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  3. 學習啦>學習電腦>電腦入門>《電腦上網的基礎知識》正文

    電腦上網的基礎知識

    時間:2015-10-12 14:08:42本文內容及圖片來源于讀者投稿,如有侵權請聯系xuexila888@qq.com 廣達 我要投稿

      電腦上網我們經常,但是電腦是怎樣連接網絡的呢?下面是學習啦小編為大家整理的上網的基礎知識,希望大家能夠從中有所收獲!
     

      1. 什么是IP地址?

      IP地址:如“202.101.139.188”的形式。它是為每個連接在Internet上的主機分配的一個在全世界范圍內唯一的32位地址。IP地址通常以圓點(半角句號)分隔的4個十進制數字表示。為了方便通信,必須給每臺計算機都分配一個IP地址作為網絡標識。

      2. 什么是域名?

      域名:如“www.58116.cn”的形式。它同IP地址一樣,都是用來表示一個單位、機構或個人在網上的一個確定的名稱或位置。所不同的是,它比IP地址較有親和力,容易被人們記記和樂于使用。

    電腦上網的基礎知識

      3. 什么是DNS?

      域名系統即DNS(DomainNameSystem)。計算機在網絡上進行通訊時只能識別如“202.101.139.188”之類的IP地址,而不能識別如“www.lenovo.com.cn”之類的域名,因此,想要讓好記的域名能被網絡所認識,則需要在域名和網絡之間有一個“翻譯”,它能將域名翻譯成網絡能夠識別的IP地址,DNS起的正是這種作用。在互聯網訪問時選擇正確的DNS非常重要,它在很大程度上會影響上網和下載速度。

      4. 什么是ISP?

      ISP(InternetServiceProvider),互聯網服務提供商,即向廣大用戶綜合提供互聯網接入業務、信息業務、和增值業務的電信運營商。ISP是經國家主管部門批準的正式運營企業,享受國家法律保護。

      在互聯網應用服務產業鏈“設備供應商——基礎網絡運營商——內容收集者和生產者——業務提供者——用戶”中,ISP處于內容收集者、生產者以及業務提供者的位置。

      用戶要能上網,首先要有網絡環境選擇一家運營商接入網絡,運營商將為用戶分配IP、DNS,依照業務需求,通常電信接入的用戶運營商將自動分配電信DNS出口及電信IP,這給用戶上網體驗、速度等方面都是有利的。

    Copyright @ 2006 - 2018 學習啦 All Rights Reserved

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    我們采用的作品包括內容和圖片全部來源于網絡用戶和讀者投稿,我們不確定投稿用戶享有完全著作權,根據《信息網絡傳播權保護條例》,如果侵犯了您的權利,請聯系:xuexila888@qq.com,我站將及時刪除。

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