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General guide to domain registration and dns

A domain name ensures that your website is accessible in a simple way. There are several possible domain extensions (top level domains, short TLDs). A domain name should be minimum of 2 and maximum of 63 characters to exist It may consist of letters, numbers and the hyphen (minus sign). The name should not contain capitals and spaces.

The Domain Name System (DNS) protocol imposes restrictions on what the characters allowed in the labels of domain names. One of these limitations is the LDH rule  which states that a label may contain. Only alphanumeric characters and the hyphen in the ASCII character set It should also prevent the hyphen in front or back of a label. To prevent the existing DNS infrastructure must be adapted to support non-ASCII characters, it was decided to design where web browsers (and other user applications a system ) converting the non-ASCII labels in a domain name to ASCII labels. Internationalized Domain Names in Applications (IDNA) specifies how this conversion should be done. For the conversion of a non-ASCII label to an ASCII label, first use the Name Prep algorithm . Name Prep performs various normalizations of as converting uppercase to lowercase. The result of this operation is then is reacted via Punycode to an ASCII label. Afterwards the prefix xn - added. The result is the so-called ASCII Compatible Encoding (ACE)-string.

The Domain Name System (DNS) is the system and network protocol that the Internet is used to machine names to numerical addresses ( IP addresses to be translated) and vice versa. Although this "translation" is mentioned it is simply a lookup table, which names associated with numbers.

DNS is a client-server system : a requestor ( client ) uses the DNS protocol to a provider (DNS server to request that the server sends back a response) a name or address. Looking up a phone number with a name lookup said, looking up a name in a number reverse lookup.

Every computer connected to the Internet must have an IP address from a distance to be reached, such a computer is a host named because he serves as host to the user make of remote use. Because such numbers for those difficult to remember, each computer was also assigned a name, and was in the software that allows Internet connections that could be built by looking in a table. Their number such names used

This table was initially a file, / etc / hosts (sometimes hosts.txt ), which had to be. present on each computer participating in Internet traffic

As the number and size of the participating networks grew, the updating of that file on each participating computer impractical. Therefore, the DNS protocol has been designed so that this information could be retrieved. Even over the Internet This allows an organization to names always adjust the allocation of numbers without necessary for the implementation of that change in others explicit actions.

All software that supports Internet connections using DNS, but still the hosts file. Sometimes this last file are used to give local computers-for example-a simple name or temporarily for a specific host to ignore the DNS system - sometimes useful when testing a new website which is now yet another URL or is running locally . A 2nd application is to include a list of domain names that are classified as undesirable and in the hosts file has a reference to another address (a DNS server) as to 127.0.0.1. Anti-abuse products such as Spybot Search & Destroy also make use of.