255是什么意思 255是什么意思
\u5b50\u7f51\u63a9\u7801255.255.255.255\u4ec0\u4e48\u610f\u601dIP\u5730\u5740\u662f32\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u503c\uff0c\u7528\u4e8e\u5728TCP/IP\u901a\u8baf\u534f\u8bae\u4e2d\u6807\u8bb0\u6bcf\u53f0\u8ba1\u7b97\u673a\u7684\u5730\u5740\u3002\u901a\u5e38\u6211\u4eec\u4f7f\u7528\u70b9\u5f0f\u5341\u8fdb\u5236\u6765\u8868\u793a\uff0c\u5982192.168.0.5\u7b49\u7b49\u3002
\u6bcf\u4e2aIP\u5730\u5740\u53c8\u53ef\u5206\u4e3a\u4e24\u90e8\u5206\u3002\u5373\u7f51\u7edc\u53f7\u90e8\u5206\u548c\u4e3b\u673a\u53f7\u90e8\u5206\uff1a\u7f51\u7edc\u53f7\u8868\u793a\u5176\u6240\u5c5e\u7684\u7f51\u7edc\u6bb5\u7f16\u53f7\uff0c\u4e3b\u673a\u53f7\u5219\u8868\u793a\u8be5\u7f51\u6bb5\u4e2d\u8be5\u4e3b\u673a\u7684\u5730\u5740\u7f16\u53f7\u3002\u6309\u7167\u7f51\u7edc\u89c4\u6a21\u7684\u5927\u5c0f\uff0cIP\u5730\u5740\u53ef\u4ee5\u5206\u4e3aA\u3001B\u3001C\u3001D\u3001E\u4e94\u7c7b\uff0c\u5176\u4e2dA\u3001B\u3001C\u7c7b\u662f\u4e09\u79cd\u4e3b\u8981\u7684\u7c7b\u578b\u5730\u5740\uff0cD\u7c7b\u4e13\u4f9b\u591a\u76ee\u4f20\u9001\u7528\u7684\u591a\u76ee\u5730\u5740\uff0cE\u7c7b\u7528\u4e8e\u6269\u5c55\u5907\u7528\u5730\u5740\u3002A\u3001B\u3001 C\u4e09\u7c7bIP\u5730\u5740\u6709\u6548\u8303\u56f4\u5982\u4e0b\u8868\uff1a
\u7c7b\u522b \u7f51\u7edc\u53f7 /\u5360\u4f4d\u6570 \u4e3b\u673a\u53f7 /\u5360\u4f4d\u6570 \u7528\u9014
A 1\uff5e126 / 8 0\uff5e255 0\uff5e255 1\uff5e254 / 24 \u56fd\u5bb6\u7ea7
B 128\uff5e191 0\uff5e255 / 16 0\uff5e255 1\uff5e254 / 16 \u8de8\u8fc7\u7ec4\u7ec7
C 192\uff5e223 0\uff5e255 0\uff5e255 / 24 1\uff5e254 / 8 \u4f01\u4e1a\u7ec4\u7ec7
\u968f\u7740\u4e92\u8fde\u7f51\u5e94\u7528\u7684\u4e0d\u65ad\u6269\u5927\uff0c\u539f\u5148\u7684IPv4\u7684\u5f0a\u7aef\u4e5f\u9010\u6e10\u66b4\u9732\u51fa\u6765\uff0c\u5373\u7f51\u7edc\u53f7\u5360\u4f4d\u592a\u591a\uff0c\u800c\u4e3b\u673a\u53f7\u4f4d\u592a\u5c11\uff0c\u6240\u4ee5\u5176\u80fd\u63d0\u4f9b\u7684\u4e3b\u673a\u5730\u5740\u4e5f\u8d8a\u6765\u8d8a\u7a00\u7f3a\uff0c\u76ee\u524d\u9664\u4e86\u4f7f\u7528NAT\u5728\u4f01\u4e1a\u5185\u90e8\u5229\u7528\u4fdd\u7559\u5730\u5740\u81ea\u884c\u5206\u914d\u4ee5\u5916\uff0c\u901a\u5e38\u90fd\u5bf9\u4e00\u4e2a\u9ad8\u7c7b\u522b\u7684IP\u5730\u5740\u8fdb\u884c\u518d\u5212\u5206\uff0c\u4ee5\u5f62\u6210\u591a\u4e2a\u5b50\u7f51\uff0c\u63d0\u4f9b\u7ed9\u4e0d\u540c\u89c4\u6a21\u7684\u7528\u6237\u7fa4\u4f7f\u7528\u3002
