Lecture 5(b): IP Addressing


Conversion in Binary Form

IP Address in decimal form 192  .  168  .  30 . 24

First Octet      128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          1            1         0           0      0        0        0       0    =          192

Second Octet  128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          1            0         1           0      1        0        0       0    =          168

Third Octet    128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          0            0         1           0      0        0        0       0    =          30

Fourth Octet  128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          0            0         0           1      1        0        0       0    =          24


Conversion in Decimal Form

IP Address in binary form 11001100 . 00011110 . 00111111 . 00011100

First Octet      128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          1            1         0           0      1        1        0       0    =          204

Second Octet  128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          0            0         0           1      1        1        1       0    =          30

Third Octet    128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          0            0         1           1      1       1         1       1    =          63

Fourth Octet  128    .   64   .    32   .    16  .   8   .    4   .    2   .   1
                          0            0         0           1      1        1        0       0    =          28

Reference,very easy understanding
http://www.youtube.com/watch?v=qWxiXU02ZQM 

Conversion in Hexadecimal/Binary Form:

Network address :- Network address is a very first IP address of any network or subnetwork which can  not be given to any host. If the network address is blocked whole network will be blocked because it represent the whole network.
You may say that it is a summary address of any network.
Example : 192.168.1.0 is a network address of 192.168.1.1 – 192.168.1.255
      with default subnet mask.

By ANDing the Host address of 192.168.10.2 with 255.255.255.0
(its network mask) we obtain the network address of 192.168.10.0

Broadcast address :-
Broad cast address is very last IP address of any network and it is responsible for broadcasting. It also can not given to any host.
Example : 192.168.1.255 is a network address of 192.168.1.0 – 192.168.1.224
    with default subnet mask.
In Next Lecture We will Start Subnetting.

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