{"id":476656,"date":"2023-08-09T07:31:20","date_gmt":"2023-08-09T07:31:20","guid":{"rendered":""},"modified":"2023-09-05T11:13:11","modified_gmt":"2023-09-05T11:13:11","slug":"data-link-layer","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/cn\/wiki\/data-link-layer\/","title":{"rendered":"\u6570\u636e\u94fe\u8def\u5c42"},"content":{"rendered":"<p>\u6570\u636e\u94fe\u8def\u5c42\u662f\u5f00\u653e\u7cfb\u7edf\u4e92\u8fde\uff08OSI\uff09\u6a21\u578b\u4e2d\u7684\u7b2c\u4e8c\u5c42\u3002\u5b83\u5904\u7406\u7269\u7406\u7f51\u7edc\u4e0a\u6570\u636e\u5305\u7684\u53ef\u9760\u4f20\u8f93\uff0c\u7ba1\u7406\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63\uff0c\u5e76\u7ba1\u7406\u7f51\u7edc\u8bbf\u95ee\u3002<\/p>\n<h2>\u6570\u636e\u94fe\u8def\u5c42\u7684\u5386\u53f2\u80cc\u666f<\/h2>\n<p>\u6570\u636e\u94fe\u8def\u5c42\u7684\u6982\u5ff5\u53ef\u4ee5\u8ffd\u6eaf\u5230\u56fd\u9645\u6807\u51c6\u5316\u7ec4\u7ec7 (ISO) \u5728 20 \u4e16\u7eaa 70 \u5e74\u4ee3\u672b\u548c 80 \u5e74\u4ee3\u521d\u5f00\u53d1\u7684 OSI \u6a21\u578b\u3002\u8be5\u6a21\u578b\u65e8\u5728\u4e3a\u7f51\u7edc\u8bbe\u5907\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u5f00\u53d1\u548c\u4e92\u64cd\u4f5c\u6027\u521b\u5efa\u4e00\u4e2a\u5f00\u653e\u7684\u73af\u5883\u3002 OSI \u6a21\u578b\u5c06\u8ba1\u7b97\u673a\u5230\u8ba1\u7b97\u673a\u901a\u4fe1\u7684\u590d\u6742\u8fc7\u7a0b\u5206\u4e3a\u4e03\u4e2a\u53ef\u7ba1\u7406\u7684\u5c42\u3002\u6570\u636e\u94fe\u8def\u5c42\u662f\u7b2c\u4e8c\u5c42\uff0c\u65e8\u5728\u901a\u8fc7\u7269\u7406\u4ecb\u8d28\u5728\u8bbe\u5907\u4e4b\u95f4\u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<h2>\u6df1\u5165\u7814\u7a76\u6570\u636e\u94fe\u8def\u5c42<\/h2>\n<p>\u6570\u636e\u94fe\u8def\u5c42\u5728 OSI \u6a21\u578b\u4e2d\u63d0\u4f9b\u51e0\u4e2a\u5173\u952e\u529f\u80fd\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u5e27\u540c\u6b65<\/strong>\uff1a\u5b83\u5c06\u4ece\u7f51\u7edc\u5c42\u63a5\u6536\u5230\u7684\u6bd4\u7279\u6d41\u5212\u5206\u4e3a\u53ef\u7ba1\u7406\u7684\u6570\u636e\u5355\u5143\uff0c\u79f0\u4e3a\u5e27\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u7269\u7406\u5bfb\u5740<\/strong>\uff1a\u5982\u679c\u8981\u5c06\u5e27\u5206\u53d1\u5230\u7f51\u7edc\u4e0a\u7684\u4e0d\u540c\u7cfb\u7edf\uff0c\u6570\u636e\u94fe\u8def\u5c42\u4f1a\u5728\u5e27\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u6807\u5934\uff0c\u4ee5\u5b9a\u4e49\u76ee\u6807\u8ba1\u7b97\u673a\u7684\u7269\u7406\u5730\u5740\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u6d41\u91cf\u63a7\u5236<\/strong>\uff1a\u5982\u679c\u63a5\u6536\u65b9\u83b7\u53d6\u6570\u636e\u7684\u901f\u7387\u4f4e\u4e8e\u53d1\u9001\u65b9\u4ea7\u751f\u7684\u6570\u636e\u901f\u7387\uff0c\u5219\u6570\u636e\u94fe\u8def\u5c42\u4f1a\u65bd\u52a0\u6d41\u91cf\u63a7\u5236\u673a\u5236\uff0c\u4ee5\u907f\u514d\u4f7f\u63a5\u6536\u65b9\u4e0d\u582a\u91cd\u8d1f\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u9519\u8bef\u63a7\u5236<\/strong>\uff1a\u5b83\u901a\u8fc7\u6dfb\u52a0\u68c0\u6d4b\u548c\u91cd\u65b0\u4f20\u8f93\u635f\u574f\u6216\u4e22\u5931\u5e27\u7684\u673a\u5236\u6765\u589e\u52a0\u7269\u7406\u5c42\u7684\u53ef\u9760\u6027\u3002\u5b83\u8fd8\u53ef\u4ee5\u4f7f\u7528\u786e\u8ba4\u7cfb\u7edf\u9632\u6b62\u5e27\u91cd\u590d\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8bbf\u95ee\u63a7\u5236<\/strong>\uff1a\u5f53\u4e24\u4e2a\u6216\