What is an IP Address (Part2)
why the IP address starts with 192.168 and some times 10.10what is the private IP address pool
what is the public IP address pool
IP address classes
Class
|
Range of
first octet |
Format
|
Default subnet mask
|
Number of networks
|
Number of addresses per network (hosts)
|
A
|
1-126
|
N.H.H.H
|
255.0.0.0
|
27 = 128
|
224 = 16777216
|
B
|
128-191
|
N.N.H.H
|
255.255.0.0
|
214 = 16384
|
216 = 65536
|
C
|
192-223
|
N.N.N.H
|
255.255.255.0
|
221 = 2097152
|
28 = 256
|
D
|
The addresses between 224 and 255
| ||||
E
|
** N = Network portion (Network ID)
** H = Host portion (Host ID)
** H = Host portion (Host ID)
Class
|
Range of
first octet |
Ranges of private networks
|
Uses
|
A
|
1-126
|
10.0.0.0 – 10.255.255.255
|
was designed only for very big networks
|
B
|
128-191
|
172.16.0.0-172.31.255.255
|
is best for medium sized networks
|
C
|
192-223
|
192.168.0.0-192.168.255.255
|
is best for smaller networks.
|
D
|
The addresses between 224 and 255
|
is used for multicast addresses
| |
E
|
is used for scientific purposes
|
Note : all
private IP address in class A,B or C will be located in these ranges
because the rest of these ranges called public IP addresses which are
owned by the IANA organization (who sells this IPs to the ISP all over
the world)
Each IP address has two components :-
1- Network ID - (N)
2- Host ID - (H)
Ways to assign ip address to your device ( IP address assignment )
1- DHCP
2- APIPA = 169.254.x.x auto configuration range when a host can’t get an IP address from a DHCP server
3- Static IP addresses : manually assigned to a computer by the user
check what is the IP address? (part1) to know more
see also DHCP
check this video to know your IP address
