Which layer of the OSI is the Data encapsulated into Packets?

The data is encapsulated into packets at the Network layer (Layer 3) of the OSI model. Here are the steps:

1. The process begins at the Application layer (Layer 7) where data is generated.
2. This data is then passed down to the Presentation layer (Layer 6) where it is formatted in a way that the receiving application can understand.
3. The Session layer (Layer 5) establishes, manages, and terminates connections between applications.
4. The Transport layer (Layer 4) breaks the data into smaller units called segments.
5. The Network layer (Layer 3) is where these segments are encapsulated into packets. This layer also determines the best path for data transmission.
6. The Data Link layer (Layer 2) then frames these packets.
7. Finally, the Physical layer (Layer 1) transmits these frames as a stream of bits across the network medium.