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02 IP Addresses? Their Classes.

posted Nov 6, 2012, 5:47 AM by Neil Mathew   [ updated Nov 6, 2012, 6:12 AM ]


IP: Short for Internet ProtocolIP is an address of a computer or other network device on a network using IP or TCP/IP.

There are five classes of available IP ranges: Class A, Class B, Class C, Class D and Class E, while only A, B, and C are commonly used. Each class allows for a range of valid IP addresses. Below is a listing of these addresses.

ClassAddress RangeSupports
Class A1.0.0.1 to 16 million hosts on each of 127 networks.
Class B128.1.0.1 to 65,000 hosts on each of 16,000 networks.
Class C192.0.1.1 to 254 hosts on each of 2 million networks.
Class D224.0.0.0 to for multicast groups.
Class E240.0.0.0 to for future use, or Research and Development Purposes.

Every IP address is broke down into four sets of octets that break down into binary to represent the actual IP address. The below table is an example of the IP 

Binary value:11111111111111111111111111111111
Octet value:8888

If we were to break down the IP "", you would get the below value. In the below table, the first row is the IP address, the second row is the binary values, and the third row shows how the binary value equals the section of the IP address.