61.190.3.29 网络位是30 那它的子网掩码是多少还有138.1.80.6网络位是20

请详细说一下是怎么算的还有广播地址和网络号最好也说下

推荐答案推荐于2017-11-26

61.190.3.29 网络位是30那么就表示它的前30位为网络号，所以子网掩码为255.255.255.252在这个子网中只有两个可用的IP地址。把最后一段转换成二进制为00011101加粗部分连同前面的为网络号，转换成十进制为61.190.3.28既为网络号。广播地址就是把主机位全置1所以广播地址为00011111（最后一段）十进制为61.190.3.31 同理138.1.80.6网络位是20的子网掩码为255.255.240.0网络号为138.1.80.0广播地址为138.1.95.255

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其他回答

第1个回答 2013-10-20

您要划分的IP地址是：128.001.000.000 是 B 类IP地址
您要划分的子网数量是 120 个，子网掩码是：255.255.254.000
每段子网的网络号是TO前IP的最后一位减1
每段子网的广播地址是TO后IP最后一位加1
1> 128.001.0.1 TO 128.001.1.254
2> 128.001.2.1 TO 128.001.3.254
3> 128.001.4.1 TO 128.001.5.254
4> 128.001.6.1 TO 128.001.7.254
5> 128.001.8.1 TO 128.001.9.254
6> 128.001.10.1 TO 128.001.11.254
7> 128.001.12.1 TO 128.001.13.254
8> 128.001.14.1 TO 128.001.15.254
9> 128.001.16.1 TO 128.001.17.254
10> 128.001.18.1 TO 128.001.19.254
11> 128.001.20.1 TO 128.001.21.254
12> 128.001.22.1 TO 128.001.23.254
13> 128.001.24.1 TO 128.001.25.254
14> 128.001.26.1 TO 128.001.27.254
15> 128.001.28.1 TO 128.001.29.254
16> 128.001.30.1 TO 128.001.31.254
17> 128.001.32.1 TO 128.001.33.254
18> 128.001.34.1 TO 128.001.35.254
19> 128.001.36.1 TO 128.001.37.254
20> 128.001.38.1 TO 128.001.39.254
21> 128.001.40.1 TO 128.001.41.254
22> 128.001.42.1 TO 128.001.43.254
23> 128.001.44.1 TO 128.001.45.254
24> 128.001.46.1 TO 128.001.47.254
25> 128.001.48.1 TO 128.001.49.254
26> 128.001.50.1 TO 128.001.51.254
27> 128.001.52.1 TO 128.001.53.254
28> 128.001.54.1 TO 128.001.55.254
29> 128.001.56.1 TO 128.001.57.254
30> 128.001.58.1 TO 128.001.59.254
31> 128.001.60.1 TO 128.001.61.254
32> 128.001.62.1 TO 128.001.63.254
33> 128.001.64.1 TO 128.001.65.254
34> 128.001.66.1 TO 128.001.67.254
35> 128.001.68.1 TO 128.001.69.254
36> 128.001.70.1 TO 128.001.71.254
37> 128.001.72.1 TO 128.001.73.254
38> 128.001.74.1 TO 128.001.75.254
39> 128.001.76.1 TO 128.001.77.254
40> 128.001.78.1 TO 128.001.79.254
41> 128.001.80.1 TO 128.001.81.254
42> 128.001.82.1 TO 128.001.83.254
43> 128.001.84.1 TO 128.001.85.254
44> 128.001.86.1 TO 128.001.87.254
45> 128.001.88.1 TO 128.001.89.254
46> 128.001.90.1 TO 128.001.91.254
47> 128.001.92.1 TO 128.001.93.254
48> 128.001.94.1 TO 128.001.95.254
49> 128.001.96.1 TO 128.001.97.254
50> 128.001.98.1 TO 128.001.99.254
51> 128.001.100.1 TO 128.001.101.254
52> 128.001.102.1 TO 128.001.103.254
53> 128.001.104.1 TO 128.001.105.254
54> 128.001.106.1 TO 128.001.107.254
55> 128.001.108.1 TO 128.001.109.254
56> 128.001.110.1 TO 128.001.111.254
57> 128.001.112.1 TO 128.001.113.254
58> 128.001.114.1 TO 128.001.115.254
59> 128.001.116.1 TO 128.001.117.254
60> 128.001.118.1 TO 128.001.119.254
61> 128.001.120.1 TO 128.001.121.254
62> 128.001.122.1 TO 128.001.123.254
63> 128.001.124.1 TO 128.001.125.254
