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2. List of Internet top-level domains - Wikipedia

   en.wikipedia.org/wiki/List_of_Internet_top-level...

   This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ]

3. Email address - Wikipedia

   en.wikipedia.org/wiki/Email_address

   The format of an email address is local-part@domain, where the local-part may be up to 64 octets long and the domain may have a maximum of 255 octets. [5] The formal definitions are in RFC 5322 (sections 3.2.3 and 3.4.1) and RFC 5321—with a more readable form given in the informational RFC 3696 (written by J. Klensin, the author of RFC 5321 [6]) and the associated errata.

4. Extension Mechanisms for DNS - Wikipedia

   en.wikipedia.org/wiki/Extension_mechanisms_for_DNS

   Extension Mechanisms for DNS (EDNS) is a specification for expanding the size of several parameters of the Domain Name System (DNS) protocol which had size restrictions that the Internet engineering community deemed too limited for increasing functionality of the protocol.

5. Country code top-level domain - Wikipedia

   en.wikipedia.org/wiki/Country_code_top-level_domain

   An internationalized country code top-level domain (IDN ccTLD) is a top-level domain with a specially encoded domain name that is displayed in an end user application, such as a web browser, in its native language script or a non-alphabetic writing system, such as Latin script (.us, .uk and .br), Indic script (. भारत) and Korean script (.

6. Gmail continues to define email 15 years on - AOL

   www.aol.com/news/2019-04-01-gmail-15-years.html

   Today is April 1st, a day for pranks and corny jokes. One of the biggest culprits is Google, which comes up with a hoax every year (remember YouTube SnoopaVision or Google Play for Pets?). But on ...

7. Universal Acceptance - Wikipedia

   en.wikipedia.org/wiki/Universal_Acceptance

   This expansion of the Domain Name System’s Root Zone further exacerbated challenges associated with universal acceptance of these domain names. For the principles of Universal Acceptance to be realized, all valid domain names and email addresses must be accepted, validated, stored, processed and displayed correctly and consistently by all ...

8. Email alias - Wikipedia

   en.wikipedia.org/wiki/Email_alias

   An email alias may be used to create a simple replacement for a long or difficult-to-remember email address. It can also be used to create a generic email address such as webmaster@example.com and info@example.com. On UNIX-like systems, email aliases may be placed into the file /etc/aliases and have the form:

9. Domain Name System - Wikipedia

   en.wikipedia.org/wiki/Domain_Name_System

   The domain name space consists of a tree data structure. Each node or leaf in the tree has a label and zero or more resource records (RR), which hold information associated with the domain name. The domain name itself consists of the label, concatenated with the name of its parent node on the right, separated by a dot. [23]: §3.1