\u8fd9\u91cc\u4e3b\u8981\u662f\u4e3a\u4e86\u5728\u7f51\u7edc\u5206\u6bb5\u60c5\u51b5\u4e0b\u6709\u6548\u5730\u5229\u7528IP\u5730\u5740\uff0c\u901a\u8fc7\u5bf9\u4e3b\u673a\u53f7\u7684\u9ad8\u4f4d\u90e8\u5206\u53d6\u4f5c\u4e3a\u5b50\u7f51\u53f7\uff0c\u4ece\u901a\u5e38\u7684\u7f51\u7edc\u4f4d\u754c\u9650\u4e2d\u6269\u5c55\u6216\u538b\u7f29\u5b50\u7f51\u63a9\u7801\uff0c\u7528\u6765\u521b\u5efa\u67d0\u7c7b\u5730\u5740\u7684\u66f4\u591a\u5b50\u7f51\u3002\u4f46\u521b\u5efa\u66f4\u591a\u7684\u5b50\u7f51\u65f6\uff0c\u5728\u6bcf\u4e2a\u5b50\u7f51\u4e0a\u7684\u53ef\u7528\u4e3b\u673a\u5730\u5740\u6570\u76ee\u4f1a\u6bd4\u539f\u5148\u51cf\u5c11\u3002
\u5b50\u7f51\u63a9\u7801\u662f\u6807\u5fd7\u4e24\u4e2aIP\u5730\u5740\u662f\u5426\u540c\u5c5e\u4e8e\u4e00\u4e2a\u5b50\u7f51\u7684\uff0c\u4e5f\u662f32\u4f4d\u4e8c\u8fdb\u5236\u5730\u5740\uff0c\u5176\u6bcf\u4e00\u4e2a\u4e3a1\u4ee3\u8868\u8be5\u4f4d\u662f\u7f51\u7edc\u4f4d\uff0c\u4e3a0\u4ee3\u8868\u4e3b\u673a\u4f4d\u3002\u5b83\u548cIP\u5730\u5740\u4e00\u6837\u4e5f\u662f\u4f7f\u7528\u70b9\u5f0f\u5341\u8fdb\u5236\u6765\u8868\u793a\u7684\u3002\u5982\u679c\u4e24\u4e2aIP\u5730\u5740\u5728\u5b50\u7f51\u63a9\u7801\u7684\u6309\u4f4d\u4e0e\u7684\u8ba1\u7b97\u4e0b\u6240\u5f97\u7ed3\u679c\u76f8\u540c\uff0c\u5373\u8868\u660e\u5b83\u4eec\u5171\u5c5e\u4e8e\u540c\u4e00\u5b50\u7f51\u4e2d\u3002
\u5728\u8ba1\u7b97\u5b50\u7f51\u63a9\u7801\u65f6\uff0c\u6211\u4eec\u8981\u6ce8\u610fIP\u5730\u5740\u4e2d\u7684\u4fdd\u7559\u5730\u5740\uff0c\u5373\u201c 0\u201d\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\uff0c\u5b83\u4eec\u662f\u6307\u4e3b\u673a\u5730\u5740\u6216\u7f51\u7edc\u5730\u5740\u5168\u4e3a\u201c 0\u201d\u6216\u201c 1\u201d\u65f6\u7684IP\u5730\u5740\uff0c\u5b83\u4eec\u4ee3\u8868\u7740\u672c\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\uff0c\u4e00\u822c\u662f\u4e0d\u80fd\u88ab\u8ba1\u7b97\u5728\u5185\u7684\u3002
\u4e0b\u9762\u5c31\u6765\u4ee5\u5b9e\u4f8b\u6765\u8bf4\u660e\u5b50\u7f51\u63a9\u7801\u7684\u7b97\u6cd5\uff1a
