Palo Alto Networks (PANW) Certified Cybersecurity Entry-level Technician (PCCET) Practice Exam

Which layer of the OSI model does the Network layer correspond to?

1. Layer 1

2. Layer 2

3. Layer 3

4. Layer 4

The correct answer is: Layer 3

The Network layer corresponds to Layer 3 of the OSI (Open Systems Interconnection) model. This layer is responsible for the routing of data packets through the network by determining the best path for data transmission across different networks. Functions at this layer include logical addressing (such as IP addresses), packet forwarding, and path determination. The services provided by the Network layer enable communication between computers on different networks and facilitate the exchange of information regardless of the underlying hardware and physical connections. Understanding the hierarchy of the OSI model is crucial as it not only defines how data communication occurs but also assists in troubleshooting network issues and implementing network designs. Layer 1 deals with the physical medium; Layer 2 is concerned with data link protocols and local network communication; and Layer 4 focuses on the transport protocols that ensure data is delivered reliably and in order. Each layer serves specific functions, contributing to the overall process of data sending and receiving, with Layer 3 playing a vital role in inter-network communication.