IPv4 subnetting worksheet with answers

Free printable IPv4 subnetting worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheet Practise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________ Date: ____________

1.Easy

An access list must match the network 172.16.0.0/23. Access lists use a wildcard mask, the inverse of the subnet mask. What is the third octet x of the wildcard mask?

/23

x =

2.Easy

How many usable host addresses H are there in an IPv4 subnet with prefix /22?

/22

H =

3.Medium

The network 192.168.104.0/24 is divided into /27 subnets, numbered 1, 2, 3, … from the lowest address (subnet 1 starts at .0). What is the fourth octet x of the broadcast address of subnet 6?

192.168.104.0/24/27subnet 6 (subnet 1 starts at .0)

x =

4.Medium

The network 192.168.216.0/24 is divided into /29 subnets, numbered 1, 2, 3, … from the lowest address (subnet 1 starts at .0). What is the fourth octet x of the broadcast address of subnet 7?

192.168.216.0/24/29subnet 7 (subnet 1 starts at .0)

x =

5.Hard

A host has the address 10.20.54.109/29. What is the fourth octet x of the last usable host address in its subnet?

10.20.54.109/29

x =

6.Hard

The network 192.168.116.0/24 is split with VLSM for these LANs: A: 12 hosts, B: 118 hosts, C: 61 hosts, D: 3 hosts. Subnets are allocated from .0 upwards, the LAN with the most hosts first, each with the smallest subnet that fits. What is the fourth octet x of the network address of LAN D?

A: 12B: 118C: 61D: 3

x =

Answer key

1. x = 1
2. H = 1022
3. x = 191
4. x = 55
5. x = 110
6. x = 208

Full step-by-step solutions: practise this topic on examproblems.com.