16 bits per block
To find a subnet on a Windows machine, open the Command Prompt by typing "cmd" in the search bar and pressing Enter. Then, type the command ipconfig and press Enter. Look for the "IPv4 Address" and "Subnet Mask" under your active network connection; the subnet can be derived from these two values. For example, if your IPv4 Address is 192.168.1.10 and the Subnet Mask is 255.255.255.0, your subnet is 192.168.1.0/24.
Since this is a class C address the subnet mask for the default would be 255.255.255.0. Other values could be:255.255.255.128 - 255.255.255.252
16 bits per block
This is a class C address, so the network number is 209.165.200.0, and the default subnet mask is 255.255.255.0
The function of a subnet mask is to extract the network ID portion of an IP destination address and determine whether an IP address exists on the local network or whether it must be routed outside the local network
The network number is 209.165.200.0 and the default subnet mask is 255.255.255.0 for a class C network.
A network ID refers to a part of a TCP/IP address that is used to identify the subnet that a host may be on. The subnet that the computer is on is determined by the netmask and IP address of the computer. This subnet address is the same as the network ID and is the beginning part of the computers IP address. When the netmask is setup, it is a number where some of the most significant bits have a 1's value and the rest have values of 0. The most significant part of the netmask with bits set to 1's specifies the network address, and the lower part of the address will specify the host address. The part of the IP address that matches the part of the netmask where the bits are set to ones determines the network ID.
Calculating a subnet mask depends on whether you are using the default, classful mask or a true subnet mask to divide a network into smaller pieces.The defaults are on octet boundaries (every 8 bits):255.0.0.0 class A network255.255.0.0 class B network255.255.255.0 class C networkAny other type of subnet mask with 4 octets (iPV4) can use combinations of those with any octet value from 0 - 255. No number may be larger than 255.Calculating other subnet masks would be based on how many subnets you want in the network. You could have values such as:255.192.0.0255.255.248.0.0255.255.255.252The first octet must at least be 255. The other octets may change, based on whether it is a classful default network or it is being subnetted.
Calculating a subnet mask depends on whether you are using the default, classful mask or a true subnet mask to divide a network into smaller pieces.The defaults are on octet boundaries (every 8 bits):255.0.0.0 class A network255.255.0.0 class B network255.255.255.0 class C networkAny other type of subnet mask with 4 octets (iPV4) can use combinations of those with any octet value from 0 - 255. No number may be larger than 255.Calculating other subnet masks would be based on how many subnets you want in the network. You could have values such as:255.192.0.0255.255.248.0.0255.255.255.252The first octet must at least be 255. The other octets may change, based on whether it is a classful default network or it is being subnetted.
Calculating a subnet mask depends on whether you are using the default, classful mask or a true subnet mask to divide a network into smaller pieces.The defaults are on octet boundaries (every 8 bits):255.0.0.0 class A network255.255.0.0 class B network255.255.255.0 class C networkAny other type of subnet mask with 4 octets (iPV4) can use combinations of those with any octet value from 0 - 255. No number may be larger than 255.Calculating other subnet masks would be based on how many subnets you want in the network. You could have values such as:255.192.0.0255.255.248.0.0255.255.255.252The first octet must at least be 255. The other octets may change, based on whether it is a classful default network or it is being subnetted.
Check out this website it has the IP and Subnet mask broken down by subnets and addtional host. http://www.oceanwave.com/technical-resources/network-admin/ip.html 2046 http://www.oceanwave.com/technical-resources/network-admin/ip.html
Subnet masks that use either all ones or all zeroes in an octet are called classful subnet masks. 255.255.255.0 (11111111.11111111.11111111.00000000), 255.255.0.0 (11111111.11111111.00000000.00000000), 255.0.0.0 (11111111.00000000.00000000.00000000)