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## What are the minimum host bits needed if the network has 20 hosts?

So back to answer our initial question of the minimum subnet size to accommodate 20 hosts, the minimum number of host bits required is **5 bits** (2^5 = 32).

## How many host bits are in a 24?

Number of bits for Class C networks — 24 bit mask = **255.255.** **255.0**, 32 bit mask = 255.255. 255.255. USABLE SUBNETS AND ADDRESSES The top and bottom host numbers of any subnet may not be used.

## What are the minimum host bits needed if the network has 40 devices?

In this example, since we need 40 addresses per network and we can allot addresses in powers of 2 (2, 4, 8, 16, 32, 64, 128, 256, and so on), the minimum number of addresses that would fulfil the requirement of 40 addresses is 64, which requires **6 bits** for the hosts.

## How many networks does 25 have?

For Class B Networks

network | network mask | networks |
---|---|---|

/count | ||

25 | 255.255.255.128 | 512 |

26 | 255.255.255.192 | 1024 |

27 | 255.255.255.224 | 2048 |

## How do you calculate the number of hosts in a network?

**The formula for determining the number of hosts a network supports is 2 ^{n}-2, where n is the number of bits used for the host.**

- 2
^{n}-2 is sometimes expressed as (2^n) – 2. Both indicate 2 raised to the power of n. - You subtract two to reserve one IP for the network ID and one for the broadcast address.

## What are the minimum host bits needed if the network has 30 hosts?

If you look at the design requirement of 30 hosts per network, you will discover that I only need **5 bits** in the host ID portion of a Class C network to satisfy my requirement. By borrowing 3 bits, I can create 8 subnets: 192.168.

## How many individual addresses are there on a 22 network?

Class D

CIDR Block | Supernet Mask | Number of Class C Addresses |
---|---|---|

/20 | 255.255.240.0 | 16 |

/21 | 255.255.248.0 | 8 |

/22 | 255.255.252.0 |
4 |

/23 | 255.255.254.0 | 2 |

## How many bits are needed to represent 200 hosts?

Similarly, because you need up to 200 hosts per subnet, you need **8 host bits**.

## How many usable IP addresses are available in a 25 network?

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

CIDR | Subnet mask | # of usable IP addresses |
---|---|---|

/25 | 255.255.255.128 | 126 |

/24 | 255.255.255.0 | 254 |

/23 | 255.255.254.0 | 510 |

/22 | 255.255.252.0 | 1,022 |

## What does IP 24 mean?

2.0/24”, the number “24” refers **to how many bits are contained in the network**. From this, the number of bits left for address space can be calculated. As all IPv4 networks have 32 bits, and each “section” of the address denoted by the decimal points contains eight bits, “192.0.