IP : Internet Protocol : used for addressing internet enabled devices, Types : ipv4 ,ipv6
IPV4 :
– 32 bit unique addressing of computer network. We can get max of 4billion IP’s including public & private .
– IPV4 is means 4 octets binary number
| IP Decimal | Binary Value |
| 192.168.1.101 | 11000000.10101000.00000001.01100101 |
| IP Decimal | Octet 1 | Octet 2 | Octet 3 | Octet 4 |
| 192.168.1.101 | 11000000. | 10101000. | 00000001. | 01100101 |
IPV4 Classes : uses – subnet mask – Possible No of Hosts
| IP Class | Range | Use | Subnet | Subnet indication | Usable IP’s |
| Class A | 0-126 | Large No of Hosts | 255.0.0.0 | N.H.H.H | 16 Million |
| Class B | 129-191 | Medium Size N/W | 255.255.0.0 | N.N.H.H | 65 Thousand |
| Class C | 192-223 | Local Area N/W | 255.255.255.0 | N.N.N.H | 256 |
| Class D | 224-239 | Reserved for Multicasting | – | – | – |
| Class E | 240-255 | Research and Development , Future Use | – | – | – |
127 is loopback IP used for testing purpose - local host