# What is the subnet mask of a class B network?

## What is the subnet mask of a class B network?

255.255.0.0
Class B networks use a default subnet mask of 255.255. 0.0 and have 128-191 as their first octet.

## How do you subnet a Class A network?

Valid subnet address: To figure out the valid subnet address, simply subtract the subnet mask from 256. For example, if you had a Class A mask of 255.240. 0.0, the equation would be 256-240=16….128.0 subnet:

1. Subnet: 10.0. 128.0.
2. Broadcast: 10.0. 255.255.
3. Valid host range: 10.0. 128.1 through 10.0. 255.254.

How many networks are in a class B?

Class Leading bits Number of networks
Class A 0 128 (27)
Class B 10 16,384 (214)
Class C 110 2,097,152 (221)
Class D (multicast) 1110 not defined

What is a class B network?

A class B network is a type of network in the now-defunct classful networking architecture. Class B networks have IP addresses between 128.0. 0.0 and 191.255. 255.255. The Classful networking system has been superseded by CIDR (Classless Inter-Domain Routing) since 1993.

### What is a Class A subnet?

A Class A IP address reserves 8 bits for a network with 24 bits dedicated to hosts. Its IP address spans from 0 to 126. The Class A subnet mask is 255.0. 0.0. Accordingly, Class A IP addresses are best used to serve incredibly large networks.

### What is a Class B IP address?

Class B IP addresses are used for medium and large-sized networks in enterprises and organizations. They support up to 65,000 hosts on 16,000 individual networks. Class C addresses are most common and used in small business and home networks. These support up to 256 hosts on each of 2 million networks.

How do you calculate the number of hosts in Class B?

With those two addresses always reserved, the total number of assignable hosts for a class B network is 216 – 2 = 65,534. The total number of networks a class address may have is calculated by subtracting the number of bits in the subnet mask from the number of bits used to determine which class of network it is.

What is class B address used for?

#### What is class B private address?

Class B: 172.16. 0.0 to 172.31. 255.255.

#### What is the subnet mask for Class B?

Class B networks use a default subnet mask of 255.255.0.0 and have 128-191 as their first octet. The address 172.16.52.63 is a class B address. Its first octet is 172, which is between 128 and 191, inclusive. Class C networks use a default subnet mask of 255.255.255.0 and have 192-223 as their first octet.

What is Class B in networking?

A Class B network was a network in which all addresses had the two most-significant bits set to 1 and 0 respectively. For these networks, the network address was given by the next 14 bits of the address, thus leaving 16 bits for numbering host on the network for a total of 65 536 addresses per network.

What is a private Class B network?

The Private Class B range of IP addresses fall into 16 subnets. These were provided so that an organization could have up to 65,534 hosts on a network and have up to 16 networks. The Private Class C range of IP addresses is designed to support 254 networks of up to 65,534 hosts.

## What is the default subnet mask?

The subnet Masks indicate which portion of an IP address denotes the network and which portion denotes the host. The subnet mask for class C IP addresses is 255.255.255.0 and is the default subnet mask for many computers and network routers. 