CCNA 2 Subnetting Questions Blog

CCNA 2 Subnetting Questions Blog

Welcome to our CCNA 2 subnetting questions blog post!


Subnetting is a fundamental concept in networking that allows for efficient allocation of IP addresses. It is a crucial skill for any network engineer, and mastering subnetting can greatly enhance your understanding and troubleshooting abilities. In this blog post, we will cover some common CCNA 2 subnetting questions to test your knowledge and help you sharpen your subnetting skills.

Question 1: Subnet Mask Calculation

What is the subnet mask for a network with 30 hosts?

To determine the subnet mask, we need to find the number of bits required to accommodate the given number of hosts. In this case, 30 hosts require 5 bits (2^5 = 32). Therefore, the subnet mask would be (/27).

Question 2: IP Subnetting

Given the IP address, create two subnets with an equal number of hosts.

To create two subnets with an equal number of hosts, we need to borrow one bit from the host portion of the IP address. This gives us two subnet IDs: and, both with 126 assignable host addresses.

Question 3: Variable-Length Subnet Masking (VLSM)

You have a network with the IP address Divide this network into subnets to accommodate the following:

  • Subnet A: 150 hosts
  • Subnet B: 75 hosts
  • Subnet C: 30 hosts

To divide the network into subnets of different sizes, we can use variable-length subnet masking (VLSM). Subnet A requires 8 host bits, Subnet B requires 7 host bits, and Subnet C requires 5 host bits. By allocating the necessary number of host bits to each subnet, we can create three subnets:,, and


Subnetting is a vital skill for network engineers, and these CCNA 2 subnetting questions are designed to test and enhance your understanding of subnetting concepts. By practicing subnetting regularly, you will become more proficient in IP address allocation, designing networks, and troubleshooting connectivity issues. Stay tuned for more networking tutorials and resources on our blog!

Leave a Comment