A system administrator is tasked with dividing the network so that each department is separate from the other. Which of the following should be used to accomplish this task?

Which one of the following technologies provides a function interface that allows developers to directly interact with systems without knowing the implementation details of that system?

A. Data dictionary B. Object model C. Source code D. API

When troubleshooting a T1 connection, the support representative from the provider instructs a technician to place a special device into the CSU/DSU. Using this device the provider is able to verify that communications are reaching the CSU/DSU. Which of the following was MOST likely used by the technician?

A. Cable analyzer B. Toner probe C. OTDR D. Loopback plug