{"id":479445,"date":"2023-08-09T10:40:10","date_gmt":"2023-08-09T10:40:10","guid":{"rendered":""},"modified":"2023-09-05T11:18:49","modified_gmt":"2023-09-05T11:18:49","slug":"universally-unique-identifier","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/universally-unique-identifier\/","title":{"rendered":"M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u"},"content":{"rendered":"<p>Th\u00f4ng tin t\u00f3m t\u1eaft v\u1ec1 M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u<\/p>\n<p>M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u (UUID) l\u00e0 s\u1ed1 128 bit \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00f4ng tin trong h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u1eafn nh\u00e3n d\u1eef li\u1ec7u v\u1edbi m\u1ed9t tham chi\u1ebfu duy nh\u1ea5t m\u00e0 kh\u00f4ng c\u1ea7n d\u1ef1a v\u00e0o c\u01a1 quan trung \u01b0\u01a1ng ho\u1eb7c s\u1ef1 ph\u1ed1i h\u1ee3p gi\u1eefa c\u00e1c b\u00ean.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a m\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>UUID l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a H\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh m\u1ea1ng Apollo v\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 1980. \u0110\u1eb7c t\u1ea3 ti\u00eau chu\u1ea9n h\u00f3a \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c xu\u1ea5t b\u1ea3n v\u00e0o n\u0103m 1990 nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a M\u00f4i tr\u01b0\u1eddng \u0111i\u1ec7n to\u00e1n ph\u00e2n t\u00e1n (DCE) c\u1ee7a T\u1ed5 ch\u1ee9c ph\u1ea7n m\u1ec1m m\u1edf (OSF). K\u1ec3 t\u1eeb \u0111\u00f3, UUID \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ti\u00eau chu\u1ea9n chung \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean nhi\u1ec1u h\u1ec7 th\u1ed1ng v\u00e0 giao th\u1ee9c.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1<\/h2>\n<p>UUID \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong x\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng s\u1ed1 nh\u1eadn d\u1ea1ng duy nh\u1ea5t tr\u00ean c\u00e1c h\u1ec7 th\u1ed1ng, thi\u1ebft b\u1ecb v\u00e0 th\u1eddi \u0111i\u1ec3m. Ti\u00eau chu\u1ea9n ISO\/IEC 9834-8:2014 x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh th\u1ee9c c\u1ee7a UUID. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau, t\u1eeb h\u1ec7 th\u1ed1ng t\u1ec7p \u0111\u1ebfn kh\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u<\/h2>\n<p>UUID bao g\u1ed3m n\u0103m ph\u1ea7n: m\u1ee9c th\u1ea5p th\u1eddi gian 32 bit, th\u1eddi gian gi\u1eefa 16 bit, phi\u00ean b\u1ea3n cao v\u00e0 th\u1eddi gian 16 bit, xung nh\u1ecbp 8 bit-seq-v\u00e0-d\u1ef1 tr\u1eef, xung nh\u1ecbp 8 bit-seq- n\u00fat th\u1ea5p v\u00e0 48 bit. B\u1ed1 c\u1ee5c cung c\u1ea5p \u0111\u1ee7 ph\u01b0\u01a1ng sai \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng vi\u1ec7c tr\u00f9ng l\u1eb7p l\u00e0 kh\u00f4ng th\u1ec3 x\u1ea3y ra.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u<\/h2>\n<ul>\n<li><strong>T\u00ednh duy nh\u1ea5t:<\/strong> T\u00ednh n\u0103ng ch\u00ednh c\u1ee7a UUID l\u00e0 t\u00ednh duy nh\u1ea5t c\u1ee7a n\u00f3 theo kh\u00f4ng gian v\u00e0 th\u1eddi gian.<\/li>\n<li><strong>D\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n:<\/strong> \u0110\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf.<\/li>\n<li><strong>Kh\u00f4ng c\u00f3 c\u01a1 quan trung \u01b0\u01a1ng:<\/strong> UUID c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o \u0111\u1ed9c l\u1eadp b\u1edfi c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau m\u00e0 kh\u00f4ng c\u1ea7n c\u01a1 quan trung \u01b0\u01a1ng.<\/li>\n<li><strong>T\u00ednh linh ho\u1ea1t:<\/strong> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau t\u1eeb h\u1ec7 th\u1ed1ng t\u1eadp tin \u0111\u1ebfn giao th\u1ee9c m\u1ea1ng.