Chapter 2: The Open Systems Interconnection Specifications

1. C. A connection-oriented session is set up using what is called a three-way handshake. The transmitting host sends a SYN packet, the receiving host sends a SYN-ACK, and the transmitting host replies with the last ACK packet. The session is now set up.

2. D. TCP and UDP are Transport layer protocols. The Transport layer is Layer 4 of the OSI model.

3. A. The top layer of the OSI model gives applications access to the services that allow network access.

4. A. If the remote server is busy or does not respond to your web browser request, this is an Application layer problem.

5. B. The Presentation layer makes data “presentable” for the Application layer.

6. C. Bridges, like switches, are Data Link layer devices. Hubs, like repeaters, are Physical layer devices. Routers are Network layer devices.