172.22.56.0/22

172.22.56.0/22

56对应的二进制是00111000,

16+6=22。所以第三个byte的后面2位bit可以使用。

 

The IP address and subnet mask you provided, 172.22.56.0/22, indicate a specific range of IP addresses within a private network. Here’s a detailed breakdown:

IP Address: 172.22.56.0

This is part of the private IP address range 172.16.0.0 - 172.31.255.255, which is reserved for private network use.

Subnet Mask: /22

The /22 indicates that the first 22 bits of the IP address are used for the network portion, and the remaining bits are used for host addresses.

Subnet Calculation:

1. Binary Representation:

   • The subnet mask /22 in binary is: 11111111.11111111.11111100.00000000
   • This translates to a subnet mask of 255.255.252.0.

2. Network Address:

   • The network address is the first address in the subnet: 172.22.56.0.

3. Broadcast Address:

   • The broadcast address is the last address in the subnet. To find it, we set all host bits to 1 within the subnet: 172.22.59.255.

4. Usable IP Range:

   • The usable IP addresses are those between the network address and the broadcast address, excluding them.
   • Therefore, the usable range is from 172.22.56.1 to 172.22.59.254.

5. Total Usable Hosts:

   • There are 1024 total addresses in a /22 subnet (2^(32-22) = 2^10 = 1024).
   • Since 2 addresses are reserved (network and broadcast), there are 1022 usable IP addresses.

Summary

• Network Address: 172.22.56.0
• Broadcast Address: 172.22.59.255
• Usable IP Range: 172.22.56.1 to 172.22.59.254
• Total Usable Hosts: 1022

This subnet provides a large range of IP addresses, which is useful for accommodating a significant number of devices within a private network.

广播地址是网络地址中网络部分不变，主机部分全部设置为1的地址。

网络地址是172.22.56.0 二进制是10101100，00010110，00111000，00000000

针对这个例子，网络地址设置为1的话，也就是前面22位不变，把后面10位设置为1，得到

10101100，00010110，00111011，11111111 也就是172.22.59.255

 

 

172.22.56.0/24

The IP address and subnet mask you provided, 172.22.56.0/24, specify a particular range of IP addresses within a private network. Here’s a detailed breakdown:

IP Address: 172.22.56.0

This is part of the private IP address range 172.16.0.0 - 172.31.255.255, which is reserved for private network use.

Subnet Mask: /24

The /24 indicates that the first 24 bits of the IP address are used for the network portion, and the remaining 8 bits are used for host addresses.

Subnet Calculation:

1. Binary Representation:

   • The subnet mask /24 in binary is: 11111111.11111111.11111111.00000000
   • This translates to a subnet mask of 255.255.255.0.

2. Network Address:

   • The network address is the first address in the subnet: 172.22.56.0.

3. Broadcast Address:

   • The broadcast address is the last address in the subnet. To find it, we set all host bits to 1 within the subnet: 172.22.56.255.

4. Usable IP Range:

   • The usable IP addresses are those between the network address and the broadcast address, excluding them.
   • Therefore, the usable range is from 172.22.56.1 to 172.22.56.254.

5. Total Usable Hosts:

   • There are 256 total addresses in a /24 subnet (2^(32-24) = 2^8 = 256).
   • Since 2 addresses are reserved (network and broadcast), there are 254 usable IP addresses.

Summary

• Network Address: 172.22.56.0
• Broadcast Address: 172.22.56.255
• Usable IP Range: 172.22.56.1 to 172.22.56.254
• Total Usable Hosts: 254

This /24 subnet provides a common subnet size that can accommodate up to 254 devices within a private network, making it a widely used subnet size for small to medium-sized networks.

 

作者:Chuck Lu    GitHub