{"id":476239,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:18","modified_gmt":"2023-09-05T11:12:18","slug":"class-b-ip-address","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/class-b-ip-address\/","title":{"rendered":"\u0110\u1ecba ch\u1ec9 IP lo\u1ea1i B"},"content":{"rendered":"<p>\u0110\u1ecba ch\u1ec9 IP lo\u1ea1i B l\u00e0 m\u1ed9t lo\u1ea1i \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi Giao th\u1ee9c Internet (IP), \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ed9 quy t\u1eafc quy \u0111\u1ecbnh c\u00e1ch g\u1eedi v\u00e0 nh\u1eadn d\u1eef li\u1ec7u qua internet.<\/p>\n<h2>L\u1ecbch s\u1eed v\u00e0 ngu\u1ed3n g\u1ed1c<\/h2>\n<p>Kh\u00e1i ni\u1ec7m \u0111\u1ecba ch\u1ec9 IP lo\u1ea1i B b\u1eaft ngu\u1ed3n t\u1eeb h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i \u0111\u1ecba ch\u1ec9 IP ban \u0111\u1ea7u \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ea1ng ph\u00e2n lo\u1ea1i. H\u1ec7 th\u1ed1ng n\u00e0y \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a Internet v\u00e0o kho\u1ea3ng nh\u1eefng n\u0103m 1980 v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a IPv4 (Giao th\u1ee9c Internet phi\u00ean b\u1ea3n 4) nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n qu\u1ea3n l\u00fd vi\u1ec7c ph\u00e2n b\u1ed5 v\u00e0 ph\u00e2n b\u1ed5 \u0111\u1ecba ch\u1ec9 IP.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft<\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IP lo\u1ea1i B l\u00e0 m\u1ed9t trong n\u0103m lo\u1ea1i \u0111\u1ecba ch\u1ec9 IP (Lo\u1ea1i A, B, C, D v\u00e0 E) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a Internet. Trong m\u1ea1ng ph\u00e2n l\u1edbp, m\u1ed7i l\u1edbp s\u1eed d\u1ee5ng m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 v\u00e0 \u0111\u1ecba ch\u1ec9 m\u1ea1ng ri\u00eang bi\u1ec7t, v\u1edbi c\u00e1c \u0111\u1ecba ch\u1ec9 IP L\u1edbp B n\u1eb1m gi\u1eefa L\u1edbp A v\u00e0 L\u1edbp C v\u1ec1 quy m\u00f4 v\u00e0 quy m\u00f4.<\/p>\n<p>M\u1ed7i m\u1ea1ng Lo\u1ea1i B bao g\u1ed3m ti\u1ec1n t\u1ed1 m\u1ea1ng 16 bit, theo sau l\u00e0 s\u1ed1 m\u00e1y ch\u1ee7 16 bit. D\u1ea3i \u0111\u1ecba ch\u1ec9 IP cho L\u1edbp B l\u00e0 t\u1eeb 128.0.0.0 \u0111\u1ebfn 191.255.255.255. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ea1ng Lo\u1ea1i B c\u00f3 th\u1ec3 c\u00f3 t\u1edbi 65.534 m\u00e1y ch\u1ee7 (2^16 tr\u1eeb 2 cho \u0111\u1ecba ch\u1ec9 m\u1ea1ng v\u00e0 \u0111\u1ecba ch\u1ec9 qu\u1ea3ng b\u00e1).<\/p>\n<h2>C\u1ea5u tr\u00fac v\u00e0 ch\u1ee9c n\u0103ng b\u00ean trong<\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IP l\u1edbp B c\u00f3 ph\u1ea7n m\u1ea1ng hai octet v\u00e0 ph\u1ea7n m\u00e1y ch\u1ee7 hai octet. Trong thu\u1eadt ng\u1eef nh\u1ecb ph\u00e2n, hai octet \u0111\u1ea7u ti\u00ean l\u00e0 \u0111\u1ecba ch\u1ec9 m\u1ea1ng v\u00e0 hai octet cu\u1ed1i c\u00f9ng l\u00e0 \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7. V\u00ed d\u1ee5: trong \u0111\u1ecba ch\u1ec9 IP 150.150.1.1, \u201c150.150\u201d l\u00e0 \u0111\u1ecba ch\u1ec9 m\u1ea1ng v\u00e0 \u201c1.1\u201d l\u00e0 \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7.<\/p>\n<p>Hai bit \u0111\u1ea7u ti\u00ean c\u1ee7a octet \u0111\u1ea7u ti\u00ean trong \u0111\u1ecba ch\u1ec9 L\u1edbp B lu\u00f4n l\u00e0 10. \u0110i\u1ec1u n\u00e0y \u0111\u1ec3 l\u1ea1i 14 bit cho \u0111\u1ecba ch\u1ec9 m\u1ea1ng, cung c\u1ea5p t\u1ed5ng c\u1ed9ng 16.384 (2^14) \u0111\u1ecba ch\u1ec9 m\u1ea1ng c\u00f3 th\u1ec3 c\u00f3.