\u5bf9\u4e8e\u65e0\u987b\u518d\u5212\u5206\u6210\u5b50\u7f51\u7684IP\u5730\u5740\u6765\u8bf4\uff0c\u5176\u5b50\u7f51\u63a9\u7801\u975e\u5e38\u7b80\u5355\uff0c\u5373\u6309\u7167\u5176\u5b9a\u4e49\u5373\u53ef\u5199\u51fa\uff1a\u5982\u67d0B\u7c7bIP\u5730\u5740\u4e3a 10.12.3.0\uff0c\u65e0\u987b\u518d\u5206\u5272\u5b50\u7f51\uff0c\u5219\u8be5IP\u5730\u5740\u7684\u5b50\u7f51\u63a9\u7801\u4e3a255.255.0.0\u3002\u5982\u679c\u5b83\u662f\u4e00\u4e2aC\u7c7b\u5730\u5740\uff0c\u5219\u5176\u5b50\u7f51\u63a9\u7801\u4e3a 255.255.255.0\u3002\u5176\u5b83\u7c7b\u63a8\uff0c\u4e0d\u518d\u8be6\u8ff0\u3002\u4e0b\u9762\u6211\u4eec\u5173\u952e\u8981\u4ecb\u7ecd\u7684\u662f\u4e00\u4e2aIP\u5730\u5740\uff0c\u8fd8\u9700\u8981\u5c06\u5176\u9ad8\u4f4d\u4e3b\u673a\u4f4d\u518d\u4f5c\u4e3a\u5212\u5206\u51fa\u7684\u5b50\u7f51\u7f51\u7edc\u53f7\uff0c\u5269\u4e0b\u7684\u662f\u6bcf\u4e2a\u5b50\u7f51\u7684\u4e3b\u673a\u53f7\uff0c\u8fd9\u65f6\u8be5\u5982\u4f55\u8fdb\u884c\u6bcf\u4e2a\u5b50\u7f51\u7684\u63a9\u7801\u8ba1\u7b97\u3002
\u4e00\u3001\u5229\u7528\u5b50\u7f51\u6570\u6765\u8ba1\u7b97
\u5728\u6c42\u5b50\u7f51\u63a9\u7801\u4e4b\u524d\u5fc5\u987b\u5148\u641e\u6e05\u695a\u8981\u5212\u5206\u7684\u5b50\u7f51\u6570\u76ee\uff0c\u4ee5\u53ca\u6bcf\u4e2a\u5b50\u7f51\u5185\u7684\u6240\u9700\u4e3b\u673a\u6570\u76ee\u3002
1)\u5c06\u5b50\u7f51\u6570\u76ee\u8f6c\u5316\u4e3a\u4e8c\u8fdb\u5236\u6765\u8868\u793a
2)\u53d6\u5f97\u8be5\u4e8c\u8fdb\u5236\u7684\u4f4d\u6570\uff0c\u4e3a N
3)\u53d6\u5f97\u8be5IP\u5730\u5740\u7684\u7c7b\u5b50\u7f51\u63a9\u7801\uff0c\u5c06\u5176\u4e3b\u673a\u5730\u5740\u90e8\u5206\u7684\u7684\u524dN\u4f4d\u7f6e 1 \u5373\u5f97\u51fa\u8be5IP\u5730\u5740\u5212\u5206\u5b50\u7f51\u7684\u5b50\u7f51\u63a9\u7801\u3002
\u5982\u6b32\u5c06B\u7c7bIP\u5730\u5740168.195.0.0\u5212\u5206\u621027\u4e2a\u5b50\u7f51\uff1a
1)27=11011
2)\u8be5\u4e8c\u8fdb\u5236\u4e3a\u4e94\u4f4d\u6570\uff0cN = 5
3)\u5c06B\u7c7b\u5730\u5740\u7684\u5b50\u7f51\u63a9\u7801255.255.0.0\u7684\u4e3b\u673a\u5730\u5740\u524d5\u4f4d\u7f6e 1\uff0c\u5f97\u5230 255.255.248.0
\u5373\u4e3a\u5212\u5206\u6210 27\u4e2a\u5b50\u7f51\u7684B\u7c7bIP\u5730\u5740 168.195.0.0\u7684\u5b50\u7f51\u63a9\u7801\u3002
\u4e8c\u3001\u5229\u7528\u4e3b\u673a\u6570\u6765\u8ba1\u7b97