u591a\u4e2a\u8bbe\u5907\u8fde\u63a5\u5230\u540c\u4e00\u94fe\u8def\u65f6\uff0c\u9700\u8981\u6570\u636e\u94fe\u8def\u534f\u8bae\u6765\u786e\u5b9a\u5728\u4efb\u4f55\u7ed9\u5b9a\u65f6\u95f4\u54ea\u4e2a\u8bbe\u5907\u5bf9\u94fe\u8def\u5177\u6709\u63a7\u5236\u6743\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u6570\u636e\u94fe\u8def\u5c42\u7684\u5185\u90e8\u7ed3\u6784<\/h2>\n<p>\u6570\u636e\u94fe\u8def\u5c42\u5206\u4e3a\u4e24\u4e2a\u5b50\u5c42\u4ee5\u6709\u6548\u5730\u6267\u884c\u5176\u529f\u80fd\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u903b\u8f91\u94fe\u8def\u63a7\u5236 (LLC)<\/strong>\uff1a\u8be5\u4e0a\u5c42\u5b50\u5c42\u8d1f\u8d23\u5e27\u540c\u6b65\u3001\u6d41\u91cf\u63a7\u5236\u548c\u9519\u8bef\u68c0\u67e5\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5a92\u4f53\u8bbf\u95ee\u63a7\u5236 (MAC)<\/strong>\uff1a\u8f83\u4f4e\u7684\u5b50\u5c42 MAC \u8d1f\u8d23\u5904\u7406\u7f51\u7edc\u4e0a\u7684\u8bbe\u5907\u5982\u4f55\u83b7\u53d6\u6570\u636e\u8bbf\u95ee\u6743\u9650\u548c\u4f20\u8f93\u6570\u636e\u7684\u8bb8\u53ef\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u6570\u636e\u94fe\u8def\u5c42\u7684\u4e3b\u8981\u7279\u6027<\/h2>\n<ul>\n<li>\n<p><strong>\u53d6\u666f<\/strong>\uff1a\u6210\u5e27\u662f\u4ece\u7f51\u7edc\u5c42\u7684\u6570\u636e\u62a5\u6216\u6570\u636e\u5305\u521b\u5efa\u5e27\u7684\u8fc7\u7a0b\u3002\u8fd9\u4e9b\u5e27\u88ab\u53d1\u9001\u5230\u7269\u7406\u5c42\u8fdb\u884c\u8f6c\u53d1\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u7269\u7406\u5bfb\u5740<\/strong>\uff1a\u5b83\u4e3a\u7f51\u7edc\u4e0a\u7684\u6bcf\u4e2a\u8bbe\u5907\u63d0\u4f9b\u552f\u4e00\u7684\u6807\u8bc6\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u9519\u8bef\u548c\u6d41\u91cf\u63a7\u5236<\/strong>\uff1a\u5b83\u901a\u8fc7\u5e94\u7528\u9519\u8bef\u68c0\u6d4b\/\u7ea0\u6b63\u6280\u672f\u548c\u6d41\u91cf\u63a7\u5236\u6765\u786e\u4fdd\u53ef\u9760\u7684\u8fde\u63a5\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8bbf\u95ee\u63a7\u5236<\/strong>\uff1a\u5b9a\u4e49\u8bbe\u5907\u4f20\u8f93\u7684\u89c4\u5219\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u6570\u636e\u94fe\u8def\u5c42\u7684\u7c7b\u578b<\/h2>\n<p>\u6570\u636e\u94fe\u8def\u5c42\u534f\u8bae\u53ef\u4ee5\u6839\u636e\u5176\u8fd0\u884c\u7684\u7f51\u7edc\u7c7b\u578b\u8fdb\u884c\u5206\u7c7b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7f51\u7edc\u7c7b\u578b<\/th>\n<th>\u534f\u8bae<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5c40\u57df\u7f51 (LAN)<\/td>\n<td>\u4ee5\u592a\u7f51\u3001\u4ee4\u724c\u73af<\/td>\n<\/tr>\n<tr>\n<td>\u57ce\u57df\u7f51 (MAN)<\/td>\n<td>\u5206\u5e03\u5f0f\u961f\u5217\u53cc\u603b\u7ebf (DQDB)<\/td>\n<\/tr>\n<tr>\n<td>\u5e7f\u57df\u7f51 (WAN)<\/td>\n<td>\u70b9\u5bf9\u70b9\u534f\u8bae (PPP)\u3001\u9ad8\u7ea7\u6570\u636e\u94fe\u8def\u63a7\u5236 (HDLC)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u6570\u636e\u94fe\u8def\u5c42\u7684\u5229\u7528\u53ca\u76f8\u5173\u95ee\u9898\/\u89e3\u51b3\u65b9\u6848<\/h2>\n<p>\u6570\u636e\u94fe\u8def\u5c42\u6784\u6210\u7f51\u7edc\u6570\u636e\u4f20\u8f93\u7684\u9aa8\u5e72\u3002\u5b83\u6d89\u53ca\u591a\u79cd\u5e94\u7528\uff0c\u4f8b\u5982 LAN \u548c WAN \u7f51\u7edc\u3001\u7f51\u7edc\u8bbe\u5907\u8bc6\u522b\u4ee5\u53ca\u5efa\u7acb\u53ef\u9760\u7684\u901a\u4fe1\u901a\u9053\u3002\u7136\u800c\uff0c\u5b83\u4e5f\u9047\u5230\u4e86\u51b2\u7a81\u3001\u6570\u636e\u635f\u574f\u548c\u62e5\u585e\u7b49\u95ee\u9898\u3002\u8fd9\u4e9b\u95ee\u9898\u5206\u522b\u901a\u8fc7\u51b2\u7a81\u68c0\u6d4b\u7b97\u6cd5\u3001\u9519\u8bef\u68c0\u6d4b\u548c\u7ea0\u6b63\u4ee3\u7801\u4ee5\u53ca\u6d41\u91cf\u63a7\u5236\u673a\u5236\u6765\u89e3\u51b3\u3002<\/p>\n<h2>\u6570\u636e\u94fe\u8def\u5c42\u5bf9\u6bd4\u5206\u6790<\/h2>\n<p>\u4e0b\u8868\u4e3a\u6570\u636e\u94fe\u8def\u5c42\u4e0e\u76f8\u90bb\u5c42\u7684\u6bd4\u8f83\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>OSI\u5c42<\/th>\n<th>\u529f\u80fd<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u7269\u7406\u5c42<\/strong><\/td>\n<td>\u901a\u8fc7\u7269\u7406\u4ecb\u8d28\u4f20\u8f93\u539f\u59cb\u6bd4\u7279\u6d41<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6570\u636e\u94fe\u8def\u5c42<\/strong><\/td>\n<td>\u6784\u5efa\u6570\u636e\u5305\u3001\u6267\u884c\u9519\u8bef\u63a7\u5236\u5e76\u7ba1\u7406\u5bf9\u7269\u7406\u4ecb\u8d28\u7684\u8bbf\u95ee<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7f51\u7edc\u5c42<\/strong><\/td>\n<td>\u5904\u7406\u8def\u7531\u548c\u6570\u636e\u5305\u8f6c\u53d1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u672a\u6765\u524d\u666f\u548c\u6280\u672f<\/h2>\n<p>\u968f\u7740\u7f51\u7edc\u6280\u672f\u7684\u53d1\u5c55\uff0c\u6570\u636e\u94fe\u8def\u5c42\u5c06\u7ee7\u7eed\u9002\u5e94\u548c\u96c6\u6210\u65b0\u6280\u672f\uff0c\u4ee5\u5b9e\u73b0\u66f4\u597d\u7684\u6570\u636e\u4f20\u8f93\u3002\u91cf\u5b50\u7f51\u7edc\u548c 5G \u6216 6G \u7f51\u7edc\u7b49\u6280\u672f\u5c06\u9700\u8981\u6570\u636e\u94fe\u8def\u5c42\u534f\u8bae\u6765\u5904\u7406\u66f4\u9ad8\u7684\u6570\u636e\u901f\u7387\u3001\u66f4\u4f4e\u7684\u5ef6\u8fdf\u548c\u66f4\u5927\u7684\u7f51\u7edc\u5bb9\u91cf\u3002<\/p>\n<h2>\u4ee3\u7406\u670d\u52a1\u5668\u548c\u6570\u636e\u94fe\u8def\u5c42<\/h2>\n<p>\u4ee3\u7406\u670d\u52a1\u5668\u5145\u5f53\u5ba2\u6237\u7aef\u4ece\u5176\u4ed6\u670d\u52a1\u5668\u5bfb\u6c42\u8d44\u6e90\u7684\u8bf7\u6c42\u7684\u4e2d\u4ecb\uff0c\u5728 OSI \u6a21\u578b\u7684\u5e94\u7528\u7a0b\u5e8f\u5c42\u8fd0\u884c\u3002\u7136\u800c\uff0c\u6570\u636e\u94fe\u8def\u5c42\u4ecd\u7136\u53d1\u6325\u7740\u4f5c\u7528\uff0c\u56e0\u4e3a\u6570\u636e\u5fc5\u987b\u901a\u8fc7\u8be5\u5c42\u624d\u80fd\u5230\u8fbe\u76ee\u7684\u5730\u3002\u4ee3\u7406\u670d\u52a1\u5668\u53ef\u4ee5\u5229\u7528\u6570\u636e\u94fe\u8def\u5c42\u7684\u9519\u8bef\u548c\u6d41\u91cf\u63a7\u5236\u673a\u5236\u6765\u4fdd\u8bc1\u6570\u636e\u7684\u53ef\u9760\u4f20\u8f93\u3002<\/p>\n<h2>\u76f8\u5173\u94fe\u63a5<\/h2>\n<ol>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/solutions\/collateral\/enterprise\/design-zone-smart-business-architecture\/sbaENP_whitepaper.html\" target=\"_new\" rel=\"noopener nofollow\">\u601d\u79d1\u2014\u2014\u6570\u636e\u94fe\u8def\u5c42<\/a><\/li>\n<li><a href=\"https:\/\/www.ibm.com\/docs\/en\/zos\/2.3.0?topic=layers-data-link-layer\" target=\"_new\" rel=\"noopener nofollow\">IBM \u77e5\u8bc6\u4e2d\u5fc3 \u2013 \u6570\u636e\u94fe\u8def\u5c42<\/a><\/li>\n<li><a href=\"https:\/\/www.csunplugged.org\/en\/topics\/computer-science-basics\/csunplugged\/whole-class-guided\/guide\/data-link-layer\/\" target=\"_new\" rel=\"noopener nofollow\">\u91ca\u653e\u8ba1\u7b97\u673a\u79d1\u5b66\u2014\u2014\u6570\u636e\u94fe\u8def\u5c42<\/a><\/li>\n<li><a