西澳大学Assignment代写:决议的实施标准DNS

西澳大学Assignment代写:决议的实施标准DNS

西澳大学Assignment代写:决议的实施标准DNS

互联网的进步似乎不可阻挡的因为它是不断扩大。多年来,增长的速度已经越来越容易继续使用一个更广泛的传播网络,并把握它,DNS是至关重要的。本文阐述了企业网络DNS的效益,为该技术的优化部署必要的技术和管理的条件。这里所描述的方法是特别重要的组织与许多员工分布在多个位置[ 2 ]。DNS是一个翻译的名字的其他名称数据库。它把名字命名的IPv4地址,IPv6地址,名称,名称和名称的DNS数据库服务器。数据库极客会看到DNS是一个真正的分布式数据库,没有极客们可以看到每个点标志着一个另一个数据库可以使用,这使得共享管理和负载共享。负载也被广泛使用:在共享缓存DNS的每一个条目都有一个明确的“生存时间”控制多久可以存储在高速缓存中的项目。最佳的TTL值大约是三天。负载也由简单的负载共享:多个DNS服务器的层次结构中的每个部分都是允许的;复制

有四种类型的DNS服务器开始与大师。通过编辑“区域文件”,确定保持层次结构的元素所在的地方。区域传输,采用第二DNS服务器类型(奴隶),获得了区文件。的主人和奴隶回答询问他们的层次结构的一部分(他们被发现在他们的层次结构的一部分,他们的部分)。隐形奴隶有“区域转移”,但不被列为正式名称服务器。这是用于提高性能在许多DNS查询是为特定的区域;例如,邮件服务器做很多DNS查询,所以他们通常会运行一个隐身辅助DNS服务器。

所有DNS服务器做缓存响应查询的DNS服务器,如果没有区。步行,整个DNS层次走找到一个名字是很长一段时间的性能的提高。在aarnet3解析DNS名称可以是时间的最大部分在显示网页。代理也让较轻的主机软件,如主机不需要复杂的软件使用的DNS名称缓存。代理还作为一个应用程序特定的防火墙。如果你的路由器,除了通过货代没有DNS数据包从外面可以达到在里面[ 4您的主机的所有DNS】。

西澳大学Assignment代写:决议的实施标准DNS

The Internets progress seems unstoppable because it is continues expanding. For years now the rate of growth has been increasing to easily continue using a more widely spread Internet, and to keep a grip on it, DNS is vital. This article explains the benefit of DNS for business networks and the technological and administrative conditions necessary for the optimal deployment of this technology. The method described here is particularly important for organizations with many employees spread over multiple locations [2]. DNS is a database which translates names to other names. It translates names to IPv4 addresses, names to IPv6 addresses, names to names and even names to DNS database servers. Database geeks will see that the DNS is really a hierarchically distributed database, no geeks can see that each dot marks a point where another database can be used, and this allows shared management and sharing of the load. The load is also shared by extensive use of caching: every entry in the DNS has an explicit “time to live” which controls how long the item can be stored in a cache. The optimum TTL value is about three days. The load is also shared by simple load sharing: multiple DNS servers for each part of the hierarchy are allowed; replication is

There are four types of DNS servers started with masters. Masters identify as where an element of the hierarchy is maintained, by editing “zone files”. Zone transfer, which used by a second DNS servers type (Slaves), obtain a copy of zone file. The masters and slaves answer queries about their part of the hierarchy (they are found by NS records in the part of the hierarchy above them). A stealth slave has “zone transfer” but is not listed as an official name server. This is useful for improving performance where many DNS queries are made for a particular zone; for example, mail servers do many DNS lookups, so they will often run a DNS server with stealth secondary.

All DNS servers do is cache responses to queries if DNS servers with no zones. On foot, the walking of entire DNS hierarchy to find a name takes a long time is Performance’s improves. On AARNet3 resolving a DNS name can be the largest fraction of the time spent displaying a web page. Forwarders also allow lighter host software, as the hosts need not have complicated name caching software to use the DNS. Forwarders also act as an application specific firewall. If your router blocks all DNS other than through the forwarder then no DNS packet from the outside can reach your hosts on the inside [4].

 

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