1)\u5c06\u4e3b\u673a\u6570\u76ee\u8f6c\u5316\u4e3a\u4e8c\u8fdb\u5236\u6765\u8868\u793a
2)\u5982\u679c\u4e3b\u673a\u6570\u5c0f\u4e8e\u6216\u7b49\u4e8e254\uff08\u6ce8\u610f\u53bb\u6389\u4fdd\u7559\u7684\u4e24\u4e2aIP\u5730\u5740\uff09\uff0c\u5219\u53d6\u5f97\u8be5\u4e3b\u673a\u7684\u4e8c\u8fdb\u5236\u4f4d\u6570\uff0c\u4e3a N\uff0c\u8fd9\u91cc\u80af\u5b9a N8\uff0c\u8fd9\u5c31\u662f\u8bf4\u4e3b\u673a\u5730\u5740\u5c06\u5360\u636e\u4e0d\u6b628\u4f4d\u3002
3)\u4f7f\u7528255.255.255.255\u6765\u5c06\u8be5\u7c7bIP\u5730\u5740\u7684\u4e3b\u673a\u5730\u5740\u4f4d\u6570\u5168\u90e8\u7f6e1\uff0c\u7136\u540e\u4ece\u540e\u5411\u524d\u7684\u5c06N\u4f4d\u5168\u90e8\u7f6e\u4e3a 0\uff0c\u5373\u4e3a\u5b50\u7f51\u63a9\u7801\u503c\u3002
\u5982\u6b32\u5c06B\u7c7bIP\u5730\u5740168.195.0.0\u5212\u5206\u6210\u82e5\u5e72\u5b50\u7f51\uff0c\u6bcf\u4e2a\u5b50\u7f51\u5185\u6709\u4e3b\u673a700\u53f0\uff1a
1) 700=1010111100
2)\u8be5\u4e8c\u8fdb\u5236\u4e3a\u5341\u4f4d\u6570\uff0cN = 10
3)\u5c06\u8be5B\u7c7b\u5730\u5740\u7684\u5b50\u7f51\u63a9\u7801255.255.0.0\u7684\u4e3b\u673a\u5730\u5740\u5168\u90e8\u7f6e 1\uff0c\u5f97\u5230255.255.255.255
\u7136\u540e\u518d\u4ece\u540e\u5411\u524d\u5c06\u540e 10\u4f4d\u7f6e0,\u5373\u4e3a\uff1a 11111111.11111111.11111100.00000000
\u5373255.255.252.0\u3002\u8fd9\u5c31\u662f\u8be5\u6b32\u5212\u5206\u6210\u4e3b\u673a\u4e3a700\u53f0\u7684B\u7c7bIP\u5730\u5740 168.195.0.0\u7684\u5b50\u7f51\u63a9\u7801\u3002
\u4e0b\u9762\u5217\u51fa\u5404\u7c7bIP\u5730\u5740\u6240\u80fd\u5212\u5206\u51fa\u7684\u6240\u6709\u5b50\u7f51\uff0c\u5176\u5212\u5206\u540e\u7684\u4e3b\u673a\u548c\u5b50\u7f51\u5360\u4f4d\u6570\uff0c\u4ee5\u53ca\u4e3b\u673a\u548c\u5b50\u7f51\u7684\uff08\u6700\u5927\uff09\u6570\u76ee\uff0c\u6ce8\u610f\u8981\u53bb\u6389\u4fdd\u7559\u7684IP\u5730\u5740(\u5373\u5212\u5206\u540e\u6709\u4e3b\u673a\u4f4d\u6216\u5b50\u7f51\u4f4d\u5168\u4e3a\u201c0\u201d\u6216\u5168\u4e3a\u201c1\u201d\u7684)\uff1a
A\u7c7bIP\u5730\u5740\uff1a
\u5b50\u7f51\u4f4d /\u4e3b\u673a\u4f4d \u5b50\u7f51\u63a9\u7801 \u5b50\u7f51\u6700\u5927\u6570 /\u4e3b\u673a\u6700\u5927\u6570
2/22 255.192.0.0 2/4194302
3/21 255.224.0.0 6/2097150
4/20 255.240.0.0 14/1048574
