## What does 24 mean on subnet?

hello Allan49, the /24 is referring to the subnet mask. / 24 indicates that the first 24 bits of the address are masked (255.255.255.0). a /16 would translate into 255.255.0.0.

## What is the magic number for a 26 network?

255.255.255.224 /27 27
255.255.255.192 /26 26
255.255.255.128 /25 25
255.255.255.0 /24 24

## How many subnets is 25?

IPv6 Subnet Calculator

Prefix size Network mask Usable hosts per subnet
/24 255.255.255.0 254
/25 255.255.255.128 126
/26 255.255.255.192 62
/27 255.255.255.224 30

## What is the magic number used for faster subnet interval identification?

The magic number is simple the difference of the interesting octet value and 256.

## What is subnet mask for beginners?

A subnet mask doesn’t represent any device or network on the Internet. It’s just a way of indicating which portion of an IP address should be used to determine the network ID. (You can spot a subnet mask right away because the first octet is always 255, and 255 is not a valid first octet for any class of IP address.)

## How many 20 subnets are in a 16?

Network Bits Subnet Mask Number of Subnets
/20 255.255.240.0 16 (14)
/21 255.255.248.0 32 (30)
/22 255.255.252.0 64 (62)
/23 255.255.254.0 128 (126)

## How many bits is Class A IP?

A class A network number uses the first eight bits of the IP address as its “network part.” The remaining 24 bits comprise the host part of the IP address, as illustrated in Figure 3-2 below.

## What is the difference between a Classful and classless subnet mask?

Classless addressing uses a two-part view of IP addresses, and classful addressing has a three-part view. With classless addressing, the network and subnet parts from the classful view are combined into a single part, often called the subnet or prefix, with the address ending in the host part.

## How to find the magic number for subnetting?

In this case with a subnet mask of a 255.255.255.240the number that we take is “240”, to get the magic number we must always subtract the subnet mask by “256”. *256 –240 = 16, now that we have our magic number of 16 we can now find the solution to our objective! I) What Network does the above IP address belong to? a.

## How to find the subnet number of an IP address?

For any octets fully to the right of the interesting column, put 0s in the subnet number. Now the tricky part, find a ‘magic number’ which is 256 minus mask’s interesting octet. In this example, it is 256 – 252 = 4. Find the multiple of the magic number that is closest to, but not greater than the the interesting octet of original IP address.

## Is there an IP subnet mask calculator?

IP Subnet Calculator. This calculator returns a variety of information regarding Internet Protocol version 4 (IPv4) and IPv6 subnets including possible network addresses, usable host ranges, subnet mask, and IP class, among others.

## How do you find the magic number for an IP address?

Now the tricky part, find a ‘magic number’ which is 256 minus mask’s interesting octet. In this example, it is 256 – 252 = 4. Find the multiple of the magic number that is closest to, but not greater than the the interesting octet of original IP address.