{"id":3871,"date":"2025-07-07T11:19:58","date_gmt":"2025-07-07T03:19:58","guid":{"rendered":"https:\/\/www.key-iot.com\/?p=3871"},"modified":"2025-07-07T11:20:51","modified_gmt":"2025-07-07T03:20:51","slug":"why-segment-networks-even-when-ip-addresses-are-sufficient","status":"publish","type":"post","link":"https:\/\/www.key-iot.com\/zh_tw\/blog\/why-segment-networks-even-when-ip-addresses-are-sufficient\/","title":{"rendered":"\u5373\u4f7f IP \u4f4d\u5740\u5df2\u7d93\u8db3\u5920\uff0c\u70ba\u4f55\u4ecd\u8981\u5206\u5272\u7db2\u8def\uff1f"},"content":{"rendered":"<div translate=\"no\"><\/div>\n<div translate=\"no\"><img decoding=\"async\" class=\"size-full wp-image-3873 aligncenter\" title=\"764c815afd4b0b19b91be26fac2d4822\" src=\"https:\/\/www.key-iot.com\/wp-content\/uploads\/2025\/07\/764c815afd4b0b19b91be26fac2d4822.png\" alt=\"764c815afd4b0b19b91be26fac2d4822\" width=\"859\" height=\"574\" srcset=\"https:\/\/www.key-iot.com\/wp-content\/uploads\/2025\/07\/764c815afd4b0b19b91be26fac2d4822.png 859w, https:\/\/www.key-iot.com\/wp-content\/uploads\/2025\/07\/764c815afd4b0b19b91be26fac2d4822-300x200.png 300w, https:\/\/www.key-iot.com\/wp-content\/uploads\/2025\/07\/764c815afd4b0b19b91be26fac2d4822-768x513.png 768w, https:\/\/www.key-iot.com\/wp-content\/uploads\/2025\/07\/764c815afd4b0b19b91be26fac2d4822-600x401.png 600w\" sizes=\"(max-width: 859px) 100vw, 859px\" \/><\/div>\n<div translate=\"no\"><\/div>\n<div translate=\"no\">\u8a31\u591a\u5b78\u7fd2\u7db2\u8def\u7684\u4eba\u5230\u4e86 IP \u4f4d\u5740\u4e3b\u984c\u6642\uff0c\u5e38\u6703\u6709\u9019\u6a23\u7684\u7591\u554f\uff1a<\/div>\n<div translate=\"no\">\u201c\u6211\u7684\u516c\u53f8\u53ea\u6709\u5e7e\u5341\u53f0\u8a2d\u5099\uff0c\u4e00\u500b\u7db2\u6bb5\u5c31\u8db3\u4ee5\u5bb9\u7d0d\u6211\u5011\u6240\u6709\u7684 IP \u4f4d\u5740\u3002\u70ba\u4ec0\u9ebc\u8981\u5206\u9019\u9ebc\u591a\u500b\u5b50\u7db2\uff1f\u201d<\/div>\n<div translate=\"no\">\u5225\u7b11\uff0c\u9019\u4e0d\u53ea\u662f\u521d\u5b78\u8005\u7684\u554f\u984c\u3002\u8a31\u591a\u64c1\u6709\u591a\u5e74\u7d93\u9a57\u7684\u7db2\u8def\u5de5\u7a0b\u5e2b\u90fd\u6703\u6389\u9032\u9019\u500b\u9677\u9631\uff1a\u64c1\u6709\u8db3\u5920\u7684 IP \u4f4d\u5740\u2260\u9069\u7576\u7684\u7db2\u8def\u5206\u5272\u3002.<\/div>\n<div translate=\"no\">\u56e0\u6b64\uff0c\u4eca\u5929\u8b93\u6211\u5011\u4f86\u6f84\u6e05\uff1a\u65e2\u7136\u6709\u8db3\u5920\u7684 IP \u4f4d\u5740\uff0c\u70ba\u4f55\u8981\u5206\u5272\u7db2\u8def\uff1f<\/div>\n<div translate=\"no\">\n<h2>I.