5/19 255.248.0.0 30/524286
6/18 255.252.0.0 62/262142
7/17 255.254.0.0 126/131070
8/16 255.255.0.0 254/65536
9/15 255.255.128.0 510/32766
10/14 255.255.192.0 1022/16382
11/13 255.255.224.0 2046/8190
12/12 255.255.240.0 4094/4094
13/11 255.255.248.0 8190/2046
14/10 255.255.252.0 16382/1022
15/9 255.255.254.0 32766/510
16/8 255.255.255.0 65536/254
17/7 255.255.255.128 131070/126
18/6 255.255.255.192 262142/62
19/5 255.255.255.224 524286/30
20/4 255.255.255.240 1048574/14
21/3 255.255.255.248 2097150/6
22/2 255.255.255.252 4194302/2
B\u7c7bIP\u5730\u5740\uff1a
\u5b50\u7f51\u4f4d /\u4e3b\u673a\u4f4d \u5b50\u7f51\u63a9\u7801 \u5b50\u7f51\u6700\u5927\u6570 /\u4e3b\u673a\u6700\u5927\u6570
2/14 255.255.192.0 2/16382
3/13 255.255.224.0 6/8190
4/12 255.255.240.0 14/4094
5/11 255.255.248.0 30/2046
6/10 255.255.252.0 62/1022
7/9 255.255.254.0 126/510
8/8 255.255.255.0 254/254
9/7 255.255.255.128 510/126
10/6 255.255.255.192 1022/62
11/5 255.255.255.224 2046/30
12/4 255.255.255.240 4094/14
13/3 255.255.255.248 8190/6
14/2 255.255.255.252 16382/2
C\u7c7bIP\u5730\u5740\uff1a
\u5b50\u7f51\u4f4d /\u4e3b\u673a\u4f4d \u5b50\u7f51\u63a9\u7801 \u5b50\u7f51\u6700\u5927\u6570 /\u4e3b\u673a\u6700\u5927\u6570
2/6 255.255.255.192 2/62
3/5 255.255.255.224 6/30
4/4 255.255.255.240 14/14
5/3 255.255.255.248 30/6
6/2 255.255.255.252 62/2
\u518d\u6839\u636eCCNA\u4e2d\u4f1a\u51fa\u73b0\u7684\u9898\u76ee\u7ed9\u5927\u5bb6\u4e3e\u4e2a\u4f8b\u5b50\uff1a
\u9996\u5148\uff0c\u6211\u4eec\u770b\u4e00\u4e2a\u8003\u8bd5\u4e2d\u5e38\u89c1\u7684\u9898\u578b\uff1a\u4e00\u4e2a\u4e3b\u673a\u7684IP\u5730\u5740\u662f202.112.14.137\uff0c\u63a9\u7801\u662f255.255.255.224\uff0c\u8981\u6c42\u8ba1\u7b97\u8fd9\u4e2a\u4e3b\u673a\u6240\u5728\u7f51\u7edc\u7684\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\u3002
\u5e38\u89c4\u529e\u6cd5\u662f\u628a\u8fd9\u4e2a\u4e3b\u673a\u5730\u5740\u548c\u5b50\u7f51\u63a9\u7801\u90fd\u6362\u7b97\u6210\u4e8c\u8fdb\u5236\u6570\uff0c\u4e24\u8005\u8fdb\u884c\u903b\u8f91\u4e0e\u8fd0\u7b97\u540e\u5373\u53ef\u5f97\u5230\u7f51\u7edc\u5730\u5740\u3002\u5176\u5b9e\u5927\u5bb6\u53ea\u8981\u4ed4\u7ec6\u60f3\u60f3\uff0c\u53ef\u4ee5\u5f97\u5230\u53e6\u4e00\u4e2a\u65b9\u6cd5\uff1a 