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i m\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u<\/h2>\n<p>C\u00f3 n\u0103m phi\u00ean b\u1ea3n UUID, m\u1ed7i phi\u00ean b\u1ea3n ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>Phi\u00ean b\u1ea3n<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>D\u1ef1a tr\u00ean \u0111\u1ecba ch\u1ec9 MAC v\u00e0 d\u1ea5u th\u1eddi gian<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>B\u1ea3o m\u1eadt DCE, v\u1edbi UID POSIX<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>D\u1ef1a tr\u00ean h\u00e0m b\u0103m MD5 v\u00e0 m\u1ed9t kh\u00f4ng gian t\u00ean<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>\u0110\u01b0\u1ee3c t\u1ea1o ng\u1eabu nhi\u00ean<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>D\u1ef1a tr\u00ean h\u00e0m b\u0103m SHA-1 v\u00e0 v\u00f9ng t\u00ean<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng M\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<p>UUID \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau:<\/p>\n<ul>\n<li><strong>C\u01a1 s\u1edf d\u1eef li\u1ec7u:<\/strong> L\u00e0 kh\u00f3a duy nh\u1ea5t cho h\u1ed3 s\u01a1.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng t\u1eadp tin:<\/strong> \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh duy nh\u1ea5t c\u00e1c t\u1eadp tin.<\/li>\n<li><strong>K\u1ebft n\u1ed1i m\u1ea1ng:<\/strong> \u0110\u1ec3 nh\u1eadn d\u1ea1ng phi\u00ean.<\/li>\n<\/ul>\n<p><strong>C\u00e1c v\u1ea5n \u0111\u1ec1:<\/strong><\/p>\n<ul>\n<li><strong>S\u1ef1 va ch\u1ea1m:<\/strong> Hi\u1ebfm khi x\u1ea3y ra va ch\u1ea1m.<\/li>\n<li><strong>Hi\u1ec7u su\u1ea5t:<\/strong> Th\u1ebf h\u1ec7 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/li>\n<\/ul>\n<p><strong>C\u00e1c gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng phi\u00ean b\u1ea3n 4:<\/strong> Gi\u1ea3m kh\u1ea3 n\u0103ng va ch\u1ea1m.<\/li>\n<li><strong>Th\u01b0 vi\u1ec7n \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a:<\/strong> S\u1eed d\u1ee5ng c\u00e1c th\u01b0 vi\u1ec7n hi\u1ec7u qu\u1ea3 \u0111\u1ec3 t\u1ea1o UUID.<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 nh\u1eefng so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<ul>\n<li><strong>UUID so v\u1edbi GUID:<\/strong> GUID l\u00e0 m\u1ed9t tri\u1ec3n khai UUID c\u1ee7a Microsoft. C\u1ea3 hai \u0111\u1ec1u l\u00e0 gi\u00e1 tr\u1ecb 128 bit v\u00e0 GUID th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau b\u1eb1ng UUID.<\/li>\n<li><strong>T\u00ednh duy nh\u1ea5t tr\u00ean c\u00e1c h\u1ec7 th\u1ed1ng:<\/strong> Kh\u00f4ng gi\u1ed1ng nh\u01b0 ID c\u1ee5c b\u1ed9, UUID duy tr\u00ec t\u00ednh duy nh\u1ea5t tr\u00ean c\u00e1c h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn m\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u<\/h2>\n<p>C\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng UUID \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c, \u0111\u1ed3ng th\u1eddi c\u00e1c phi\u00ean b\u1ea3n m\u1edbi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n m\u1eadt m\u00e3.<\/p>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi m\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy nh\u01b0 m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng UUID \u0111\u1ec3 nh\u1eadn d\u1ea1ng duy nh\u1ea5t c\u00e1c phi\u00ean c\u1ee7a ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c theo d\u00f5i c\u00e1c g\u00f3i d\u1eef li\u1ec7u. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng UUID, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd k\u1ebft n\u1ed1i m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng b\u1ecb xung \u0111\u1ed9t, \u0111\u1ed3ng th\u1eddi duy tr\u00ec quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc4122\" target=\"_new\" rel=\"noopener nofollow\">RFC 4122: Kh\u00f4ng gian t\u00ean URN \u0111\u1ecbnh danh duy nh\u1ea5t to\u00e0n c\u1ea7u (UUID)<\/a><\/li>\n<li><a href=\"https:\/\/www.iso.org\/standard\/66146.html\" target=\"_new\" rel=\"noopener nofollow\">ISO\/IEC 9834-8:2014<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/\" target=\"_new\" rel=\"noopener\">Trang web OneProxy<\/a> \u0111\u1ec3 bi\u1ebft chi ti\u1ebft v\u1ec1 c\u00e1ch s\u1eed d\u1ee5ng UUID trong qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7 proxy.