What is the typical core size for single-mode fiber?

After verifying the system is operating, you need to document the solution.Typically, you do this with a(n) ________management system

a. Solution b. Incident c. Flow chart d. None of the above

Several users are reporting that they are unable to connect to the network. After further investigation, the network administrator notices that a newly configured Layer 2 device lost its configuration. Which of the following MOST likely caused the issue?

A. Wrong default gateway B. Wrong DNS C. Switching loop D. Power failure