255.255.255.224\u7684\u63a9\u7801\u6240\u5bb9\u7eb3\u7684IP\u5730\u5740\u6709256\uff0d224\uff1d32\u4e2a\uff08\u5305\u62ec\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\uff09\uff0c\u90a3\u4e48\u5177\u6709\u8fd9\u79cd\u63a9\u7801\u7684\u7f51\u7edc\u5730\u5740\u4e00\u5b9a\u662f32\u7684\u500d\u6570\u3002\u800c\u7f51\u7edc\u5730\u5740\u662f\u5b50\u7f51IP\u5730\u5740\u7684\u5f00\u59cb\uff0c\u5e7f\u64ad\u5730\u5740\u662f\u7ed3\u675f\uff0c\u53ef\u4f7f\u7528\u7684\u4e3b\u673a\u5730\u5740\u5728\u8fd9\u4e2a\u8303\u56f4\u5185\uff0c\u56e0\u6b64\u7565\u5c0f\u4e8e137\u800c\u53c8\u662f32\u7684\u500d\u6570\u7684\u53ea\u6709128\uff0c\u6240\u4ee5\u5f97\u51fa\u7f51\u7edc\u5730\u5740\u662f202.112.14.128\u3002\u800c\u5e7f\u64ad\u5730\u5740\u5c31\u662f\u4e0b\u4e00\u4e2a\u7f51\u7edc\u7684\u7f51\u7edc\u5730\u5740\u51cf1\u3002\u800c\u4e0b\u4e00\u4e2a32\u7684\u500d\u6570\u662f160\uff0c\u56e0\u6b64\u53ef\u4ee5\u5f97\u5230\u5e7f\u64ad\u5730\u5740\u4e3a 202.112.14.159\u3002\u53ef\u53c2\u7167\u4e0b\u8868\u6765\u7406\u89e3\u672c\u4f8b\u3002
\u5b50\u7f51\u7edc 2\u8fdb\u5236\u5b50\u7f51\u7edc\u57df\u6570 2\u8fdb\u5236\u4e3b\u673a\u57df\u6570\u7684\u8303\u56f4 2\u8fdb\u5236\u4e3b\u673a\u57df\u6570\u7684\u8303\u56f4
\u7b2c1\u4e2a\u5b50\u7f51\u7edc 000 00000 thru 11111 .0 thru.31
\u7b2c2\u4e2a\u5b50\u7f51\u7edc 001 00000 thru 11111 .32 thru.63
\u7b2c3\u4e2a\u5b50\u7f51\u7edc 010 00000 thru 11111 .64 thru.95
\u7b2c4\u4e2a\u5b50\u7f51\u7edc 011 00000 thru 11111 .96 thru.127
\u7b2c5\u4e2a\u5b50\u7f51\u7edc 100 00000 thru 11111 .128 thru.159
\u7b2c6\u4e2a\u5b50\u7f51\u7edc 101 00000 thru 11111 .160 thru.191
\u7b2c7\u4e2a\u5b50\u7f51\u7edc 110 00000 thru 11111 .192 thru.223
\u7b2c8\u4e2a\u5b50\u7f51\u7edc 111 00000 thru 11111 .124 thru.255
CCNA\u8003\u8bd5\u4e2d\uff0c\u8fd8\u6709\u4e00\u79cd\u9898\u578b\uff0c\u8981\u4f60\u6839\u636e\u6bcf\u4e2a\u7f51\u7edc\u7684\u4e3b\u673a\u6570\u91cf\u8fdb\u884c\u5b50\u7f51\u5730\u5740\u7684\u89c4\u5212\u548c\u8ba1\u7b97\u5b50\u7f51\u63a9\u7801\u3002\u8fd9\u4e5f\u53ef\u6309\u4e0a\u8ff0\u539f\u5219\u8fdb\u884c\u8ba1\u7b97\u3002\u6bd4\u5982\u4e00\u4e2a\u5b50\u7f51\u670910\u53f0\u4e3b\u673a\uff0c\u90a3\u4e48\u5bf9\u4e8e\u8fd9\u4e2a\u5b50\u7f51\u9700\u8981\u7684IP\u5730\u5740\u662f\uff1a
