Final answer:
Encryption is found in the Transport layer of the OSI model, specifically in Layer 4. This layer is responsible for establishing secure communication channels.
Step-by-step explanation:
Encryption is found in the Transport layer of the OSI model, which is Layer 4. This layer is responsible for establishing a secure communication channel between two devices. One example of encryption at this layer is the Transport Layer Security (TLS) protocol, which ensures data confidentiality and integrity.