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When would a dns server contact a root server?
If a DNS server cannot find the answer to the DNS Query in its own database it will first query the forwarders (if there are any configured) and then ask the root server. root servers (by default) are the master DNS servers of the Internet.
What is the purpose of a root server in DNS?
If a DNS server cannot find the answer to the DNS Query in its own database it will first query the forwarders (if there are any configured) and then ask the root server. root servers (by default) are the master DNS servers of the Internet. The are called A, B, C, ... These are the highest level of the DNS hierarchy. Ultimately, any DNS request that can't be solved at a lower level (through the use of a cache) is traced back to those 13 root servers. Them root server in general is . .com,.org etc but in your domain the first dc in the forest/domain is the one
Where does a dns server look when it can't resolve a query from its zone records or cache?
When a DNS server cannot resolve a query from its zone records or cache, it typically forwards the query to a higher-level DNS server, such as a root DNS server or a server authoritative for the domain in question. The root servers provide information about the authoritative servers for top-level domains (TLDs). The DNS server then recursively queries these TLD servers until it reaches the authoritative server for the specific domain, which can then provide the requested information. If the authoritative server is unreachable or does not have the record, the query will ultimately fail.
What does Disable Recursion in DNS mean?
HiIn the Windows 2000/2003 DNS console (dnsmgmt.msc), under a server's Properties -> Forwarders tab is the setting Do not use recursion for this domain. On the Advanced tab you will find the confusingly similar option Disable recursion (also disables forwarders). Recursion refers to the action of a DNS server querying additional DNS servers (e.g. local ISP DNS or the root DNS servers) to resolve queries that it cannot resolve from its own database. So what is the difference between these settings? The DNS server will attempt to resolve the name locally, then will forward requests to any DNS servers specified as forwarders. If Do not use recursion for this domain is enabled, the DNS server will pass the query on to forwarders, but will not recursively query any other DNS servers (e.g. external DNS servers) if the forwarders cannot resolve the query. If Disable recursion (also disables forwarders) is set, the server will attempt to resolve a query from its own database only. It will not query any additional servers. If neither of these options is set, the server will attempt to resolve queries normally:... the local database is queried... if an entry is not found, the request is passed to any forwarders that are set... if no forwarders are set, the server will query servers on the Root Hints tab to resolve queries beginning at the root domains.Hope this is helpful rk
How many roots hints servers available worldwide?
There are only 13 root hint servers and over 1000 root DNS servers avalable on the internet
How many DNS root server in the world?
there are many hundreds of root DNS servers around the world . And there are 13 organisation responsible for the management of these servers . In India , there are three root servers located in Mumbai , Delhi and Chennai .References : -http://www.iana.org/domains/root/servershttp://www.apnic.net/community/support/root-servershttp://blog.icann.org/2007/11/there-are-not-13-root-servers/
How many root servers that control the overall DNS lookup process for the entire Internet?
There are in total 13 main Public-Root Servers.
What could cause the Forwarders and Root Hints to be grayed out?
Win2K configured your DNS server as a private root server
How do domain name systems work?
In principle, authoritative name servers are sufficient for the operation of the Internet. However, with only authoritative name servers operating, every DNS query must start with recursive queries at the root zone of the Domain Name System and each user system must implement resolver software capable of recursive operation.
The root DNS servers know the location of all the DNS servers that contain the master listings for an entire?
top level
Why does my Java server crash on Ubuntu Linux when it didn't on Windows XP?
You may not have configured it correctly, or their may be a bug in the version Ubuntu has in their repositories. Servers also usually need to be started as root (most users in Windows already have full admin rights, so the problem never came up).
What special structural characters does the root epidermis posses to perform these function?
The special structural character that the root epidermis possess is the root hairs which enables it perform its functions effectively.
