IP Addressing - WordPress.com

doctorheavenlyNetworking and Communications

Oct 24, 2013 (3 years and 10 months ago)

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IP Addressing

&
Subnetting
!!!

Look at me!!!


Know me!!!

Memorize me!!!

126

16,384

2,097,152

16,777,
214

65,534

254

Let’s Play!!

IP Address:

192.168.1.10

Class:

Binary Equivalent:

Subnet

Mask:

Let’s Play!!

IP Address:

192.168.1.10 /24

Class:

C

Binary Equivalent:

11000000.10101000.00000001.00001010

Subnet

Mask:

255.255.255.0

Practice
-
Binary:


Translate these addresses into binary:


213.45.37.123


192.167.24.64


17.32.193.250



What classes do they belong to?


Practice
-

Binary:


Translate these addresses into binary:


213.45.37.123:


11010101.00101101.00100101.01111011


192.167.24.64:


11000000.10100111.00011000.01000000


17.32.193.250:


00010001.00100000.11000001.11111010


What classes do they belong to?


C, C, A

Magic Number:


In binary, which bit of the subnet mask (left to right)
switches from 1’s to 0’s?


Ex: /24: 255.255.255.0


11111111.11111111.11111111.
0
0000000



Now you try:


/28

Magic Number:


Now you try:


/28


255.255.255.240


11111111.11111111.11111111.1111
0
000

Magic Number:


Why is this important?


/28


255.255.255.240


11111111.11111111.11111111.1111
0
000


Subtract the value of that octet from 256.


11110000=240


256
-
240= 16


Calculate the multiples of your magic number (16) from 0 up to 256


0


16


32


48


64…etc

Find the multiple of the magic number that is closest to but no
greater than the IP address’s
interesting octet
value


0


16


32


48


64


80


96


112


128


144


160


176


192


208


224


240




*interesting octet is the
octet in which the 1’s
change to 0’s

Find the multiple of the magic number that is closest to but no
greater than the IP address’s
interesting octet
value


0


16


32


48


64


80


96


112


128


144


160


176


192


208


224


240




*interesting octet is the
octet in which the 1’s
change to 0’s

Practice
-
Subnetting
:


You have been given the IP address 213.45.37.0 /24 You
require at least 15 subnets. List:


The required subnet mask


The number of total subnets


The number of available hosts per subnet


The first four subnet addresses


The valid range of host addresses for the first four
subnets


The Broadcast address for each subnet


Practice
-
Subnetting
:


You have been given the IP address 213.45.37.0 /24 You require at least 15 subnets. List:


The required subnet mask: 255.255.255.240 (/28)


The number of total subnets: 16


The number of available hosts per subnet: 14


The first four subnet addresses:


213.45.37.0


213.45.37.16


213.45.37.32


213.45.37.48


The valid range of host addresses for the first four subnets


213.45.37.1
-

14


213.45.37.17
-

30


213.45.37.33
-

46


213.45.37.49
-

62


The Broadcast address for each subnet


213.45.37.15


213.45.37.31


213.45.37.47


213.45.37.63


You have been given the IP address 200.100.50.0 /24
You require at least 3 subnets. List:


The required subnet mask


The number of total subnets


The number of available hosts per subnet


The first four subnet addresses


The valid range of host addresses for the first four
subnets


The Broadcast address for each subnet


You have been given the IP address 200.100.50.0 /24 You require at least 3 subnets. List:


The required subnet mask: /26: 255.255.255.192


The number of total subnets: 4


The number of available hosts per subnet: 62


The first four subnet addresses:


200.100.50.0


200.100.50.64


200.100.50.128


200.100.50.192


The valid range of host addresses for the first four subnets


200.100.50.1
-
62


200.100.50.65
-
126


200.100.50.129
-
190


200.100.50.193
-
254


The Broadcast address for each subnet


200.100.50.63


200.100.50.127


200.100.50.191


200.100.50.255


You have been given the IP address 10.1.5.10 /29

You require at least 6 subnets. List:


The required subnet mask


The number of total subnets


The number of available hosts per subnet


The first four subnet addresses


The valid range of host addresses for the first four
subnets


The Broadcast address for each subnet



You have been given the IP address 10.1.5.10 /21

You require at least 6 subnets.


What subnet mask should you use?


You have a host at the address of 10.1.5.120 that is
experiencing issues. In order to troubleshoot, what is
the address of that subnet?



You have been given the IP address 10.1.5.10 /21

You require at least 6 subnets.


What subnet mask should you use?


/21: 255.255.248.0


You have a host at the address of 10.1.5.120 that is
experiencing issues. In order to troubleshoot, what is
the address of that subnet?


10.1.5.0




10.5.10.200 /26


You need to have no more than 25 hosts in each subnet.



Go.


Subnets:


10.5.10.192


10.5.10.224


Ranges:


10.5.10.193


222


10.5.10.225


254


Broadcast:


10.5.10.223


10.5.10.255