# What is the subnet mask for 27?

## What is the subnet mask for 27?

255.255.255.224

/ 30 4 255.255.255.252
/ 29 8 255.255.255.248
/ 28 16 255.255.255.240
/ 27 32 255.255.255.224

How many bits does a mask have?

32-bit
A subnet mask determines which parts of the IP address are network and host identifiers. It is a 32-bit number that distinguishes each octet in the IP address. For example, as depicted in Table 4.9, 255.255.

What is a 24 bit mask?

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.

### What is a 30 bit mask?

As you know a /24 bit subnet mask has 254 usable IP addresses + 1 for the broadcast + 1 for the network. This is calculated 2^8 (or 2 to the 8th power) = 256 – 2 = 254. So what is a /30 bit mask? A /30 bit mask would be 30 one’s, leaving just 2 zero’s that could be used for host addressing.

How many usable IPS are in a 27?

Subnet Cheat Sheet – 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References

/27 255.255.255.224 30
/26 255.255.255.192 62
/25 255.255.255.128 126
/24 255.255.255.0 254

How many IPS is a 26?

A “/26” network provides 64 IPv4 addresses.

## How do I know what bit my mask is?

Calculate the subnet bits by looking at the final 8-bit binary word of the 32-bit binary subnet mask. If the final 8-bit binary word is 10000000, then there is one subnet bit and therefore 25 mask bits. If it is 11000000, then there are two subnet bits and therefore 26 mask bits.

How many networks does 25 have?

For Class B Networks

/count
25 255.255.255.128 512
26 255.255.255.192 1024
27 255.255.255.224 2048

What does 26 mean in IP address?

64
A “/26” network provides 64 IPv4 addresses. The lower the number after the oblique, the more addresses contained in that “block”.

### What does IP address 27 mean?

/27 denote that 27 of the 32 bits of the address are the netmask hence only 5 bits are available to differentiate the computers. However, you always lose 2 addresses for broadcast and loopback, so the result is: 2^(32–27) — 2 = 2⁵ -2 = 32–2 =30. We have only 30 usable addresses on /27 allocations.

What does 28 mean in IP address?

Answer: 28 is a subnet mask. IP address has 32 bits in total. 28 denotes network ID while rest of the bits (which are 4 bits) are used for hosts.