CCNA Routing & Switching :IPv4 Address Classification

• IP Address is Logical Address. It is a Network Layer address (Layer 3).
• IP address is given to every device in the network and it is used to identify the device with in the network.

IPV4 address classifications

Total IP Address Range of IPv4 is 0.0.0 .0 to 255.255.255.255

IP Addresses are divided into 5 Classes

CLASS Class Ranges
Octet Format
No. Networks & Hosts

A 0.0.0.0 – 127.255.255.255 N.H.H.H 126 Networks & 16777214 Hosts per Network

B 128.0.0.0 – 191.255.255.255 N.N.H.H 16384 Networks & 65534 Hosts per Network

C 192.0.0.0 – 223.255.255.255 N.N.N.H 2097152 Networks & 254 Hosts per Network

D 224.0.0.0 – 239.255.255.255 Reserved for multicast traffic

E 240.0.0.0 – 255.255.255.255
Reserved for Research and development

source

ipv4