{"id":4256,"date":"2025-09-11T00:00:00","date_gmt":"2025-09-11T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/vpn-virtual-private-network-explained\/"},"modified":"2026-06-10T02:07:22","modified_gmt":"2026-06-10T02:07:22","slug":"vpn-virtual-private-network-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/vpn-virtual-private-network-explained","title":{"rendered":"M\u1ea1ng Ri\u00eang \u1ea2o (VPN) L\u00e0 G\u00ec?"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fb301c2a06b6406181034df939732bc6.webp\" alt=\"What Is a Virtual Private Network (VPN)?\" class=\"wp-image-4253\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fb301c2a06b6406181034df939732bc6.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fb301c2a06b6406181034df939732bc6-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fb301c2a06b6406181034df939732bc6-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fb301c2a06b6406181034df939732bc6-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fb301c2a06b6406181034df939732bc6-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25b7 VPN L\u00e0 G\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>M\u1ea1ng Ri\u00eang \u1ea2o (VPN)<\/strong> l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 t\u1ea1o ra k\u1ebft n\u1ed1i an to\u00e0n v\u00e0 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a qua m\u1ea1ng c\u00f4ng c\u1ed9ng nh\u01b0 Internet. B\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp m\u1ed9t \u201c\u0111\u01b0\u1eddng h\u1ea7m\u201d gi\u1eefa thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 t\u1eeb xa, VPN b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m, \u0111\u1ea3m b\u1ea3o quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean tr\u1ef1c tuy\u1ebfn nh\u01b0 th\u1ec3 h\u1ecd \u0111ang k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t m\u1ea1ng ri\u00eang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c VPN \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i c\u1ea3 b\u1edfi c\u00e1 nh\u00e2n l\u1eabn doanh nghi\u1ec7p nh\u1eb1m b\u1ea3o v\u1ec7 c\u00e1c giao ti\u1ebfp k\u1ef9 thu\u1eadt s\u1ed1, \u0111\u1eb7c bi\u1ec7t khi l\u00e0m vi\u1ec7c t\u1eeb xa ho\u1eb7c truy\u1ec1n d\u1eef li\u1ec7u qua c\u00e1c m\u1ea1ng kh\u00f4ng \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25b7 C\u00e1ch Ho\u1ea1t \u0110\u1ed9ng C\u1ee7a VPN<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">VPN ho\u1ea1t \u0111\u1ed9ng th\u00f4ng qua m\u1ed9t qu\u00e1 tr\u00ecnh g\u1ecdi l\u00e0 <strong>\u0111\u01b0\u1eddng h\u1ea7m h\u00f3a (tunneling)<\/strong>. Khi k\u1ebft n\u1ed1i VPN \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, c\u00e1c g\u00f3i d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c bao b\u1ecdc v\u00e0 m\u00e3 h\u00f3a tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c truy\u1ec1n qua m\u1ea1ng. Qu\u00e1 tr\u00ecnh n\u00e0y khi\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi c\u00e1c b\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n nh\u01b0 tin t\u1eb7c ho\u1eb7c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c giao th\u1ee9c VPN ch\u00ednh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>PPTP (Giao th\u1ee9c \u0110\u01b0\u1eddng h\u1ea7m \u0110i\u1ec3m-\u0111i\u1ec3m):<\/strong> M\u1ed9t trong nh\u1eefng giao th\u1ee9c VPN \u0111\u1ea7u ti\u00ean, cung c\u1ea5p t\u1ed1c \u0111\u1ed9 nhanh nh\u01b0ng m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt y\u1ebfu h\u01a1n.<\/p><\/li><li><p><strong>L2TP\/IPsec (Giao th\u1ee9c \u0110\u01b0\u1eddng h\u1ea7m L\u1edbp 2 v\u1edbi IPsec):<\/strong> Cung c\u1ea5p m\u00e3 h\u00f3a m\u1ea1nh h\u01a1n b\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p \u0111\u01b0\u1eddng h\u1ea7m h\u00f3a v\u00e0 b\u1ea3o m\u1eadt IP.<\/p><\/li><li><p><strong>OpenVPN:<\/strong> M\u1ed9t giao th\u1ee9c m\u00e3 ngu\u1ed3n m\u1edf n\u1ed5i ti\u1ebfng nh\u1edd t\u00ednh linh ho\u1ea1t v\u00e0 b\u1ea3o m\u1eadt cao.<\/p><\/li><li><p><strong>IKEv2\/IPsec:<\/strong> Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho thi\u1ebft b\u1ecb di \u0111\u1ed9ng do kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh cao khi chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c m\u1ea1ng.<\/p><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"494\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fd68425af79243d59ceb5890eba55b21.webp\" alt=\"How VPNs Work\" class=\"wp-image-4254\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fd68425af79243d59ceb5890eba55b21.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fd68425af79243d59ceb5890eba55b21-300x124.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fd68425af79243d59ceb5890eba55b21-1024x422.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fd68425af79243d59ceb5890eba55b21-768x316.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fd68425af79243d59ceb5890eba55b21-18x7.