\u91cd\u9ede\uff1a\u7db2\u8def\u5206\u5272\u8207\u300c\u7bc0\u7701 IP\u300d\u7121\u95dc\u201c<\/h2>\n<p>\u9019\u662f\u95dc\u65bc\u63a7\u5236\u6d41\u91cf\u3001\u6b0a\u9650\u548c\u98a8\u96aa\uff01<\/p>\n<\/div>\n<div translate=\"no\">\u7db2\u8def\u5206\u5272\u7684\u6838\u5fc3\u4e0d\u662f\u8cc7\u6e90\u7bc0\u7d04\uff0c\u800c\u662f\u7db2\u8def\u6cbb\u7406\u3002.<\/div>\n<div translate=\"no\">\u9019\u4e9b\u60c5\u6cc1\u807d\u8d77\u4f86\u662f\u5426\u5f88\u719f\u6089\uff1f<\/div>\n<div translate=\"no\">\n<ul>\n<li translate=\"no\">\u53d7\u611f\u67d3\u7684\u8fa6\u516c\u5ba4\u96fb\u8166\u5c0d\u6574\u5c64\u6a13\u7684\u88dd\u7f6e\u767c\u8d77 ARP \u653b\u64ca<\/li>\n<li translate=\"no\">\u8a2a\u5ba2\u88dd\u7f6e\u53ef\u76f4\u63a5 ping \u6838\u5fc3\u696d\u52d9\u4f3a\u670d\u5668<\/li>\n<li translate=\"no\">DHCP \u5c01\u5305\u96a8\u8655\u98c4\u6d6e\uff0c\u932f\u8aa4 VLAN \u4e2d\u7684\u88dd\u7f6e\u7372\u5f97\u4e0d\u6b63\u78ba\u7684 IP<\/li>\n<li translate=\"no\">\u670d\u52d9\u56e0\u4ea4\u53c9\u6d41\u91cf\u800c\u4f7f\u9023\u7d50\u4e0d\u582a\u8ca0\u8377\uff0c\u800c IT \u537b\u96e3\u4ee5\u8fa8\u8b58\u4f86\u6e90<\/li>\n<\/ul>\n<\/div>\n<div translate=\"no\">\u6839\u672c\u7684\u554f\u984c\u4e0d\u5728\u65bc\u6709\u592a\u591a\u7684\u88dd\u7f6e\uff0c\u800c\u662f\u7f3a\u4e4f\u7db2\u8def\u5340\u9694\uff0c\u9020\u6210\u7121\u908a\u754c\u7684\u74b0\u5883\u3002.<\/div>\n<div translate=\"no\">\n<h2>II.\u672a\u5206\u5272\u7684\u7db2\u8def\u5c31\u50cf\u4e00\u500b\u5927\u5bbf\u820d<\/h2>\n<p>\u5411\u5b89\u5168\u6027\u3001\u6548\u7387\u548c\u53ef\u7ba1\u7406\u6027\u8aaa\u518d\u898b\uff01<\/p>\n<\/div>\n<div translate=\"no\">\u9019\u6a23\u60f3\u5427\uff1a<\/div>\n<div translate=\"no\">\u2605 \u7121\u5206\u5272 = \u6240\u6709\u516c\u53f8\u8a2d\u5099\u90fd\u4f4f\u5728\u540c\u4e00\u500b\u300c\u5bbf\u820d\u300d\u3002\u7576\u6709\u4eba\u54b3\u55fd\u6642\uff0c\u6bcf\u500b\u4eba\u90fd\u6703\u807d\u5230\uff1b\u7576\u6709\u4eba\u653e\u706b\u6642\uff0c\u6574\u500b\u5bbf\u820d\u90fd\u6703\u71d2\u8d77\u4f86\u3002.<\/div>\n<div translate=\"no\">\u518d\u7d30\u5206\u4e0b\u4f86\uff0c\u60a8\u6703\u9047\u5230\u9019\u4e9b\u9677\u9631\uff1a<\/div>\n<div translate=\"no\">\n<h3>1.\u5ee3\u64ad\u6d2a\u6c34\u548c\u7a81\u7136\u7684 ARP \u98a8\u66b4<\/h3>\n<\/div>\n<div translate=\"no\">\u7b2c 2 \u5c64\u5ee3\u64ad (ARP\u3001DHCP\u3001\u7fa4\u64ad) \u4e26\u975e\u5b64\u7acb\u7684 \u6709\u4e86\u773e\u591a\u88dd\u7f6e\uff0c\u6bcf\u53f0\u65b0\u96fb\u8166\u90fd\u6703\u5411\u6574\u500b\u7db2\u8def\u5ee3\u64ad\uff0c\u8a62\u554f\u300c\u4f60\u662f\u8ab0\uff1f\u6700\u4f73\u60c5\u6cc1\uff1aNIC \u5229\u7528\u7387\u9ad8\uff1b\u6700\u58de\u60c5\u6cc1\uff1a\u670d\u52d9\u7bc4\u570d\u5167\u7684\u5ef6\u9072 \u4e0d\u8981\u4ee5\u70ba\u300c\u5e7e\u5341\u53f0\u6a5f\u5668\u300d\u6c92\u6709\u95dc\u4fc2 - \u4e00\u65e6\u52a0\u5165 IoT \u88dd\u7f6e\u6216\u5b89\u5168\u651d\u5f71\u6a5f\uff0c\u60a8\u5f88\u5feb\u5c31\u6703\u63a5\u89f8\u5230\u6578\u4ee5\u5343\u8a08\u7684\u7aef\u9ede\u3002.