# Question: How Many Subnets Are In A 24?

## What does it mean 192.168 0.0 24?

192.168.0.0 Refers to the IP adress /24 refers to the subnet.

/ 24 subnet is 255.255.255.0.

192.168.0.0/24 is common for home networks..

## What does 25 mean in IP address?

/25 is the CIDR notation, which indicates a subnet mask of 255.255.255.128. So, this means that 10.15.92.0/25 represents the network “10.15.92.0” with a subnet mask of 255.255.255.128. The IP address range is from 10.15.92.1 to 10.15.92.126. The network ID is 10.15.92.0. The broadcast IP is 10.15.92.127.

## What does 21 mean in IP address?

It’s CIDR notation for a subnet. The /21 denotes that the first (most-significant) 21 bits are common to all addresses in the subnet. The individual hosts in the network have addresses that are different only in the last 11 bits.

## When should you use a static IP address?

When static IPs are needed Static IP addresses normally matter more when external devices or websites need to remember your IP address. One example is VPN or other remote access solutions that trust (whitelists) certain IPs for security purposes.

## How many IP’s are in a 24?

CIDR, Subnet Masks, and Usable IP Addresses Quick Reference Guide (Cheat Sheet)CIDRSubnet MaskTotal IPs/27255.255.255.22432/26255.255.255.19264/25255.255.255.128128/24255.255.255.025629 more rows•Aug 26, 2011

## What does 29 mean in IP address?

To explain what it actually is: /29 means that 29 of the 32 bits of the address are the netmask, therefore, only 3 bits are available for differentiating between computers. However, you always lose 2 addresses from the block for broadcast and loopback, so your result is: 2**(32-29) – 2 = 2**3 – 2 = 8 – 2 = 6.

## How do you calculate CIDR subnet?

CIDR Available Networks (subnetting)Subtract the network bits from 32. /17 = 32-17 and /21 = 32-21.Raise 2 to that power. 232-17 and 232-21.Divide the larger network by the smaller one. 232-17 / 232-21 = 215 / 211 = 215-11 = 24 = 16.

## 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.

## How many 20 subnets are in a 16?

Network BitsSubnet MaskNumber of Subnets/20255.255.240.016 (14)/21255.255.248.032 (30)/22255.255.252.064 (62)/23255.255.254.0128 (126)11 more rows•Aug 16, 2003

## Why is 192.168 always used?

Long story short, we are using 192.168. X.X IP addresses because this is best practice. The IETF has created three IP ranges for private networks, with Class C being the smallest and easiest to control and maintain. This is why most routers use exactly this IP range.

## How do you calculate the number of subnets?

The number of subnets is found by counting the number of bits by which the initial mask was extended, also known as the subnet bits. Our initial address allocation was 192.168. 0.0 with a mask of 255.255. 0.0.

## What does 192.168 mean?

1.1 – Computer Definition. The common default IP address of a router. Although it can be changed to another private IP addressing space, most of the time, the 192.168 range is used, and the default router address is left as is. See private IP address.

## What is a 192.168 IP address?

192.168. 1.1 is a common factory IP address for a consumer-grade router. If the router is used for connecting to the Internet then all computers and devices which access the Internet through it will use this address as their default gateway.

## What does 28 mean in IP address?

It’s a subnet mask. IP address has 4 octets of 8 bits each and 32 bits in total. 28 means, first 28 bits denote network ID while 4 bits are used for hosts or they identify the hosts.

## What is a 24 subnet?

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.

## How many usable hosts are on a 24 subnet?

For Class C Networksnetworknetwork maskhosts/countpossible24255.255.255.025625255.255.255.12812826255.255.255.192644 more rows•Mar 2, 2010