Introduction to Network Devices

Welcome to this hands-on lab where you'll explore the world of network devices and learn how to configure a small Local Area Network (LAN) using GNS3. In this exercise, you'll practice examining and configuring a simple LAN topology, including a firewall, router, and hosts. You'll learn how to use GNS3 to simulate a network environment and configure devices to enable communication and resource sharing.

Throughout this lab, you'll work with a variety of network devices, including a pfSense firewall, a router, and hosts running Linux and Firefox. You'll learn how to configure these devices to enable communication between them and to the Internet. You'll also learn how to use GNS3 to simulate a network environment and test your configurations.

By the end of this lab, you'll have a better understanding of how network devices work together to enable communication and resource sharing. You'll also have hands-on experience with configuring a small LAN using GNS3. So, let's get started

Lab Questions and Answers: 1.1 Core Concepts

1. A network device is best defined as:

A. Any device that uses TCP/IP.

B. Any device that facilitates local or wide-area communication between systems.

C. A router or a switch.

D. A physical piece of hardware used for networking.

Answer: B

2. If an IP address outside the LAN is needed, then traffic is sent to a __________.

Answer: router

3. A _________ controls the flow of traffic from a trusted to an untrusted area.

Answer: firewall

4. Internal users will typically be granted Internet access through a _______ .

Answer: proxy

Lab Questions and Answers: 1.2 Guided Exercise

1. What is the WAN address of the firewall device?

Answer: 66.67.68.2


2. What is the Web device's IP Address?

Answer: 100.200.100.10


3. Is Web able to ping the ISP device?

A. No, the firewall rules do not allow it.

B. No, Web has no route to 66.67.68.0/24.

C. Yes, the firewall allows it.

D. Yes, Web has a route to 66.67.68.0/24.

Answer: D

4. Is the Web device able to ping the firewall?

A. No, the firewall rules do not allow it.

B. No, Web has no route to 66.67.68.0/24.

C. Yes, the firewall allows it.

D. Yes, Web has a route to 66.67.68.0/24.

Answer: A 

Lab Questions and Answers: 1.3 Challenge Exercise

1. What is the flag for this challenge?

Answer: LayerCake

Conclusion

In this lab, we explored the world of network devices and learned how to configure a small Local Area Network (LAN) using GNS3. We gained hands-on experience with configuring network devices, including setting up static IP addresses, netmasks, and gateways.
By completing this lab, we demonstrated our understanding of network fundamentals and our ability to configure and troubleshoot network devices. We also gained experience with using GNS3 to simulate network environments and test our configurations.
This lab has provided a solid foundation for further exploration of networking topics, including routing protocols and network security.