Virtual Private Network
A Virtual Private Network (VPN) is a computer network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (such as the Internet), as opposed to running across a single private network. The Link Layer protocols of the virtual network are said to be tunneled through the larger network. One common application is secure communications through the public Internet, but a VPN does not need to have explicit security features such as authentication or content encryption. For example,VPNscan also be used to separate the traffic of different user communities over an underlying network with strong security features, or to provide access to a network via customized or private routing mechanisms.[1]
- Virtual Private Network [EN] @ Wikipedia
- Virtual Private Network [DE] @ Wikipedia
Implementations
Extension:DynamicPageList3 (DPL3), version 3.6.4: Error: Error 1054: Unknown column 'ecl1.cl_to' in 'where clause' Function: MediaWiki\Extension\DynamicPageList3\Query::buildAndSelect - Virtual_Private_Network Query: SET STATEMENT max_statement_time=10 FOR SELECT DISTINCT IFNULL(cl1.cl_sortkey, REPLACE(CONCAT(CASE `wp_page`.page_namespace WHEN 1 THEN 'Talk:' WHEN 2 THEN 'User:' WHEN 3 THEN 'User_talk:' WHEN 4 THEN 'RaySoft:' WHEN 5 THEN 'RaySoft_talk:' WHEN 6 THEN 'File:' WHEN 7 THEN 'File_talk:' WHEN 8 THEN 'MediaWiki:' WHEN 9 THEN 'MediaWiki_talk:' WHEN 10 THEN 'Template:' WHEN 11 THEN 'Template_talk:' WHEN 12 THEN 'Help:' WHEN 13 THEN 'Help_talk:' WHEN 14 THEN 'Category:' WHEN 15 THEN 'Category_talk:' END, `wp_page`.page_title), '_', ' ')) AS `sortkey`,`wp_page`.page_namespace AS `page_namespace`,`wp_page`.page_id AS `page_id`,`wp_page`.page_title AS `page_title` FROM `wp_page` `wp_page` JOIN `wp_categorylinks` `cl1` ON ((`wp_page`.page_id = cl1.cl_from AND cl1.cl_to = 'Virtual_Private_Network')) JOIN `wp_categorylinks` `cl2` ON ((`wp_page`.page_id = cl2.cl_from AND (cl2.cl_to = 'Suite' OR cl2.cl_to = 'Server' OR cl2.cl_to = 'Application' OR cl2.cl_to = 'Shell_Command' OR cl2.cl_to = 'Add-on'))) LEFT OUTER JOIN `wp_categorylinks` `ecl1` ON ((`wp_page`.page_id = ecl1.cl_from AND ecl1.cl_to ='Component')) WHERE `wp_page`.page_is_redirect = 0 AND `wp_page`.page_namespace = 0 AND ecl1.cl_to IS NULL ORDER BY sortkey ASC LIMIT 500