Use IP Address Space In a computer network internet protocol is used for communication, to each device such as printers and computers a numerical label called an IP (Internet Protocol) Address is assigned. There are two functions of an IP Address a host or network interface identification, and also provides a location addressing. The basic elements of a network are the IP Address and Subnet Mask. There is also switching and routing which after you connect devices to switches and routers, data packets can be moved across the network. The Internet Protocol Version 4 (known as IPv4) is a protocol highly used even today, this IP Address consist of a 32-bit number in decimal or binary in four parts. In 1995 Internet Protocol Version 6 (known as IPv6) was created due to a high growth of the Internet, and the reduction of available IP addresses. IPv6 consist of a 128-bit number for addresses, in 1998 IPv6 was standardized as RFC 2460 and since the mid-2000’s has been used. Stored in text files and displayed as a readable notation IP Addresses are started as binary numbers, before their put out in readable form for individuals. Subnet short for Sub-network was not present in 1969 the classes of A – E did not exist yet.
There were only 254 distinct networks with each network having a max of 16,777,214 IP addresses, because the first 8 bits for network part are standard reserved. Network Classes were developed in 1981. 16,777,214 IP addresses can be placed in 24 bits for host address, with this on the horizon developers found that they had to partition IP addresses. This partition had to be done in a way so we can have different sizes of a network. Different sizes of network bits eventually created different classes of networks, known today as Class A, Class B, and Class C. This solved the issue with the classes, but with little information given we still needed to identify what is the network class. In octets Class A (network bit 8 host bit 24) always between 0-127, Class B (network bit 16 host bit 16) between 128-191, Class C (network bit 24 host bit 8) between 192-224, Class D (network and host bit not defined) between 225-239, and Class E (network and host bit not defined) between 240-255.
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