Description: Understand IPv4, IPv6 and Addressing Methods

2. • IP address Network ID + Host ID
• 192.168.39.240
• Examples of IP addresses –
• 20.40.200.15
• 141.161.20.255
8Bit

3. • Class A – 1.0.0.0 to 126.0.0.0
• Class B – 128.0.0.0. to 191.255.0.0
• Class C – 192.0.0.0 to 223.255.255.0
• Class D – 224 – 239 for multicast
• Class E – 240-255 for Research
For small Network Class C
For large Network Class A

4. • Loopback address 127.0.0.0
• This is used to check our Nw card
• Ping 127.0.0.0
• How to identify IP of which class ?
By seeing the first octet
• Example – 20.100.201.15 class A

5. • Network id
• Class A
• Class B
• Class C
Nw bit 1 Host bit 0
In class C first 3 octet are reserved for Network and
last octet is reserved for host.
N H H H
N N H H
N N N H

6. Identify class and nw id
• How to identify Network id
• Example – 115.10.10.15 --- class A
• So 115.0.0.0 is its network id
• 196.10.15.20 --- class C
So 196.10.15.0 is its network id
• 150.15.10.50 ---- Class B
So 150.15.0.0 is Network id

7. Identify subnet mask
• 115.10.10.20 ---- class A Ip
N H H H
11111111.00000000.00000000.00000000
255 0.0 --- subnet mask of class A
Class B --- 160.15.20.10
11111111.11111111.0.0
255.255.0.0
In class A 8 bits , in class B 16 bit and in class C 24 bits are reserved for network.