# Subnet Exercise 01

Updated on July 15, 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....999
Number of needed usable hosts are.......60

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 B

[b]What is the default subnet mask of that IP?
Ans 255.255.0.0

[c]What is the custom subnet mask of that IP?
Ans 255.255.255.192

[d]How many bits are required to make the subnet?
Ans 10

[e]What is the the total number of subnets?
Ans 1024

[f]What is the total number of usable subnets?
Ans 1022

[g]What is the total number of host addresses?
Ans 64

[h]What is the total number of usable host addresses?
Ans 62

[i]What is the total number of host bits?
Ans 6

91

11

57