<\/div>\n<div translate=\"no\">\n<h3>2.\u5b89\u5168\u6b0a\u9650\u8b8a\u5f97\u7121\u6cd5\u7ba1\u7406 - \u7121\u754c\u9650\u5373\u7121\u898f\u5247<\/h3>\n<\/div>\n<div translate=\"no\">\u4f8b\u5982\uff1a<\/div>\n<div translate=\"no\">\u8ca1\u52d9\u7cfb\u7d71\u3001\u8a2a\u5ba2\u7db2\u8def\u548c\u8fa6\u516c\u5ba4 PC \u90fd\u5171\u7528\u4e00\u500b\u5927\u578b\u7db2\u6bb5 \u4e00\u500b\u99ed\u5ba2\u5e36\u5165\u4e00\u500b\u5916\u90e8\u88dd\u7f6e\uff0c\u6383\u63cf\u6574\u500b 192.168.1.0\/24\uff0c\u4e26\u7acb\u5373\u77e5\u9053\u60a8\u7684\u8cc7\u7522\u4f48\u5c40 \u5982\u4f55\u9810\u9632\u9019\u7a2e\u60c5\u6cc1\uff1fACL \u8b8a\u5f97\u96e3\u4ee5\u64b0\u5beb\uff0c\u9632\u706b\u7246\u898f\u5247\u8b8a\u5f97\u8907\u96dc\u3002.<\/div>\n<div translate=\"no\">\n<p>\u900f\u904e\u9069\u7576\u7684\u5206\u5272\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u5957\u7528 ACL \u6216 VLAN \u9650\u5236\uff1a<\/p>\n<div translate=\"no\">\n<div data-testid=\"youchat-code\">\n<div>\n<div>javascript<\/div>\n<div><\/div>\n<\/div>\n<div>\n<pre>deny finance_vlan to visitor_vlan\r\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div translate=\"no\">\u908a\u754c\u4f7f\u63a7\u5236\u6210\u70ba\u53ef\u80fd\u3002.<\/div>\n<div translate=\"no\">\n<h3>3.\u7591\u96e3\u6392\u89e3\u8b8a\u6210\u8b0e\u5718 - \u9023\u64f7\u53d6\u5c01\u5305\u90fd\u5f88\u56f0\u96e3<\/h3>\n<\/div>\n<div translate=\"no\">\u7576\u8abf\u67e5\u7279\u5b9a\u88dd\u7f6e\u4e0a\u7684\u5c01\u5305\u907a\u5931\u6642\uff0c\u60a8\u7684\u6574\u500b\u7db2\u8def\u5340\u6bb5\u5305\u542b\u6df7\u5408\u6d41\u91cf\uff1a<\/div>\n<div translate=\"no\">\n<ul>\n<li translate=\"yes\">\u54ea\u4e9b\u6d41\u91cf\u5c6c\u65bc\u5b89\u5168\u651d\u5f71\u6a5f\uff1f<\/li>\n<li translate=\"yes\">\u54ea\u4e9b\u5c6c\u65bc\u8fa6\u516c\u5ba4\u7cfb\u7d71\uff1f<\/li>\n<li translate=\"no\">\u54ea\u4e9b\u662f\u4f86\u81ea\u4f7f\u7528 Zoom \u7684\u4e3b\u7ba1\uff1f<\/li>\n<\/ul>\n<\/div>\n<div translate=\"no\">\u60a8\u64f7\u53d6\u7684\u5c01\u5305\u5145\u6eff\u5ee3\u64ad\u8a0a\u606f\uff0c\u5e7e\u4e4e\u7121\u6cd5\u9032\u884c\u5206\u6790\u3002.<\/div>\n<div translate=\"no\">\u900f\u904e\u9069\u7576\u7684\u5340\u9694\uff0c\u60a8\u53ef\u4ee5\u4f9d\u64da\u300c\u696d\u52d9\u7dda\u300d\u8b58\u5225\u554f\u984c\uff0c\u8b93\u60a8\u7684\u64f7\u53d6\u66f4\u7cbe\u78ba\uff0c\u6545\u969c\u6392\u9664\u66f4\u5feb\u901f\u3002.<\/div>\n<div translate=\"no\">\n<h3>4.