.

Hereof, what is the difference between Classful addressing and classless addressing in IPv4?

Both terms refer to a perspective on the structure of asubnetted IP address. Classless addressing uses atwo-part view of IP addresses, and classful addressing has athree-part view. With classful addressing, theaddress always has an 8-, 16-, or 24-bit network field,based on the Class A, B, and C addressingrules.

Secondly, why we use classless IP addressing? Classless Internet addressing. Therefore,in the early 1990s, the Internet moved away from a classfuladdress space to a classless address space. In otherwords, the number of bits used for the network portion of anIP address became variable instead of fixed. The networkportion of classful IP addresses is fixed.

Also to know, what is a mask in IPv4 addressing?

It is called a subnet mask because it is used toidentify network address of an IP address by perfoming a bitwiseAND operation on the netmask. A Subnet mask is a 32-bitnumber that masks an IP address, and divides the IP addressinto network address and host address.

What classless addressing?

Classless Addressing is an improved IPAddressing system. It makes the allocation of IPAddresses more efficient. It replaces the older classfuladdressing system based on classes. It is also known asClassless Inter Domain Routing (CIDR).