How to calculate the subnet mask of an ip address?

  1. In the Windows search fields, type cmd, to open command prompt.
  2. Press Enter.
  3. Type ipconfig/all press Enter.
  4. Find your network settings.
  5. Your PC’s IP address and your network Subnet Mask and Gateway will be listed.

Also know, what is subnet mask for IP address? A subnet mask is a 32- or 128-bit number that segments an existing IP address in a TCP/IP network. It is used by the TCP/IP protocol to determine whether a host is on the local subnet or on a remote network.

Similarly, how do you calculate the number of subnets? To calculate the number of possible subnets, use the formula 2n, where n equals the number of host bits borrowed. For example, if three host bits are borrowed, then n=3. 23 = 8, so eight subnets are possible if three host bits are borrowed.

Furthermore, how do I find my subnet mask and network ID and host ID? A subnet mask is 32 bits numbers in which the series of 1’s represents the Network ID part and the Subnet ID part whereas the series of 0’s represents the Host ID part. So, in the above example of the Class C IP address, we represent all the network ID bits by 1.

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Subsequently, how do you calculate subnet prefix? In IPv4, the prefix (or network portion) of the address can be identified by a dotted-decimal netmask, commonly referred to as a subnet mask. For example, 255.255. 255.0 indicates that the network portion, or prefix length, of the IPv4 address is the leftmost 24 bits.

What is subnet mask example?

Example: A class C network would have a subnet mask of 255.255. 255.0 which means that 24 bits are used for the network. In CIDR notation this is designated by a /24 following the IP address.

Is subnet mask always 255?

All subnet masks must end in 0, 128, 192, 224, 240, 248, 252, 254, or 255—the values of each bit position as they are “turned on” left to right in any octet. … 0.0 is a valid subnet mask, as is 255.255. 248.0 and 255.255. 255.252.

How do subnet masks work?

A subnet mask is a 32-bit number created by setting host bits to all 0s and setting network bits to all 1s. In this way, the subnet mask separates the IP address into the network and host addresses. The “255” address is always assigned to a broadcast address, and the “0” address is always assigned to a network address.

What is the subnet address?

Subnet addressing allows an autonomous system made up of multiple networks to share the same Internet address. The subnetwork capability of TCP/IP also makes it possible to divide a single network into multiple logical networks (subnets).

Is subnet mask and subnet ID same?

0.0 network being used as a Subnet ID. A subnet mask is used to identify the part of the address that should be used as the Subnet ID. The subnet mask is applied to the full network address using a binary AND operation.

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Is IP address in subnet?

A subnet mask is used to divide an IP address into two parts. One part identifies the host (computer), the other part identifies the network to which it belongs. To better understand how IP addresses and subnet masks work, look at an IP address and see how it’s organized.

How do I find my custom subnet mask for Class B?

  1. 2-2=14 subnets.
  2. 2-2=4094 hosts per subnet.
  3. 256-240=16.0, 32.0, 48.0, 64.0, etc.
  4. Broadcast for the 16.0 subnet is 31.255. Broadcast for the 32.0 subnet is 47.255, etc.
  5. The valid hosts are:

What is subnet mask prefix length?

The prefix length determines the size of the subnet and is the number of 1 bits in the netmask. With variable-length subnetting, the prefix length does not have to be a multiple of 8. For example, you can have the IP address 192.168. 123.224, with a netmask = 255.255.

What is a 28 subnet mask?

/28 — 16 Subnets — 14 Hosts/Subnet. Network # IP Range. Broadcast. .0.

What is a 255.255 255.0 subnet?

A subnet mask of 255.255. 255.0 allows for close to 256 unique hosts within the network (since not all 256 IP addresses can be used). … This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256). The largest Class A networks use a subnet mask of 255.0.

What is a 255.255 254.0 subnet?

255.255.254.0 = 1 bit less than 24 bits mask, so (256 x 2) – 2 hosts = 510. And to know if an ip address is good or not regarding a certain subnet..i do the following: Is 192.168. 1.64 – 255.255.

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How many Subnet Masks are there?

The three default subnet masks are 255.0. 0.0 for Class A, 255.255. 0.0 for class B, and 255.255. 255.0 for Class C.

What is subnet mask for dummies?

A subnet mask defines which chunk of an IP address is the host ID and which portion is the subnet network ID. … A subnet mask works like a filter with the mask identifying the IP address bits that represent the network ID with a 1, and the bits that represent the host ID with a 0.

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