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25b7 L\u1ee3i \u00cdch Khi S\u1eed D\u1ee5ng VPN<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49<br> <strong>B\u1ea3o M\u1eadt D\u1eef Li\u1ec7u:<\/strong> B\u1ea3o v\u1ec7 th\u00f4ng tin b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, gi\u1ea3m thi\u1ec3u r\u1ee7i ro b\u1ecb ch\u1eb7n b\u1eaft d\u1eef li\u1ec7u.<br\/>\ud83d\udc49<br> <strong>B\u1ea3o V\u1ec7 Quy\u1ec1n Ri\u00eang T\u01b0:<\/strong> \u1ea8n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, khi\u1ebfn ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn kh\u00f3 b\u1ecb theo d\u00f5i h\u01a1n.<br\/>\ud83d\udc49<br> <strong>Truy C\u1eadp T\u1eeb Xa:<\/strong> Cho ph\u00e9p nh\u00e2n vi\u00ean k\u1ebft n\u1ed1i an to\u00e0n v\u1edbi m\u1ea1ng n\u1ed9i b\u1ed9 c\u1ee7a doanh nghi\u1ec7p t\u1eeb b\u1ea5t k\u1ef3 \u0111\u00e2u.<br\/>\ud83d\udc49<br> <strong>V\u01b0\u1ee3t Qua H\u1ea1n Ch\u1ebf:<\/strong> Cho ph\u00e9p truy c\u1eadp v\u00e0o c\u00e1c t\u00e0i nguy\u00ean ho\u1eb7c trang web c\u00f3 th\u1ec3 b\u1ecb ch\u1eb7n \u1edf m\u1ed9t s\u1ed1 khu v\u1ef1c nh\u1ea5t \u0111\u1ecbnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25b7 \u1ee8ng D\u1ee5ng C\u1ee7a VPN Trong Kinh Doanh V\u00e0 \u0110\u1eddi S\u1ed1ng H\u00e0ng Ng\u00e0y<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Doanh Nghi\u1ec7p:<\/strong> K\u1ebft n\u1ed1i an to\u00e0n c\u00e1c nh\u00e2n vi\u00ean l\u00e0m vi\u1ec7c t\u1eeb xa v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u1ed9i b\u1ed9.<\/p><\/li><li><p><strong>C\u00e1 Nh\u00e2n:<\/strong> B\u1ea3o v\u1ec7 c\u00e1c giao d\u1ecbch tr\u1ef1c tuy\u1ebfn, ph\u00e1t tr\u1ef1c tuy\u1ebfn v\u00e0 duy\u1ec7t web tr\u00ean Wi-Fi c\u00f4ng c\u1ed9ng.<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-an-isp-internet-service-provider\/\"><strong>Nh\u00e0 Cung C\u1ea5p D\u1ecbch V\u1ee5<\/strong><\/a><strong>:<\/strong> \u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a kh\u00e1ch h\u00e0ng.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25b7 So S\u00e1nh VPN V\u1edbi C\u00e1c C\u00f4ng Ngh\u1ec7 M\u1ea1ng Kh\u00e1c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong khi VPN t\u1eadp trung v\u00e0o b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 tr\u00ean Internet c\u00f4ng c\u1ed9ng, th\u00ec c\u00e1c c\u00f4ng ngh\u1ec7 kh\u00e1c nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-mpls-multiprotocol-label-switching\/\"><strong>MPLS<\/strong><\/a> or <strong>\u0111\u01b0\u1eddng thu\u00ea ri\u00eang (dedicated leased lines)<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t cao v\u00e0 \u0111\u1ed9 tr\u1ec5 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c trong m\u1ea1ng doanh nghi\u1ec7p. Nhi\u1ec1u doanh nghi\u1ec7p tri\u1ec3n khai VPN song song v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y nh\u1eb1m c\u00e2n b\u1eb1ng chi ph\u00ed, t\u00ednh linh ho\u1ea1t v\u00e0 b\u1ea3o m\u1eadt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25b7 K\u1ebft Lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>M\u1ea1ng Ri\u00eang \u1ea2o (VPN)<\/strong> l\u00e0 n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i c\u1ee7a an ninh m\u1ea1ng v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh hi\u1ec7n \u0111\u1ea1i, \u0111\u1ea3m b\u1ea3o quy\u1ec1n ri\u00eang t\u01b0, truy c\u1eadp t\u1eeb xa an to\u00e0n v\u00e0 b\u1ea3o v\u1ec7 tr\u01b0\u1edbc c\u00e1c m\u1ed1i \u0111e d\u1ecda m\u1ea1ng. Khi c\u00e1c doanh nghi\u1ec7p ng\u00e0y c\u00e0ng \u00e1p d\u1ee5ng m\u00f4 h\u00ecnh l\u00e0m vi\u1ec7c lai (hybrid) v\u00e0 l\u00e0m vi\u1ec7c t\u1eeb xa, VPN v\u1eabn gi\u1eef vai tr\u00f2 thi\u1ebft y\u1ebfu trong vi\u1ec7c b\u1ea3o v\u1ec7 th\u00f4ng tin nh\u1ea1y c\u1ea3m v\u00e0 duy tr\u00ec c\u00e1c giao ti\u1ebfp k\u1ef9 thu\u1eadt s\u1ed1 an to\u00e0n.<\/p>","protected":false},"excerpt":{"rendered":"<p>M\u1ea1ng ri\u00eang \u1ea3o (VPN) b\u1ea3o m\u1eadt giao ti\u1ebfp tr\u1ef1c tuy\u1ebfn b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a d\u1eef li\u1ec7u v\u00e0 che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP. T\u00ecm hi\u1ec3u c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a VPN, c\u00e1c l\u1ee3i \u00edch m\u00e0 n\u00f3 mang l\u1ea1i, v\u00e0 l\u00fd do v\u00ec sao c\u00e1c doanh nghi\u1ec7p ph\u1ee5 thu\u1ed9c v\u00e0o VPN \u0111\u1ec3 truy c\u1eadp t\u1eeb xa an to\u00e0n v\u00e0 duy\u1ec7t web ri\u00eang t\u01b0.<\/p>","protected":false},"author":1,"featured_media":4255,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[],"class_list":["post-4256","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=4256"}],"version-history":[{"count":3,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4256\/revisions"}],"predecessor-version":[{"id":9470,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4256\/revisions\/9470"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4255"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}