64> 128.001.126.1 TO 128.001.127.254
65> 128.001.128.1 TO 128.001.129.254
66> 128.001.130.1 TO 128.001.131.254
67> 128.001.132.1 TO 128.001.133.254
68> 128.001.134.1 TO 128.001.135.254
69> 128.001.136.1 TO 128.001.137.254
70> 128.001.138.1 TO 128.001.139.254
71> 128.001.140.1 TO 128.001.141.254
72> 128.001.142.1 TO 128.001.143.254
73> 128.001.144.1 TO 128.001.145.254
74> 128.001.146.1 TO 128.001.147.254
75> 128.001.148.1 TO 128.001.149.254
76> 128.001.150.1 TO 128.001.151.254
77> 128.001.152.1 TO 128.001.153.254
78> 128.001.154.1 TO 128.001.155.254
79> 128.001.156.1 TO 128.001.157.254
80> 128.001.158.1 TO 128.001.159.254
81> 128.001.160.1 TO 128.001.161.254
82> 128.001.162.1 TO 128.001.163.254
83> 128.001.164.1 TO 128.001.165.254
84> 128.001.166.1 TO 128.001.167.254
85> 128.001.168.1 TO 128.001.169.254
86> 128.001.170.1 TO 128.001.171.254
87> 128.001.172.1 TO 128.001.173.254
88> 128.001.174.1 TO 128.001.175.254
89> 128.001.176.1 TO 128.001.177.254
90> 128.001.178.1 TO 128.001.179.254
91> 128.001.180.1 TO 128.001.181.254
92> 128.001.182.1 TO 128.001.183.254
93> 128.001.184.1 TO 128.001.185.254
94> 128.001.186.1 TO 128.001.187.254
95> 128.001.188.1 TO 128.001.189.254
96> 128.001.190.1 TO 128.001.191.254
97> 128.001.192.1 TO 128.001.193.254
98> 128.001.194.1 TO 128.001.195.254
99> 128.001.196.1 TO 128.001.197.254
100> 128.001.198.1 TO 128.001.199.254
101> 128.001.200.1 TO 128.001.201.254
102> 128.001.202.1 TO 128.001.203.254
103> 128.001.204.1 TO 128.001.205.254
104> 128.001.206.1 TO 128.001.207.254
105> 128.001.208.1 TO 128.001.209.254
106> 128.001.210.1 TO 128.001.211.254
107> 128.001.212.1 TO 128.001.213.254
108> 128.001.214.1 TO 128.001.215.254
109> 128.001.216.1 TO 128.001.217.254
110> 128.001.218.1 TO 128.001.219.254
111> 128.001.220.1 TO 128.001.221.254
112> 128.001.222.1 TO 128.001.223.254
113> 128.001.224.1 TO 128.001.225.254
114> 128.001.226.1 TO 128.001.227.254
115> 128.001.228.1 TO 128.001.229.254
116> 128.001.230.1 TO 128.001.231.254
117> 128.001.232.1 TO 128.001.233.254
118> 128.001.234.1 TO 128.001.235.254
119> 128.001.236.1 TO 128.001.237.254
120> 128.001.238.1 TO 128.001.239.254
121> 128.001.240.1 TO 128.001.241.254
122> 128.001.242.1 TO 128.001.243.254
123> 128.001.244.1 TO 128.001.245.254
124> 128.001.246.1 TO 128.001.247.254
125> 128.001.248.1 TO 128.001.249.254
126> 128.001.250.1 TO 128.001.251.254
127> 128.001.252.1 TO 128.001.253.254
128> 128.001.254.1 TO 128.001.255.254

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...那它的子网掩码是多少 还有138.1.80.6网络位是20答：广播地址就是把主机位全置1所以广播地址为00011111（最后一段）十进制为61.190.3.31 同理138.1.80.6网络位是20的子网掩码为255.255.240.0网络号为138.1.80.0广播地址为138.1.95.255

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61.190.3.29 网络位是30 那它的子网掩码是多少 还有138.1.80.6网络位是20

61.190.3.29 网络位是30 那它的子网掩码是多少还有138.1.80.6网络位是20