Exam CC Topic 4 Question 24 Discussion
Actual exam question for ISC's CC exam
Question #: 24
Topic #: 4
Question #: 24
Topic #: 4
TCP and UDP reside at which layer of the OSI model?
Suggested Answer: B Vote an answer
TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at theTransport layer (Layer 4)of the OSI model. This layer is responsible for end-to-end communication, segmentation, flow control, and error handling.
TCP provides reliable, connection-oriented communication with acknowledgments and retransmissions. UDP provides connectionless communication optimized for speed and low latency.
The Session layer manages session establishment, and the Presentation layer handles formatting and encryption. Neither is responsible for transport-level data delivery.
Understanding protocol placement is essential for firewall rules, intrusion detection, and network troubleshooting. Most security controls rely heavily on Transport-layer awareness.
TCP provides reliable, connection-oriented communication with acknowledgments and retransmissions. UDP provides connectionless communication optimized for speed and low latency.
The Session layer manages session establishment, and the Presentation layer handles formatting and encryption. Neither is responsible for transport-level data delivery.
Understanding protocol placement is essential for firewall rules, intrusion detection, and network troubleshooting. Most security controls rely heavily on Transport-layer awareness.
by David at Feb 10, 2026, 04:37 AM
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