Now it's time to check your knowledge. Select the best responses, and then check your answers with those in the Assessment:

1. The _____ layer, or layer 5, is responsible for setting up, maintaining, and tearing down a session.
   1. Transport
   2. Application
   3. Session
   4. Presentation
2. The _____ layer, or layer 4, is responsible for transporting the data, either using a connectionless or connection-oriented protocol.
   1. Transport
   2. Application
   3. Session
   4. Presentation

3. The _____ layer, or layer 6, is responsible for proper data formatting along with optional compression and encryption.
   1. Transport
   2. Application
   3. Session
   4. Presentation
4. TCP port 334 is in the range of the _____ ports.
   1. Ephemeral
   2. Well-known
   3. Registered
   4. Secure
5. The PDU at the transport layer is _____.
   1. Data
   2. Frame
   3. Packet
   4. Segment