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An example SRV record in textual form that might be found in a zone file might be the following: _sip._tcp.example.com. 86400 IN SRV 0 5 5060 sipserver.example.com. This points to a server named sipserver.example.com listening on TCP port 5060 for Session Initiation Protocol (SIP) protocol services.
A graphical overview of all active DNS record types. This list of DNS record types is an overview of resource records (RRs) permissible in zone files of the Domain Name System (DNS). It also contains pseudo-RRs.
High-availability clusters (also known as HA clusters, fail-over clusters) are groups of computers that support server applications that can be reliably utilized with a minimum amount of down-time. They operate by using high availability software to harness redundant computers in groups or clusters that provide continued service when system ...
Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. Windows Server operating systems include it as a set of processes and services . [ 1 ] [ 2 ] Originally, only centralized domain management used Active Directory.
10 hosts, each having 50% availability. But if they are used in parallel and fail independently, they can provide high availability. So for example if each of your components has only 50% availability, by using 10 of components in parallel, you can achieve 99.9023% availability. Two kinds of redundancy are passive redundancy and active redundancy.
The format of a zone file is defined in RFC 1035 (section 5) and RFC 1034 (section 3.6.1). This format was originally used by the Berkeley Internet Name Domain (BIND) software package, but has been widely adopted by other DNS server software – though some of them (e.g. NSD, PowerDNS) are using the zone files only as a starting point to compile them into database format, see also Microsoft ...
Availability zones are typically geographically separated from one another, to prevent local disasters from acting on more than one availability zone. Some service providers also make higher-level regional distinctions between availability zones, allowing service providers to mitigate even regional-level disasters such as earthquakes and forest ...
A zone transfer uses the Transmission Control Protocol (TCP) for transport, [1] [2] and takes the form of a client–server transaction. The client requesting a zone transfer may be a secondary server requesting data from a primary server. [3] The portion of the database that is replicated is a zone.