Lab - Calculate IPv4 Subnets (Problems & Correct Findings (2026/2027)

Lab - Calculate IPv4 Subnets (Problems &
Correct Findings (2026/2027)
Objectives
Part 1: Determine IPv4 Address Subnetting Part
2: Calculate IPv4 Address Subnetting

Background / Scenario
The ability to work with IPv4 subnets and determine network and host information based on a given IP address
and subnet mask is critical to understanding how IPv4 networks operate. The first part is designed to reinforce
how to compute network IP address information from a given IP address and subnet mask. When given an IP
address and subnet mask, you will be able to determine other information about the subnet.
• 1 PC (Windows with Internet access)
• Optional: IPv4 address calculator

Instructions
Fill out the tables below with appropriate answers given the IPv4 address, original subnet mask, and new
subnet mask.

Problem 1:

Given:

Host IP Address: 192.168.200.139

Original Subnet Mask 255.255.255.0

New Subnet Mask: 255.255.255.224



Find:

Number of Subnet Bits
27-24=3 blank




Number of Subnets Created
8
blank




Number of Host Bits per Subnet
32-27=5 blank

, Lab - Calculate IPv4 Subnets




Number of Hosts per Subnet
30 blank




Network Address of this Subnet
192.168.200.128 blank




IPv4 Address of First Host on this Subnet
192.168.200.129 blank




IPv4 Address of Last Host on this Subnet
192.168.200.158 blank




IPv4 Broadcast Address on this Subnet
192.168.200.159 blank



Problem 2:

Given:

Host IP Address: 10.101.99.228

Original Subnet Mask 255.0.0.0

New Subnet Mask: 255.255.128.0




Find:

Number of Subnet Bits
19-16=3
blank




Number of Subnets Created
8
blank




Number of Host Bits per Subnet
32-19=13 blank




Number of Hosts per Subnet 8190
blank




Network Address of this Subnet
172.22.32.0 blank