10\uff0b1\uff0b1\uff0b1\uff1d13
\u6ce8\u610f\uff1a\u52a0\u7684\u7b2c\u4e00\u4e2a1\u662f\u6307\u8fd9\u4e2a\u7f51\u7edc\u8fde\u63a5\u65f6\u6240\u9700\u7684\u7f51\u5173\u5730\u5740\uff0c\u63a5\u7740\u7684\u4e24\u4e2a1\u5206\u522b\u662f\u6307\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\u3002\u56e0\u4e3a13\u5c0f\u4e8e16\uff0816\u7b49\u4e8e2\u76844\u6b21\u65b9\uff09\uff0c\u6240\u4ee5\u4e3b\u673a\u4f4d\u4e3a4\u4f4d\u3002\u800c
256\uff0d16\uff1d240
\u6240\u4ee5\u8be5\u5b50\u7f51\u63a9\u7801\u4e3a255.255.255.240\u3002
\u5982\u679c\u4e00\u4e2a\u5b50\u7f51\u670914\u53f0\u4e3b\u673a\uff0c\u4e0d\u5c11\u4eba\u5e38\u72af\u7684\u9519\u8bef\u662f\uff1a\u4f9d\u7136\u5206\u914d\u5177\u670916\u4e2a\u5730\u5740\u7a7a\u95f4\u7684\u5b50\u7f51\uff0c\u800c\u5fd8\u8bb0\u4e86\u7ed9\u7f51\u5173\u5206\u914d\u5730\u5740\u3002\u8fd9\u6837\u5c31\u9519\u8bef\u4e86\uff0c\u56e0\u4e3a\uff1a
14\uff0b1\uff0b1\uff0b1\uff1d17
17\u5927\u4e8e16\uff0c\u6240\u4ee5\u6211\u4eec\u53ea\u80fd\u5206\u914d\u5177\u670932\u4e2a\u5730\u5740\uff0832\u7b49\u4e8e2\u76845\u6b21\u65b9\uff09\u7a7a\u95f4\u7684\u5b50\u7f51\u3002\u8fd9\u65f6\u5b50\u7f51\u63a9\u7801\u4e3a\uff1a255.255.255.224\u3002
\u6211\u7231
255是1个字节最大保存的数值(十进制),你就记得他代表最大值的意思就行了
计算机的255即从0开始算到255，有256个，256=2的8次方；明白了吗
绛旓細255鏄鑲＄エ甯傚満涓父鐢ㄧ殑涓绉嶆殫璇紝鎸囩殑鏄滅豢鑹茶兘閲忓敖澶粹濄傝繖涓殫璇唬琛ㄤ簡鑲℃皯浠浜庢煇涓偂绁ㄧ殑鐪嬭穼淇″彿锛屾剰鍛崇潃杩欏彧鑲＄エ鐨勪环鏍煎彲鑳戒細杩呴熶笅璺岋紝鑰屾姇璧勮呭簲璇ュ強鏃跺壊鑲夊嚭灞锛屼互鍏嶄簭鎹熻繃澶с傜敱浜庤偂绁ㄥ競鍦烘尝鍔ㄨ緝澶э紝鍚勭鏆楄涔熸槸灞傚嚭涓嶇┓锛岀啛鎮夊苟鎺屾彙杩欎簺鏆楄瀵逛簬绮惧噯鎶婃彙鑲＄エ甯傚満琛屾儏闈炲父閲嶈銆傚湪鑲＄エ浜ゆ槗涓紝...
绛旓細255鏄1涓瓧鑺傛渶澶т繚瀛樼殑鏁板(鍗佽繘鍒),浣犲氨璁板緱浠栦唬琛ㄦ渶澶у肩殑鎰忔灏辫浜
绛旓細銆愬お骞虫磱姹借溅缃戙255/45/R20杞儙鐨鎰忔锛255浠ｈ〃鐨勮疆鑳庣殑鏂潰瀹藉害255姣背锛45灏辨槸杞儙鎴潰楂樺害闄や互杞儙瀹藉害鐨勭櫨鍒嗘瘮锛屾墎骞虫瘮45鐨勬剰鎬濇槸杞儙鐨勮儙澹侀珮搴︿负杞儙鏂潰瀹藉害鐨45%锛孯浠ｈ〃鐨勬槸瀛愬崍绾胯疆鑳庯紝20浠ｈ〃杞緥鐩村緞涓20鑻卞锛屽彲浠ヨ鍒20鑻卞鐨勮疆鍦堜笂銆傝疆鑳庢槸鍦ㄥ悇绉嶈溅杈嗘垨鏈烘涓婅閰嶇殑鎺ュ湴婊氬姩鐨勫渾鐜舰寮规ф鑳...
绛旓細1銆佸鏋滄槸鐢烽瀷锛岄瀷瀛愪笂鏍囩殑255鏄40.5鐮併2銆佸鏋滄槸濂抽瀷锛岄瀷瀛愪笂鏍囩殑255鏄40鐮併3銆侀瀷瀛愪笂鏍囩殑255鏄瀷瀛愬唴闀挎槸25.5鍘樼背鐨鎰忔銆4銆侀瀷瀛愬昂鐮佸鐓ц〃
绛旓細鎺╃爜閮芥槸255锛屽氨鏄鏁翠釜缃戞鍐咃紝鍙湁浣犺繖涓涓彲鐢↖P锛屼篃灏辨槸鍗曟満鍦板潃锛屼綘鐨勬槸ADSL锛岃繖绉嶆儏鍐靛緢姝ｅ父锛屽鏋滄槸鍥尯缃戠殑璇濓紝灏变笉浼氭槸杩欐牱浜嗭紝浼氭湁寰堝IP鍏变韩涓涓綉娈
绛旓細鍦ㄨ偂甯備腑锛屽父甯镐細鍑虹幇涓浜涙殫璇拰琛岃瘽锛屽叾涓竴涓父瑙佺殑鏆楄灏辨槸255銆傝繖涓殫璇寚鐨勬槸鑲′环鐭湡鍐呬笅璺岋紝浣嗗苟涓嶆剰鍛崇潃鑲＄エ鐨勪环鍊煎嚭鐜颁簡涓ラ噸鐨勯棶棰樸傝繖绉嶆儏鍐甸氬父鏄敱浜庡競鍦烘儏缁殑娉㈠姩鎴栬亴涓氭姇鏈鸿呯殑琛屼负寮曡捣鐨勭煭鏈熸尝鍔ㄣ傚湪閬囧埌杩欐牱鐨勬儏鍐垫椂锛屾姇璧勮呭簲璇ョ悊鎬у垽鏂紝涓嶈鐩茬洰璺熼殢甯傚満鎯呯华鑰屽仛鍑哄喅绛栵紝浠ュ厤閫犳垚鏃犺皳鐨...
