# Subnet Exercise 04

Updated on July 4, 2011 This page contains one exercise based on IP addressing and subnetting. At first the problem definition and some questions are given. Later, the solution of the questions are given. Please, at first try to solve yourself. When you have finished then look the answers / solutions. If you go forward in this way, I'm sure you do better.

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## Problem Definition and Questions:

Number of needed usable subnets are....28

Based on the above information, find the followings:

[a]Which class does the IP belong?

[b]What is the default subnet mask of that IP?

[c]What is the custom subnet mask of that IP?

[d]How many bits are required to make the subnet?

[e]What is the the total number of subnets?

[f]What is the total number of usable subnets?

[g]What is the total number of host addresses?

[h]What is the total number of usable host addresses?

[i]
What is the total number of host bits?

## Solution of the above questions:

[a]Which class does the IP belong?
Ans        Class A

[b]What is the default subnet mask of that IP?
Ans        255.0.0.0

[c]What is the custom subnet mask of that IP?
Ans        255.255.255.224

[d]How many bits are required to make the subnet?
Ans        19

[e]What is the the total number of subnets?
Ans        5,24,288

[f]What is the total number of usable subnets?
Ans        5,24,286

[g]What is the total number of host addresses?
Ans        32

[h]What is the total number of usable host addresses?
Ans        30

[i]What is the total number of host bits?
Ans        13

© Written by rancidTaste

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• Uzair

7 years ago

i guess these are the correct answers

[a]Which class does the IP belong?

Ans Class A

[b]What is the default subnet mask of that IP?

Ans 255.0.0.0

[c]What is the custom subnet mask of that IP?

Ans 255.248.0.0

[d]How many bits are required to make the subnet?

Ans 5

[e]What is the the total number of subnets?

Ans 32

[f]What is the total number of usable subnets?

Ans 30

[g]What is the total number of host addresses?

Ans 524288

[h]What is the total number of usable host addresses?

Ans 524288-2=524286

[i]What is the total number of host bits?

Ans 19

• pao

7 years ago

[g]What is the total number of host addresses?

Ans 524288

[h]What is the total number of usable host addresses?

Ans 524286

and this is the right answer for this questions too right?

• suresh

8 years ago

me is correct

• me

8 years ago

yeah, the custom subnet mask is 255.248.0.0 because the question asks 28 subnets and not 28 hosts

• hi

8 years ago

both are wrong...

• Cccna

8 years ago

The correct Answer is

Solution of the above questions:

[a]Which class does the IP belong?

Ans Class A

[b]What is the default subnet mask of that IP?

Ans 255.0.0.0

[c]What is the custom subnet mask of that IP?

Ans 255.255.255.224

[d]How many bits are required to make the subnet?

Ans 19

[e]What is the the total number of subnets?

Ans 524,288

[f]What is the total number of usable subnets?

Ans 524,286

[g]What is the total number of host addresses?

Ans 32

[h]What is the total number of usable host addresses?

Ans 30

[i]What is the total number of host bits?

Ans 5

• khalil

9 years ago

is this a rite answer i think its not

Solution of the above questions:

[a]Which class does the IP belong?

Ans Class A

[b]What is the default subnet mask of that IP?

Ans 255.0.0.0

[c]What is the custom subnet mask of that IP?

Ans 255.255.255.224

[d]How many bits are required to make the subnet?

Ans 19

[e]What is the the total number of subnets?

Ans 5,24,288

[f]What is the total number of usable subnets?

Ans 5,24,286

[g]What is the total number of host addresses?

Ans 32

[h]What is the total number of usable host addresses?

Ans 30

[i]What is the total number of host bits?

Ans 13

working