Levels/L4 · Network Devices/Lesson 05Quiz · 05Level 4 QuizTest what you learned in this level: 8 questions, no timer. Wrong answers are corrected instantly.Duration4minLevelL4TypeQuizProgress5/ 5Question 01 / 08Which layer does a switch work at?APhysicalBData LinkCNetworkDTransportNext question→PreviousFirewallNextSubnetting Basics