6-33. What layer of the OSI reference model describes the electrical, the mechanical, and the functional interface of the communications channel? 1. Physical layer 2. Data link layer 3.    Network layer 4. Transport layer 6-34. What layer of the OSI reference model establishes and deletes host-to-host connections across the  network? 1. Data link layer 2.    Network layer 3. Transport layer 4. Session layer 6-35. As a translator for the network, what layer of the OSI reference model provides a common representation for data which can be used between the application processes? 1. Network layer 2. Transport layer 3. Session layer 4. Presentation level/layer 6-36. Which of the following layers of the OSI reference model provides  error-free transmission of information over the physical medium? 1. Physical 2. Data link 3.    Network 4. Transport 6-37. Communications between users on two different machines are established by what layer of the OSI reference model? 1. Data link 2. Network 3. Transport 4. Session 6-38. Based on network conditions and priority of service, what layer of the OSI reference model decides which physical pathway the data should take? 1. Physical 2. Data link 3.    Network 4. Transport 6-39. The application level/layer of the OSI reference model provides the protocols for which of the following user items? 1. Media interface 2. Electronic mail 3. Routing of messages between networks 4. Data compression 6-40. Which of the following is NOT a LAN  topology? 1. Linear 2.  Ring 3. Star 4. EtherNet 6-41. Which of the following features of a linear bus topology should be considered an advantage? 1. Signal interference when nodes are too close to each other 2. System remains operable even when one or more nodes fail 3.    Very secure system 4.    Very easy to run system diagnostics from the LAN administrator 6-42. In which of the following network topologies, if any, is each node individually connected to the network server? 1. Linear bus 2. Star 3.  Ring 4. None of the above 35