# 3.5.4 Lab – Subnetting Scenario 3 Answers

## 3.5.4 Lab – Subnetting Scenario 3 Answers

### Topology

HQ Fa0/0 N/A
S0/0 N/A
S0/1 N/A
Branch 1 Fa0/0 N/A
Fa0/1 N/A
S0/0 N/A
S0/1 N/A
Branch 2 Fa0/0 N/A
Fa0/1 N/A
S0/0 N/A
S0/1 N/A
PC1 NIC
PC2 NIC
PC3 NIC
PC4 NIC
PC5 NIC

### Learning Objectives:

• Determine the number of subnets needed.
• Determine the number of hosts needed.
• Design an appropriate addressing scheme.
• Conduct research to find a possible solution.

### Scenario

In this lab, you have been given the network address 192.168.1.0/24 to subnet and provide the IP addressing for the network shown in the Topology Diagram. The network has the following addressing requirements:

• The Branch 1 LAN 1 will require 15 host IP addresses.
• The Branch 1 LAN 2 will require 15 host IP addresses.
• The Branch 2 LAN 1 will require 15 host IP addresses.
• The Branch 2 LAN 2 will require 15 host IP addresses.
• The HQ LAN will require 30 host IP addresses.
• The Link from HQ to Branch 1 will require an IP address for each end of the link.
• The Link from HQ to Branch 2 will require an IP address for each end of the link.
• The Link from HQ to Branch 3 will require an IP address for each end of the link.

(Note: Remember that the interfaces of network devices are also host IP addresses and are included in the above addressing requirements.)

### Task 1: Examine the Network Requirements.

Examine the network requirements and answer the questions below. Keep in mind that IP addresses will be needed for each of the LAN interfaces.

How many subnets are needed? ___________

What is the maximum number of IP addresses that are needed for a single subnet? ___________

How many IP addresses are needed for each of the branch LANs? __________

What is the total number of IP addresses that are needed? _________

#### Step 1 Subnet the 192.168.1.0/24 network into the appropriate number of subnets.

Can the 192.168.1.0 be subnetted to fit the network requirements? __________

If the “number of subnets” requirement is met, what is the maximum number of hosts per subnet? __________

If the “maximum number of hosts” requirement is met, what is the number of subnets that will be available to use? __________

You do not have enough address space to implement an addressing scheme. Research this problem and propose a possible solution. Increasing the size of your original address space is not an acceptable solution. (Hint: We will discuss solutions to this problem in Chapter 6)
_____________________________________________________

Attempt to implement your solution using Packet Tracer. Criteria for successful implementation of a solution include:

• Only the 192.168.1.0/24 address space is used.
• PCs and routers can ping all IP addresses.