Check Point Certified Security Administrator (CCSA) Practice Exam

How many layers make up the TCP/IP model?

1. 2

2. 4

3. 6

4. 7

The correct answer is: 4

The TCP/IP model is comprised of four layers, which are critical in facilitating communication over networks. These layers are: 1. **Application Layer**: This is where end-user interaction occurs. Protocols such as HTTP, FTP, and SMTP operate in this layer, providing services that applications use to communicate over a network. 2. **Transport Layer**: Responsible for ensuring that data is transferred reliably and in the correct order, this layer utilizes protocols like TCP (Transmission Control Protocol) and UDP (User Datagram Protocol). 3. **Internet Layer**: This layer handles the routing of data packets across the network. It encapsulates protocols such as IP (Internet Protocol), which is essential for addressing and sending packets across different networks. 4. **Link Layer**: Also known as the network interface layer, it relates to the physical and data link aspects of network communication, including how data is physically transmitted over the network medium and the protocols used to access shared media. This structured model contrasts with others, such as the OSI model, which has seven layers. Understanding these four layers of the TCP/IP model is foundational for working with network protocols and is a key component of network administration.