<\/li>\n<\/ul>","protected":false},"featured_media":479446,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479445","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Universally Unique Identifier (UUID)<\/mark>","faq_items":[{"question":"What is a Universally Unique Identifier (UUID)?","answer":"<p>A Universally Unique Identifier (UUID) is a 128-bit number used to uniquely identify information in computer systems. It is a standardized and globally unique identifier without the need for central coordination.<\/p>"},{"question":"How did UUIDs originate, and when were they first mentioned?","answer":"<p>UUIDs were first defined as part of the Apollo Network Computing System in the early 1980s. The first standardized specification was published in 1990 as part of the Open Software Foundation's (OSF) Distributed Computing Environment (DCE).<\/p>"},{"question":"How do UUIDs work, and what is their internal structure?","answer":"<p>UUIDs consist of five parts: a 32-bit time-low, 16-bit time-mid, 16-bit time-high-and-version, 8-bit clock-seq-and-reserved, 8-bit clock-seq-low, and 48-bit node. This structure ensures their uniqueness across space and time.<\/p>"},{"question":"What are the key features of UUIDs?","answer":"<p>The key features of UUIDs include:<\/p><ul><li>Uniqueness: UUIDs are globally unique across different systems and devices.<\/li><li>Standards-based: They are defined by the ISO\/IEC 9834-8:2014 international standard.<\/li><li>No Central Authority: UUIDs can be generated independently without requiring coordination from a central authority.<\/li><li>Versatility: They are used in various applications, including file systems, databases, and network protocols.<\/li><\/ul>"},{"question":"What are the different types of UUIDs?","answer":"<p>There are five versions of UUIDs, each serving different purposes:<\/p><ol><li>Version 1: Based on MAC address and timestamp.<\/li><li>Version 2: DCE Security, with POSIX UIDs.<\/li><li>Version 3: Based on MD5 hash and a namespace.<\/li><li>Version 4: Randomly generated.<\/li><li>Version 5: Based on SHA-1 hash and a namespace.<\/li><\/ol>"},{"question":"How are UUIDs used, and what are the associated problems and solutions?","answer":"<p>UUIDs are used in various applications, such as databases, file systems, and networking, to uniquely identify information. However, problems like collisions and potential performance issues may arise.<\/p><p>To address these issues, developers can use Version 4 UUIDs to reduce collision probabilities and optimize libraries for efficient UUID generation.<\/p>"},{"question":"How do UUIDs compare to GUIDs, and what makes them unique across systems?","answer":"<p>GUID (Globally Unique Identifier) is a Microsoft implementation of UUID, both being 128-bit values. UUIDs maintain their uniqueness across systems, unlike local IDs, making them suitable for cross-platform applications.<\/p>"},{"question":"What does the future hold for UUIDs, and how are they associated with proxy servers like OneProxy?","answer":"<p>In the future, UUIDs may see advancements to accommodate evolving cryptographic standards and enhance security and interoperability. Proxy servers like OneProxy can utilize UUIDs to uniquely identify user sessions and manage connections efficiently, ensuring privacy and security.<\/p><p>For more information and applications of UUIDs, please visit the provided related links.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479445","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479445\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/479446"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=479445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}