(ISC)2 Certified in Cybersecurity Practice Exam

What are the layer names for the TCP model?

1. A) Network Interface, Internet, Transport, Application

2. B) Transport, Session, Presentation, Application

3. C) Data Link, Network, Transport, Presentation

4. D) Physical, Data Link, Network, Session

The correct answer is: A) Network Interface, Internet, Transport, Application

The TCP model, also known as the TCP/IP model, consists of four layers: Network Interface, Internet, Transport, and Application. This model is foundational to understanding how data is transmitted over networks and is designed to facilitate communication between different systems. - The Network Interface layer deals with the physical hardware and data link protocols used to connect devices on a local network. It includes protocols like Ethernet and Wi-Fi. - The Internet layer is responsible for addressing and routing packets across the network. It includes protocols such as IP (Internet Protocol). - The Transport layer ensures that data is transferred reliably between two endpoints. This includes protocols such as TCP (Transmission Control Protocol) and UDP (User Datagram Protocol), which manage error checking and data flow control. - Finally, the Application layer interfaces directly with user applications and services, supporting protocols such as HTTP (Hypertext Transfer Protocol), FTP (File Transfer Protocol), and others that enable user-level functionalities. Understanding these layers is crucial for comprehending how data moves through a network and how various network protocols interact to facilitate communication across the internet. The other choices represent either protocols or layers from different models that do not accurately reflect the structure or purpose of the TCP/IP model.