Isaiec 62443 Cybersecurity Fundamentals Specialist · Free Practice Question Easy
Question 4
In the Open Systems Interconnection (OSI) model which layer would use the User Datagram Protocol (UDP) ?
- A Data link layer
- B Transport layer
- C Application layer
- D Session layer
Reveal correct answer
Correct answer: B
Explanation
In the Open Systems Interconnection (OSI) model, UDP (User Datagram Protocol)) operates at Layer 4, which is the Transport Layer.The Transport Layer is responsible for providing communication services between applications running on different hosts. UDP is a connectionless protocol that provides a simple and lightweight way to send datagrams (packets) over a network. Unlike TCP, UDP does not establish connections before data transmission, does not provide error checking or reliable delivery of data, and does not manage flow control or sequencing of packets. Instead, it focuses on delivering data as quickly as possible, making it suitable for applications where speed and efficiency are prioritized over reliability.Discussion
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