The first line of a class declaration is known as the ____________.

Which of the following does the OSPF routing protocol use to verify that a link between to routers is active and the routers are communicating?

A) "Hello" packets B) ARP messages C) LSAs D) Ping

A user reports that email does not work. Which of the following ordered steps should the administrator take to address the issue according to the troubleshooting theory?

A. Reboot the email server, document the findings, collect additional information about the issue, and then determine if the issue affects one or multiple users. B. Document the findings, determine if the issue affects one or multiple users, collect additional information about the issue, and then reboot the email server. C. Collect additional information about the issue, determine if the issue affects one or multiple users, reboot the email server, and then document the findings. D. Collect additional information about the issue, document the findings, determine if the issue affects one or multiple users, and then reboot the email server.