Question

131.107.89
3.3.57.0
200.200.5.2
191.107.2.10
127.0.0.1
Which address class (es) will allow you to have more than 1000 hosts per network?
Which address (es) will allow only 254 hosts per network?

Answer 1

IP Address:

An IP address is an identifier or label used to identify a machine on the internet or a particular network. Each of the devices on the internet must have an IP address for identification.

IPv4 is the first version of Internet Protocol that uses a 32-bit address and this protocol is most widely used.

The netmask and subnet mask is used to divide the IP address as given below:

The netmask is a sequence of '1' followed by a sequence of '0' and it is used to divide an IP address into multiple subnets.

Classful Addressing:

In classful addressing, an IP address is related to a class and we need to purchase a class of the IP addresses as per the requirement.

Class A:

The range of the first octet: 0 to 127

Subnet mask = 255.0.0.0

Class B:

First octet range: 128 to 191
Subnet mask = 255.255.0.0

Class C:

First octet range: 192 to 223

Subnet mask = 255.255.255.0

To have more than 1000 hosts per network we need at least 10 bits for host address because by using 10 bits we can use 2¹⁰ = 1024 IP addresses.

The addresses belong to class A and class B only allow to have more than 1000 host.

So, the below IP addresses allow you to have more than 1000 hosts per network :

• 131.107.89
• 3.3.57.0
• 191.107.2.10
• 127.0.0.1

The address belongs to class C allow only 254 hosts per address because there are only 8 bits for host id. By using 8 bits we can use 2⁸ + 1= 256 IP addresses.

But the first and the last IP addresses are used for a special purpose.

So, total number of host addresses are = 256 - 2 = 254.

The address belongs to class C is:

200.200.5.2

So, the above address will allow only 254 hosts per network.