CCNA Module 1 Chapter 2 – Questions and Answers

CCNA Module 1 Chapter 2 – Questions and Answers


In this blog post, we will explore Module 1 Chapter 2 of the CCNA (Cisco Certified Network Associate) curriculum. This chapter focuses on the fundamentals of networking which include understanding network protocols, the importance of the OSI model, and the role of different network devices. You will find a comprehensive set of questions and their answers to test your knowledge in the field of networking.

Chapter 2 – Questions and Answers

1. What is a network protocol?

A network protocol is a set of rules that governs the communication between devices in a network. It defines the format and order of messages exchanged, as well as the actions taken upon sending or receiving data. Examples of common network protocols include TCP/IP, HTTP, and DNS.

2. Why is the OSI model important in networking?

The OSI (Open Systems Interconnection) model is important in networking as it provides a conceptual framework for understanding and implementing network protocols. It consists of seven layers, each with specific functions and responsibilities. The model helps to ensure interoperability between different network devices and technologies.

3. What is the role of a router in a network?

A router is a network device that forwards data packets between different networks. It operates at the network layer (Layer 3) of the OSI model and makes decisions based on IP addresses to determine the best path for data transmission. Routers play a crucial role in connecting networks and enabling communication between devices in different subnets.

4. Explain the difference between a hub and a switch.

A hub is a network device that operates at the physical layer (Layer 1) of the OSI model. It receives incoming data packets and broadcasts them to all devices connected to it, regardless of the intended recipient. This results in inefficient use of network resources and increased network congestion.

On the other hand, a switch operates at the data link layer (Layer 2) of the OSI model. It keeps a table that maps MAC addresses to specific ports, allowing it to send data packets only to the intended device. This improves network efficiency, reduces collisions, and enhances overall network performance.

5. What is the purpose of the Network Interface Card (NIC)?

The Network Interface Card (NIC) is a hardware component that allows a device to connect to a network. It provides the necessary physical connection between the device and the network medium, such as Ethernet or Wi-Fi. The NIC also handles the conversion of data between the device and the network, ensuring compatibility and smooth communication.


In this blog post, we have covered some key questions and answers related to Module 1 Chapter 2 of the CCNA curriculum. Understanding network protocols, the OSI model, and the role of network devices is essential for building a solid foundation in networking. By familiarizing yourself with these concepts, you will be better prepared to tackle more advanced topics in your CCNA journey.

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