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh<\/h2>\n<p>M\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a \u0111\u1ecba ch\u1ec9 IP lo\u1ea1i B bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p>M\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7: M\u1ea1ng lo\u1ea1i B c\u00f3 th\u1ec3 ch\u1ee9a m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7, khi\u1ebfn ch\u00fang tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 quy m\u00f4 v\u1eeba v\u00e0 l\u1edbn.<\/p>\n<\/li>\n<li>\n<p>\u0110\u1ecba ch\u1ec9 lo\u1ea1i B l\u00e0 duy nh\u1ea5t tr\u00ean to\u00e0n c\u1ea7u: M\u1ed7i \u0111\u1ecba ch\u1ec9 IP lo\u1ea1i B l\u00e0 duy nh\u1ea5t tr\u00ean to\u00e0n b\u1ed9 internet, \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 xung \u0111\u1ed9t ho\u1eb7c ch\u1ed3ng ch\u00e9o.<\/p>\n<\/li>\n<li>\n<p>M\u00e3 \u0111\u1ecbnh danh nh\u1ecb ph\u00e2n: C\u00e1c bit ban \u0111\u1ea7u c\u1ee7a \u0111\u1ecba ch\u1ec9 L\u1edbp B \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh 10, ph\u00e2n bi\u1ec7t ch\u00fang v\u1edbi c\u00e1c l\u1edbp kh\u00e1c.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i \u0111\u1ecba ch\u1ec9 IP lo\u1ea1i B<\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IP lo\u1ea1i B c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang:<\/p>\n<ol>\n<li>\n<p><strong>\u0110\u1ecba ch\u1ec9 IP c\u00f4ng c\u1ed9ng lo\u1ea1i B:<\/strong> \u0110\u00e2y l\u00e0 nh\u1eefng \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t tr\u00ean to\u00e0n c\u1ea7u v\u00e0 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh b\u1edfi C\u01a1 quan c\u1ea5p s\u1ed1 hi\u1ec7u Internet (IANA) v\u00e0 C\u01a1 quan \u0111\u0103ng k\u00fd Internet khu v\u1ef1c (RIR). Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean l\u1ea1c qua internet.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110\u1ecba ch\u1ec9 IP ri\u00eang lo\u1ea1i B:<\/strong> Ch\u00fang \u0111\u01b0\u1ee3c d\u00e0nh ri\u00eang cho c\u00e1c m\u1ea1ng ri\u00eang v\u00e0 kh\u00f4ng th\u1ec3 \u0111\u1ecbnh tuy\u1ebfn tr\u00ean internet. Ph\u1ea1m vi d\u00e0nh ri\u00eang cho c\u00e1c \u0111\u1ecba ch\u1ec9 IP Lo\u1ea1i B ri\u00eang t\u01b0 l\u00e0 t\u1eeb 172.16.0.0 \u0111\u1ebfn 172.31.255.255.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan<\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IP lo\u1ea1i B th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 quy m\u00f4 v\u1eeba v\u00e0 l\u1edbn y\u00eau c\u1ea7u s\u1ed1 l\u01b0\u1ee3ng l\u1edbn \u0111\u1ecba ch\u1ec9 IP cho c\u00e1c thi\u1ebft b\u1ecb n\u1ed1i m\u1ea1ng c\u1ee7a h\u1ecd. Tuy nhi\u00ean, h\u1ec7 th\u1ed1ng m\u1ea1ng ph\u00e2n lo\u1ea1i, bao g\u1ed3m c\u00e1c \u0111\u1ecba ch\u1ec9 L\u1edbp B, ph\u1ea7n l\u1edbn \u0111\u00e3 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng \u0110\u1ecbnh tuy\u1ebfn gi\u1eefa c\u00e1c mi\u1ec1n kh\u00f4ng ph\u00e2n lo\u1ea1i (CIDR) do v\u1ea5n \u0111\u1ec1 c\u1ea1n ki\u1ec7t \u0111\u1ecba ch\u1ec9 IP. CIDR cho ph\u00e9p ph\u00e2n b\u1ed5 \u0111\u1ecba ch\u1ec9 IP hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<h2>So s\u00e1nh v\u1edbi c\u00e1c \u0111i\u1ec1u kho\u1ea3n t\u01b0\u01a1ng t\u1ef1<\/h2>\n<table>\n<thead>\n<tr>\n<th>M\u1ee5c<\/th>\n<th>L\u1edbp A<\/th>\n<th>L\u1edbp B<\/th>\n<th>L\u1edbp C<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ph\u1ea1m vi Octet \u0111\u1ea7u