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07-01-13, 08:58 PM | #1 |
God of Gamer
註冊日期: Sep 2002
文章: 10,915
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NS -- Name server一問
A, AAAA, CNAME, MX都大置上明白,但NS又是甚麼?實際用途又是怎樣呢?
是否指: "假設有一個叫做example.com,這個名稱是由ns.nameserver.com提供,當外界想找example.com時,便經由ns.nameserver.com取得資料" 這一回事呢? 因為從hkdnr中看的資料就好像是這回事,例如YAHOO.COM.HK就有NS1.YAHOO.COM和NS5.YAHOO.COM 如果係咁樣,除了起DNS而出現的NS外,一間平常只會用到EXCHANGE的windows server中,假設整個NETWORK只得一部SERVER,而EXCHANGE就係裝係裡面,咁仲有冇必要加ns呢?有的話理由又是甚麼? 在google上看了不少中外網,但都係唔係好明
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幸せそうな人達をみていると、自分も幸せな雰囲気になれるんですよ 此篇文章於 07-01-13 09:08 PM 被 RPG之鬼 編輯。 |
07-02-13, 03:25 PM | #2 |
God of Gamer
Volks初音已接收
註冊日期: Dec 2010
文章: 9,253
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http://en.wikipedia.org/wiki/Root_name_server
A root name server is a name server for the Domain Name System's root zone. It directly answers requests for records in the root zone and answers other requests by returning a list of the authoritative name servers for the appropriate top-level domain (TLD). The root name servers are a critical part of the Internet infrastructure because they are the first step in translating (resolving) human readable host names into IP addresses that are used in communication between Internet hosts. A combination of limits in the DNS and certain protocols, namely the practical size of unfragmented User Datagram Protocol (UDP) packets, resulted in a decision to limit the number of root servers to 13 logical servers. To serve the needs of the public Internet worldwide, the number of root server instances is 359 as of 11 March 2013. How Domain Name System (DNS) Works Part 4: Actual Working Procedures of DNS http://www.mygreatname.com/how-dns-w...-dns-works.htm
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07-02-13, 05:37 PM | #3 |
God of Gamer
註冊日期: Sep 2002
文章: 10,915
|
THX
張圖O岩晒睇
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幸せそうな人達をみていると、自分も幸せな雰囲気になれるんですよ |
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