\u4e0a\u5c64\u88dd\u7f6e\u9762\u81e8\u9ad8\u58d3\u8207\u4f4e\u8f49\u767c\u6548\u7387\u7684\u554f\u984c<\/h3>\n<\/div>\n<div translate=\"no\">\u5c07\u6578\u4ee5\u5343\u8a08\u7684\u88dd\u7f6e\u64e0\u9032\u4e00\u500b\u7db2\u6bb5\uff0c\u6703\u8b93\u60a8\u7684\u7b2c 3 \u5c64\u88dd\u7f6e\u7684 ARP \u8868\u548c MAC \u8868\u6210\u70ba\u707d\u96e3\u5340\uff1a<\/div>\n<div translate=\"no\">\n<ul>\n<li translate=\"yes\">ARP \u9805\u76ee\u7206\u70b8<\/li>\n<li translate=\"yes\">MAC \u8868\u5927\u5e45\u6ce2\u52d5<\/li>\n<li translate=\"no\">DHCP \u4f4d\u5740\u885d\u7a81\u7d93\u5e38\u767c\u751f<\/li>\n<\/ul>\n<\/div>\n<div translate=\"no\">\u90a3\u9ebc\u554f\u984c\u5c31\u4e0d\u662f\u300c\u7db2\u8def\u9023\u7dda\u4e86\u55ce\uff1f\u300d\u800c\u662f\u300c\u70ba\u4ec0\u9ebc\u7db2\u8def\u6703\u6162\u5230\u8b93\u4eba\u89ba\u5f97\u65b7\u7dda\u4e86\uff1f\u201c<\/div>\n<div translate=\"no\">\n<h2>III.\u5982\u4f55\u6b63\u78ba\u5206\u5272\u7db2\u8def\uff1f<\/h2>\n<p>\u96d6\u7136\u6c92\u6709\u6a19\u6e96\u7684\u7b54\u6848\uff0c\u4f46\u4ee5\u4e0b\u662f\u5be6\u969b\u7684\u5171\u8b58\u65b9\u6cd5\uff1a<\/p>\n<\/div>\n<div translate=\"no\">\n<h3>1.\u6309\u529f\u80fd\/\u670d\u52d9\u5283\u5206<\/h3>\n<\/div>\n<div translate=\"no\">\u4e00\u4e9b\u5178\u578b\u7684\u5206\u5272\u65b9\u6cd5\uff1a<\/div>\n<div translate=\"no\">\n<ul>\n<li translate=\"yes\">\u7db2\u8def\u8a2d\u5099\u7684\u7ba1\u7406 VLAN (<a href=\"https:\/\/www.key-iot.com\/zh_tw\/iotproduct\/cellular-routers\/\"><strong>\u5de5\u696d\u8def\u7531\u5668<\/strong><\/a>, \u4ea4\u63db\u5668\u3001AP\uff09<\/li>\n<li translate=\"yes\">\u9069\u7528\u65bc\u4f01\u696d\u4f3a\u670d\u5668\u7684\u4f3a\u670d\u5668 VLAN<\/li>\n<li translate=\"yes\">\u54e1\u5de5\u5de5\u4f5c\u7ad9\u7684\u8fa6\u516c\u5ba4 VLAN<\/li>\n<li translate=\"yes\">\u8a2a\u5ba2 VLAN<\/li>\n<li translate=\"no\">\u9069\u7528\u65bc\u651d\u5f71\u6a5f\u3001\u611f\u6e2c\u5668\u548c\u5176\u4ed6\u667a\u6167\u578b\u88dd\u7f6e\u7684 IoT VLAN<\/li>\n<\/ul>\n<\/div>\n<div translate=\"no\">\n<h3>2.\u6309\u6a13\u5c64\/\u5340\u57df\u5206\u5272\u4e5f\u6709\u6548<\/h3>\n<\/div>\n<div translate=\"no\">\n<ul>\n<li translate=\"yes\">\u4e00\u6a13\u5f97\u5230\u4e00\u500b\u5340\u6bb5\uff0c\u4e8c\u6a13\u5f97\u5230\u53e6\u4e00\u500b\u5340\u6bb5<\/li>\n<li translate=\"no\">\u6771\u8fa6\u516c\u5340\u5f97\u5230\u4e00\u500b\u5340\u6bb5\uff0c\u897f\u8fa6\u516c\u5340\u5f97\u5230\u53e6\u4e00\u500b\u5340\u6bb5<\/li>\n<\/ul>\n<\/div>\n<div translate=\"no\">\u6b64\u65b9\u6cd5\u8207\u4ea4\u63db\u6a5f\u5206\u4f48\u4fdd\u6301\u4e00\u81f4\uff0c\u4f7f\u7ba1\u7406\u66f4\u52a0\u660e\u78ba\uff0c\u4e26\u53ef\u7acb\u5373\u8b58\u5225\u9023\u7d50\u554f\u984c\u3002.<\/div>\n<div translate=\"no\">\n<h3>3.