Class B IP address
Class B IP address
A Class B IP address is a 32-bit IPv4 address that is assigned to a network with up to 65,534 hosts, and it is commonly used for large organizations or institutions. Class B IP addresses are typically represented in the format of XXX.XXX.0.0 to XXX.XXX.255.255.
What does Class B IP address mean?
An IP address (Internet Protocol address) is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. An IP address serves two primary functions: host or network interface identification and location addressing.
Classful networks, a historical method of IP address assignment, categorize IP addresses into five classes: A, B, C, D, and E. These classes were based on the initial bits of the IP address and determined the Number of network and host bits.
Class B IP addresses are a range of IP addresses that Start with the binary sequence 10, followed by a variable number of 0s and 1s. In decimal notation, Class B IP addresses fall within the range of 128.0.0.0 to 191.255.255.255.
Class B IP addresses have a 16-bit network portion and a 16-bit host portion. This structure allows for a maximum of 16,384 possible networks and 65,536 hosts per network.
Applications
Class B IP addresses were initially designed for medium-sized organizations and networks, such AS universities, corporations, and government agencies. However, with the growth of the internet and the increasing demand for IP addresses, Class B addresses have become less common.
Today, Class B IP addresses are still used in some legacy systems and in organizations that require a large number of IP addresses for internal network segmentation.
History
The Classful network addressing system was developed in the early days of the internet to manage the limited number of available IP addresses. However, as the internet grew and the demand for IP addresses increased, the Classful system became inefficient and was eventually replaced by Classless Inter-Domain Routing (CIDR).
CIDR allows for more efficient use of IP addresses by enabling networks to be assigned varying-length prefixes, regardless of class. This flexibility has led to a gradual decline in the use of Class B IP addresses.
Despite being less common today, Class B IP addresses remain an important part of the history of IP addressing and continue to be used in some niche applications.