A host's authoritative name server provides the "official" translation of a hostname to an IP address (among other things). A host's local name server is a proxy to the DNS system: the host first queries its local name server for a mapping; the local name server then obtains the mapping on the behalf of the querying host.
authoritative dns server is server that has own databases that has name resolution for the clients that for resolve from name to ip address and for ip address to name. non-authorititative dns server is server that forward request of dns client to authoritative dns server for resolve.
What is the difference between a preferred DNS server and an altenate DNS server?Read more: http://wiki.answers.com/What_is_the_difference_between_a_preferred_DNS_server_and_an_altenate_DNS_server#ixzz2LRd3ICed
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.
The difference between the server and domains is fairly simple. The server is the system on which the entire functions rest, and the domains are pages within that system. Imagine the server as a neighborhood and domains as houses.
client is share to data storage in server
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SAP - Client (installed)/Server mySAP web browser (Client)/Server
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There is no such thing as SQL Server 2003. Microft released SQL Server 2005 as the next version of SQL Server 2000.
SOA 6 RFC 1035 Start of Authority. Defines the zone name, an e-mail contact and various time and refresh values applicable to the zone. NS 2 RFC 1035 Name Server. Defines the authoritative name server(s) for the domain (defined by the SOA record) or the subdomain.