立即向易賣(mài)工控舉報(bào)并提供有效線索。

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