域名的概念与机制5（The concept and mechanism of domain name 5）.docVIP

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域名的概念与机制5（The concept and mechanism of domain name 5）.doc

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域名的概念与机制5（The concept and mechanism of domain name 5）

域名的概念与机制5（The concept and mechanism of domain name 5） 5. example In our example space, suppose we wish to root control among MIL, EDU, MIT.EDU and ISI.EDU, we can according to the distribution server name: (certification authority will be in parentheses) The root name server in C.ISI.EDU, SRI-NIC.ARPA and A.ISI.EDU, MIL domain by SRI-NIC.ARPA and A.ISI.EDU support; EDU domain by SRI-NIC.ARPA and C.ISI.EDU, have the server can be connected or not connected region, in this case, C.ISI.EDU and EDU and the root domain connections, connect A.ISI.EDU and MIL and the root domain, but there is not a connection and ISI.EDU. 5.1. C.ISI.EDU name server C.ISI.EDU IN is the root, MIL, EDU domain name server, also owns the domain area, area data to the root domain: These data may exist in the configuration file (master file). Most RR is one line, the only exception is SOA RR, which represents the end a multi line RR. Because all the RR of a region of the class must be the same, so the first RR only in the area of need to specify class. When the server is in a region, it set up all the authentication data TTL to less than SOA domain MINUMUM for a day or so, here is 86400 seconds. NS RR marker related server MIL and EDU domain, and it is associated with the RR address of the server, but NS RR is not in the authentication data. There are four RR and the root node related: a description of the root zone of RR, 3 for the list of root name server. In the SOA RR data in the description of the district management. Data stored by the host SRI-NIC.ARPA, the responsible party is HOSTMASTER@SRI-NIC.ARPA, the main entry SOA is 86400 seconds (TTL), which means that in all the authentication data is at least TTL, you can also specify a greater value of. The MIL and EDU domain NS RR standards and MIL root zone, EDU zone. Note that in this case the minimum area support server also supports the root zone. In the EDU configuration file (master file) must be relative to the source EDU settings in th