绛旓細鍦ㄤ腑鍥界Щ鍔ㄧ殑鍙风爜鍒嗛厤鍒跺害涓紝涔濋敭鏁板瓧閿洏涓婄殑鏁板瓧2瀵瑰簲鐨勫瓧姣嶆湁鈥淎鈥濄佲淏鈥濄佲淐鈥濓紝鍥犳涓涓彿鐮佸鏋滃惈鏈9涓暟瀛2锛岄偅涔堣繖涓彿鐮佹墍鑳藉搴旂殑瀛楁瘝缁勫悎涓鍏辨湁255绉嶏紝鍥犳杩欎釜鍙风爜琚О涓轰節閿255銆傚湪鏌愪簺瀹ｄ紶涓紝涔濋敭255涔熻绉颁负鈥滄案涓嶆爮鎴濈殑鍙风爜锛屽洜涓哄畠鍑犱箮鍙互缁勫悎鍑烘墍鏈夌殑姹夊瓧鍜岃嫳鏂囧崟璇嶃傜敱浜...
绛旓細闀胯窇255閰嶉熸槸鎸囪繍鍔ㄥ憳鍦ㄩ暱璺戞瘮璧涗腑姣忓垎閽熻窇255绫崇殑閫熷害銆傚湪闀胯窇姣旇禌涓紝璺戞閫熷害鏄瀬涓哄叧閿殑鍥犵礌锛屽洜涓洪熷害鐨勪笉鍚屼細鐩存帴褰卞搷鍒版渶鍚庣殑鎴愮哗銆傝岄暱璺255閰嶉熺殑閫熷害鍦ㄩ暱璺戞瘮璧涗腑绠楁槸姣旇緝蹇殑銆傚浜庨暱璺戠埍濂借呰岃█锛屼簡瑙ｉ暱璺255閰嶉熺殑鎰忎箟闈炲父閲嶈銆傚鏋滄兂瑕佸弬鍔犻暱璺戞瘮璧涘苟涓旀兂瑕佸彇寰椾紭寮傜殑鎴愮哗锛岄偅涔堝繀椤昏鎺屾彙...
绛旓細杞﹁儙255u002F45u002FR20鎸囩殑鏄細255浠ｈ〃杞儙鐨勬柇闈㈠搴︿负255姣背锛45琛ㄧず鎵佸钩姣鎰忔鏄疆鑳庣殑鑳庡楂樺害涓鸿疆鑳庢柇闈㈠搴︾殑鐧惧垎涔45锛汻浠ｈ〃鐨勬槸瀛愬崍绾胯疆鑳庯紱20浠ｈ〃杞緥鐩村緞涓20鑻卞銆傛湁鍏宠疆鑳庣殑璧勬枡濡備笅锛1銆佹苯杞﹁疆鑳庢槸姹借溅鐨勯噸瑕侀儴浠朵箣涓瀹冪洿鎺ヤ笌璺潰鎺ヨЕ鍜屾苯杞︽偓鏋跺叡鍚屾潵缂撳拰姹借溅琛岄┒鏃舵墍鍙楀埌鐨勫啿鍑讳繚璇佹苯杞︽湁...
绛旓細锛氭垜濂冲弸鍜屾垜涔嬮棿鐨勪竴娆℃湁瓒ｇ殑瀵硅瘽 鏈杩戞垜鍜屾垜濂冲弸鍦ㄨ亰澶╂椂锛屽ス蹇界劧闂垜锛"255鏄粈涔堟剰鎬锛"鎴戜竴鏃跺崐浼氬効娌℃湁鎯虫槑鐧斤紝渚块棶浜嗗ス锛"浠涔堜笢瑗垮槥锛"濂瑰洖绛旈亾锛"鎴戠湅鍒板ソ澶氫汉鍦ㄥ井淇℃湅鍙嬪湀閲岄潰鍙戜簡涓涓暟瀛楋紝鍙湁255锛屾垜杩樹互涓鸿繖浠ｈ〃浜嗕粈涔堜笢瑗垮憿锛"涓轰簡瑙ｇ瓟濂冲弸鐨勭枒鎯...
