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In the IPv4 IP address space, there are five classes: A, B, C, D and E. Each class has a specific range of IP addresses (and ultimately dictates the number of devices you can have on your network). Primarily, class A, B, and C are used by the majority of devices on the Internet.
Classful IP addressing is a way of organizing and managing IP addresses, which are used to identify devices on a network. Think of IP addresses like street addresses for houses; each device on a network needs its unique address to communicate with other devices. In this article, we will discuss Classful IP addresses, and their types in detail.
This tutorial explains IP address classes in detail through examples. Learn how IP addresses are organized in IP classes and how to identify the class of an IP address.
IP address classes. IPv4 addresses divide into five classes. The primary difference between the first three classes -- Class A, Class B and Class C -- is the number of subnets versus the number of hosts per subnet. The following table outlines the details between IP address classes.
IP Address Classes defines five separate classes based on four address bits: Class A, Class B, Class C, Class D, and Class E. Let’s see each of the IP Address Classes in detail through examples.
IPv4 address classes categorize IP addresses into groups based on their leading bits. There are five classes: A, B, C, D, and E. Class A has a broad address range for large networks, Class B suits medium-sized networks, and Class C is for smaller networks.
There are classes of IPv4 addresses: Class A, B, C, D, E. Each one is designed with a specific IP address that determines the capacity of devices on a network. Class A is designed for large networks (i.e., organizations). It ranges from 0 to 127.
The address classes divide the address space into addresses that support: Large numbers of nodes – Intended for a large organisation – Class A addresses. Medium number of nodes- Class B addresses. Small number of nodes- Intended for a small organisation – Class C addresses.
TCP/IP defines five classes of IP addresses: class A, B, C, D, and E. Each class has a range of valid IP addresses. The value of the first octet determines the class. IP addresses from the first three classes (A, B and C) can be used for host addresses.
This was last updated in October 2020. This definition explains what IPv4 address classes are and their purpose in IPv4 routing. Learn about Class A,B,C,D and E IP addresses as well as Classless Inter-Domain Routing (CIDR) addressing.