ti\u00ean<\/td>\n<td>1-126<\/td>\n<td>128-191<\/td>\n<td>192-223<\/td>\n<\/tr>\n<tr>\n<td>Bit m\u1ea1ng<\/td>\n<td>8<\/td>\n<td>16<\/td>\n<td>24<\/td>\n<\/tr>\n<tr>\n<td>Bit ch\u1ee7<\/td>\n<td>24<\/td>\n<td>16<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>S\u1ed1 l\u01b0\u1ee3ng m\u1ea1ng<\/td>\n<td>126<\/td>\n<td>16,384<\/td>\n<td>2,097,152<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y ch\u1ee7 tr\u00ean m\u1ed7i m\u1ea1ng<\/td>\n<td>16,777,214<\/td>\n<td>65,534<\/td>\n<td>254<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai<\/h2>\n<p>S\u1ef1 ra \u0111\u1eddi c\u1ee7a IPv6, cung c\u1ea5p kh\u00f4ng gian \u0111\u1ecba ch\u1ec9 l\u1edbn h\u01a1n \u0111\u00e1ng k\u1ec3, \u0111\u00e3 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 c\u1ea1n ki\u1ec7t \u0111\u1ecba ch\u1ec9 IPv4. M\u1eb7c d\u00f9 v\u1eady, nhi\u1ec1u t\u1ed5 ch\u1ee9c v\u1eabn ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng IPv4, bao g\u1ed3m c\u1ea3 \u0111\u1ecba ch\u1ec9 Lo\u1ea1i B, do chi ph\u00ed v\u00e0 s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i sang IPv6.<\/p>\n<h2>Li\u00ean k\u1ebft v\u1edbi m\u00e1y ch\u1ee7 proxy<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi \u0111\u1ecba ch\u1ec9 IP Lo\u1ea1i B theo nhi\u1ec1u c\u00e1ch. H\u1ecd c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP lo\u1ea1i B \u0111\u1ec3 chuy\u1ec3n ti\u1ebfp y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i gi\u1eefa m\u00e1y ch\u1ee7 v\u00e0 m\u00e1y kh\u00e1ch. Ngo\u00e0i ra, vi\u1ec7c s\u1eed d\u1ee5ng nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP Lo\u1ea1i B c\u00f3 th\u1ec3 gi\u00fap m\u00e1y ch\u1ee7 proxy ph\u00e2n ph\u1ed1i t\u1ea3i, t\u0103ng t\u00ednh d\u1ef1 ph\u00f2ng v\u00e0 c\u1ea3i thi\u1ec7n t\u00ednh \u1ea9n danh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.iana.org\/\" target=\"_new\" rel=\"noopener nofollow\">C\u01a1 quan qu\u1ea3n l\u00fd s\u1ed1 \u0111\u01b0\u1ee3c g\u00e1n Internet (IANA)<\/a><\/li>\n<li><a href=\"https:\/\/www.nro.net\/\" target=\"_new\" rel=\"noopener nofollow\">C\u01a1 quan \u0111\u0103ng k\u00fd Internet khu v\u1ef1c (RIR)<\/a><\/li>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/ip\/routing-information-protocol-rip\/13788-3.html\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1edbi thi\u1ec7u v\u1ec1 \u0110\u1ecba ch\u1ec9 IP v\u00e0 M\u1ea1ng<\/a><\/li>\n<li><a href=\"https:\/\/web.mit.edu\/rhel-doc\/4\/RH-DOCS\/rhel-sg-en-4\/ch-ipaddress.html\" target=\"_new\" rel=\"noopener nofollow\">Hi\u1ec3u \u0111\u1ecba ch\u1ec9 IP<\/a><\/li>\n<\/ul>","protected":false},"featured_media":476240,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476239","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Understanding Class B IP Address<\/mark>","faq_items":[{"question":"What is a Class B IP address?","answer":"<p>A Class B IP address is a type of IP address defined by the Internet Protocol. It has a 16-bit network prefix and a 16-bit host number, with an IP address range from 128.0.0.0 to 191.255.255.255.<\/p>"},{"question":"Where did Class B IP addresses originate?","answer":"<p>Class B IP addresses originated from the classful networking system introduced in the early days of the internet around the 1980<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476239","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\/476239\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476240"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}