Answer to Question #290789 in Computer Networks for Hazard

Question

 You have been allocated a class B network address of 135.1.0.0 and need to create 4 subnets each with around 200 hosts what is the easiest mask to use to satisfy the criteria?

Answer 1

 You have been allocated a class B network address of 135.1.0.0 and need to create 4 subnets each with around 200 hosts what is the easiest mask to use to satisfy the criteria?

Solution:

A subnet is a logical subdivision of an IP network.

Sub netting is the process of dividing a network into two or more networks.

Class B ranges from 128-191 –Network address 255.255.0.0

Subnet Table

Subnet

 

1

2

4

8

16

32

64

128

256

Host

 

256

128

64

32

16

8

4

2

1

Subnet Mask

/24

/25

/26

/27

/28

/29

/30

/31

/32

 

Class B 135.1.0.0 –we need to create 4 subnets each with around 200 host.

In the table we choose column with 4 subnets -4,64,/26

4 -Means 4 subnets,64-Means each subnet will have will have total hosts IDs

/26 –Means it is the new subnet mask for these 4 subnets

Here we bring the original network ID which is 135.1.0.0 in the first column

Network ID

Subnet

Host ID range

#useable host

Broadcast ID

135.1.0.0

/26

135.1.0.1-135.1.0.62

62

135.1.0.63

135.1.0.64

/26

135.1.0.65-135.1.0.126

62

135.1.0.127

135.1.0.128

/26

135.1.0.129-135.1.0.190

62

135.1.0.191

135.1.0.192

/26

135.1.0.193-135.1.0.254

62

135.1.0.254

 

The first host range –First subnet 1-62 is between network ID 0 and broad cast ID 63

The second is 65-126 is between 64 and 27 and so on to the next

In broadcast Id we can tell with the reference to the next network ID less 1,64-1=63,the next is by adding 64 to 63 to give 127,127 add 64 is 191,191 add 64 is 254.

 4 Subnets by the question are:-

135.1.0.0/26

135.1.0.64/26

135.1.0.128/26

135.1.0.192/26