href=\"https:\/\/docs.microsoft.com\/en-us\/previous-versions\/windows\/it-pro\/windows-2000-server\/cc977218(v=technet.10)\" target=\"_new\" rel=\"noopener nofollow\">\u5fae\u8f6f\u2014\u2014\u6570\u636e\u94fe\u8def\u5c42<\/a><\/li>\n<\/ol>","protected":false},"featured_media":476657,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476656","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Data Link Layer: An In-Depth Examination<\/mark>","faq_items":[{"question":"What is the Data Link Layer?","answer":"<p>The Data Link Layer is the second layer in the Open Systems Interconnection (OSI) model. It is responsible for the reliable transportation of data packets across physical networks, handling error detection and correction, and governing network access.<\/p>"},{"question":"What are the primary functions of the Data Link Layer?","answer":"<p>The primary functions of the Data Link Layer include frame synchronization, physical addressing, flow control, error control, and access control.<\/p>"},{"question":"How does the Data Link Layer ensure reliable data transmission?","answer":"<p>The Data Link Layer ensures reliable data transmission by implementing error detection and correction techniques. If any error is detected, the layer triggers a retransmission of the corrupted data.<\/p>"},{"question":"What are the sublayers of the Data Link Layer?","answer":"<p>The Data Link Layer is divided into two sublayers - the Logical Link Control (LLC) that handles frame synchronization, flow control, and error checking, and the Media Access Control (MAC) that manages how a device on the network gains access to the data and permission to transmit it.<\/p>"},{"question":"What types of Data Link Layer protocols exist?","answer":"<p>Data Link Layer protocols vary based on the type of network. For instance, Ethernet and Token Ring are used in Local Area Networks (LAN), Distributed Queue Dual Bus (DQDB) in Metropolitan Area Networks (MAN), and Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC) in Wide Area Networks (WAN).<\/p>"},{"question":"How does the Data Link Layer interact with proxy servers?","answer":"<p>While proxy servers operate at the application layer of the OSI model, the Data Link Layer still plays a role in ensuring the data travels correctly from the source to the destination. This is done using the layer's error and flow control mechanisms.<\/p>"},{"question":"How will future technologies impact the Data Link Layer?","answer":"<p>As technology evolves and new concepts like quantum networking and advanced generation networks (5G, 6G) are introduced, the Data Link Layer will adapt to integrate new techniques for efficient data transmission, handle higher data rates, lower latency, and increased network capacities.<\/p>"},{"question":"What are some related resources for more information about the Data Link Layer?","answer":"<p>You can refer to resources like Cisco - Data Link Layer, IBM Knowledge Center - Data Link Layer, Computer Science Unleashed - Data Link Layer, and Microsoft - Data Link Layer for additional information.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476656\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media\/476657"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media?parent=476656"}],"curies":[{"name":"\u53ef\u6e7f\u6027\u7c89\u5242","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}