\u6bcf\u500b\u7db2\u6bb5\u4e0d\u61c9\u8d85\u904e 200 \u53f0\u88dd\u7f6e<\/h3>\n<\/div>\n<div translate=\"no\">\u6700\u5e38\u898b\u7684\u662f \/24 \u7db2\u8def (\u6700\u591a 254 \u500b IP)\uff1b\u7576\u8d85\u904e\u6b64\u9650\u5236\u6642\uff0c\u8acb\u8003\u616e\u9032\u4e00\u6b65\u7684\u5b50\u7db2\u8def\u5206\u5272\u3002\u6216\u8005\uff0c\u5be6\u65bd\u7b2c 3 \u5c64\u9598\u9053\u5668\u4f86\u5206\u5272\u5ee3\u64ad\u7db2\u57df\uff0c\u9632\u6b62\u5ee3\u64ad\u98a8\u66b4\u3002.<\/div>\n<div translate=\"no\">\n<h2>\u7d50\u8ad6\uff1a<\/h2>\n<p>\u662f\u5426\u6709\u8db3\u5920\u7684 IP \u4f4d\u5740\u662f\u8cc7\u6e90\u554f\u984c\uff1b\u662f\u5426\u5206\u5272\u7db2\u8def\u662f\u7ba1\u7406\u554f\u984c\u3002.<\/p>\n<\/div>\n<div translate=\"no\">\u4e0d\u8981\u4ee5\u70ba\u5206\u914d\u4e86\u6240\u6709\u7684 IP \u5c31\u5b8c\u4e8b\u4e86\u3002\u771f\u6b63\u80fd\u8b93\u60a8\u7684\u7cfb\u7d71\u7a69\u5b9a\u3001\u5b89\u5168\u4e14\u53ef\u63a7\u7684\uff0c\u662f\u60a8\u662f\u5426\u4ee5\u9069\u7576\u7684\u908a\u754c\u6e05\u695a\u5206\u5272\u60a8\u7684\u7db2\u8def\u3002.<\/div>\n<div translate=\"no\"><\/div>\n<div translate=\"no\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Many people learning networking who reach the IP addressing topic often wonder: &#8220;My company only has a few dozen devices, and one network segment is enough for all our IP addresses. Why divide into so many subnets?&#8221; Don&#8217;t laugh\u2014this isn&#8217;t just a beginner&#8217;s question. Many network engineers with years of experience fall into this trap: [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3874,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3871","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"metadata":{"classic-editor-remember":["classic-editor"],"_edit_lock":["1751874865:1"],"_edit_last":["1"],"themepark_seo_title":["Why Segment Networks Even When IP Addresses Are Sufficient?"],"themepark_seo_description":["\"My company only has a few dozen devices, and one network segment is enough for all our IP addresses. Why divide into so many subnets?\"\r\nDon't laugh\u2014this isn't just a beginner's question. Many network engineers with years of experience fall into this trap: Having enough IP addresses \u2260 Proper network segmentation."],"themepark_seo_keyword":[" IP Addresses"],"catce":["sidebar-widgets4"],"_yoast_wpseo_primary_category":["16"],"_yoast_wpseo_metadesc":["Whether you have enough IP addresses is a resource issue; Whether to segment your network is a governance issue.Don't think you're finished just because you've allocated all your IPs. 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